High-Temperature Resistance
Designed for reliable performance in elevated-temperature industrial environments.
HEAT RESISTANT CASTINGS
Engineered to Withstand Extreme Heat.
Built for Industrial Performance.
Explore high-quality heat resistant alloy castings designed for elevated-temperature operations, thermal stability, oxidation resistance and reliable performance in demanding industrial environments.
From furnace components and heat treatment fixtures to specialized industrial castings, Bhanu Special Castings offers application-focused solutions for diverse thermal processing requirements.
UNDERSTANDING HEAT RESISTANT ALLOYS
What Are Heat Resistant Castings?
Advanced Casting Solutions for High-Temperature Industrial Applications
Heat resistant castings are specially engineered alloy components manufactured to perform under elevated temperatures, repeated thermal cycles and demanding operating conditions.
These castings are commonly produced using chromium-nickel alloy steels and other heat resistant compositions designed to provide oxidation resistance, high-temperature strength, creep resistance and dimensional stability.
They are widely used in industrial furnaces, heat treatment equipment, steel plants, cement industries, petrochemical processing and thermal power applications.
Key Advantages
Oxidation & Scaling Resistance
Selected chromium-rich alloys resist surface deterioration under high heat.
Thermal Cycling Resistance
Appropriate grades withstand repeated heating and cooling cycles.
Creep Resistance
Selected alloys resist gradual deformation under prolonged temperature and load.
Structural Stability
Engineered to maintain useful strength and dimensional integrity.
Long-Term Service Performance
Correct alloy selection can improve component life and maintenance intervals.
ENGINEERED FOR ELEVATED-TEMPERATURE SERVICE
High-Temperature Strength & Thermal Stability
Heat resistant castings are designed to retain useful strength and resist deterioration during elevated-temperature service. Their performance depends on alloy composition, casting quality, operating temperature, furnace atmosphere and applied load.
Chromium supports oxidation resistance, while nickel and other selected alloying elements help achieve the structure and properties required for demanding thermal applications.
Oxidation Resistance
Selected alloys form a protective oxide layer that helps reduce scaling and surface deterioration.
Creep Resistance
Suitable grades resist gradual deformation during prolonged exposure to high temperature and sustained load.
Thermal Cycling Performance
Appropriate alloy selection and component design help withstand repeated heating and cooling.
Dimensional Stability
Correct material selection helps limit distortion and maintain component functionality under specified service conditions.
05 INTERNATIONAL STANDARDS & GRADE SPECIFICATIONS
Heat Resistant Steel Grades Across International Standards
Heat resistant cast steels and alloys are specified through national and international standards covering chemical composition, material properties, inspection and delivery requirements.
Select the grade for operating temperature, furnace atmosphere, applied load and thermal cycling. Chromium-nickel cast steels include different alloy families for oxidation resistance and elevated-temperature service.
This table covers the same 16 countries and regions. National standards and project-selected international specifications are identified separately. Similar grade names do not establish interchangeability.
Cross-Reference: International Heat Resistant Casting Standards
| Country / Region | Standard / Specification Basis | Representative Grades / Coverage |
|---|---|---|
 India | IS 4522; IS 3038:2006 (high-temperature pressure service); ISO 11973:2023 (international specification, when agreed) | IS 4522: Gr. 1, Gr. 2, Gr. 3, Gr. 4, Gr. 5, Gr. 6, Gr. 7, Gr. 8, Gr. 9, Gr. 10, Gr. 11, Gr. 12, Gr. 13, Gr. 14. Pressure-service castings: IS 3038 Grade 1 (Gr. I). ISO 11973 grades: GX40CrNiSi25-12 (1.4837), GX40CrNiSi25-20 (1.4848). |
 USA | ASTM A297/A297M; ASTM A217/A217M (high-temperature pressure service) | HF, HH, HI, HK, HE, HT, HU, HW, HX, HC, HD, HL, HN; grade selected for service conditions. Pressure-service castings: ASTM A217 C12A (9Cr-1Mo-V-Nb-N cast steel). P91 is an ASTM A335 pipe grade, not an A297 casting designation. |
 Germany | DIN EN 10295; DIN 17465 (legacy); DIN EN 10213 (pressure castings) | GX40CrNiSi25-12 (1.4837); GX40CrNiSi25-20 (1.4848); GX40NiCrSi35-26 (1.4857) Pressure-service castings: GX12CrMoVNbN9-1 — EN 10213. Compare full requirements with A217 C12A; not a certified equivalent. |
 Europe | EN 10295; EN 10213 (pressure castings) | GX40CrNiSi25-12 (1.4837); GX40CrNiSi25-20 (1.4848); GX40NiCrSi35-26 (1.4857) Pressure-service castings: GX12CrMoVNbN9-1 — EN 10213. Compare full requirements with A217 C12A; not a certified equivalent. |
 China | GB/T 8492-2024 | Heat-resistant cast steels and alloys for general applications. Confirm the Chinese designation and chemistry from the current standard; no automatic ASTM/EN equivalence. |
 Japan | JIS G 5122 | SCH13, SCH13A, SCH21 — representative heat-resistant cast steel designations; verify the full grade requirements. |
 United Kingdom | BS EN 10295; BS EN 10213 (pressure castings) | GX40CrNiSi25-12 (1.4837); GX40CrNiSi25-20 (1.4848); GX40NiCrSi35-26 (1.4857) Pressure-service castings: GX12CrMoVNbN9-1 — EN 10213. Compare full requirements with A217 C12A; not a certified equivalent. |
 France | NF EN 10295; NF EN 10213 (pressure castings) | GX40CrNiSi25-12 (1.4837); GX40CrNiSi25-20 (1.4848); GX40NiCrSi35-26 (1.4857) Pressure-service castings: GX12CrMoVNbN9-1 — EN 10213. Compare full requirements with A217 C12A; not a certified equivalent. |
 Italy | UNI EN 10295; UNI EN 10213 (pressure castings) | GX40CrNiSi25-12 (1.4837); GX40CrNiSi25-20 (1.4848); GX40NiCrSi35-26 (1.4857) Pressure-service castings: GX12CrMoVNbN9-1 — EN 10213. Compare full requirements with A217 C12A; not a certified equivalent. |
 Australia | ASTM A297 / EN 10295 / ISO 11973, as agreed in the purchase specification | Project-specified examples: ASTM A297 HH, HK; or EN 10295 GX40CrNiSi25-20 (1.4848). Not national grade equivalents. |
 South Africa | ASTM A297 / EN 10295 / ISO 11973, as agreed in the purchase specification | Project-specified examples: ASTM A297 HH, HK; or EN 10295 GX40CrNiSi25-20 (1.4848). Not national grade equivalents. |
 Russia | GOST 977 — steel casting framework; grade-specific specification to be agreed | Special-property alloy steel castings. Confirm the cast-grade designation, heat-resistance requirements and acceptance tests; no direct equivalence claimed. |
 Spain | UNE-EN 10295; UNE-EN 10213 (pressure castings) | GX40CrNiSi25-12 (1.4837); GX40CrNiSi25-20 (1.4848); GX40NiCrSi35-26 (1.4857) Pressure-service castings: GX12CrMoVNbN9-1 — EN 10213. Compare full requirements with A217 C12A; not a certified equivalent. |
 Sweden | SS-EN 10295; SS-EN 10213 (pressure castings) | GX40CrNiSi25-12 (1.4837); GX40CrNiSi25-20 (1.4848); GX40NiCrSi35-26 (1.4857) Pressure-service castings: GX12CrMoVNbN9-1 — EN 10213. Compare full requirements with A217 C12A; not a certified equivalent. |
 Norway | NS-EN 10295; NS-EN 10213 (pressure castings) | GX40CrNiSi25-12 (1.4837); GX40CrNiSi25-20 (1.4848); GX40NiCrSi35-26 (1.4857) Pressure-service castings: GX12CrMoVNbN9-1 — EN 10213. Compare full requirements with A217 C12A; not a certified equivalent. |
 South Korea | International specification by agreement: ASTM A297 / EN 10295 / ISO 11973 | Project-specified examples: ASTM A297 HH, HK; or EN 10295 GX40CrNiSi25-20 (1.4848). Not national grade equivalents. |
Standards references
ISO 11973 · ASTM A297 · DIN EN 10295 · GB/T 8492-2024 · JIS G 5122
COUNTRY-WISE MATERIAL GRADES
Interactive Country-Wise Chemical Composition Tables
Select a country to view the heat-resistant grades referenced on this page, including IS 4522 Gr. 1–14 and the traditional ASTM A297 series. All values are mass %. Ranges show minimum–maximum; ≤ indicates a maximum; — means not stated, not zero. Pressure-service and international ISO grades are separately labelled.
India — IS 4522 Gr. 1–14, IS 3038 & ISO References
| Grade | C % | Si % | Mn % | P % | S % | Cr % | Ni % | Mo % | Other Elements % |
|---|---|---|---|---|---|---|---|---|---|
| IS 4522 Gr. 1 | ≤ 0.40 | ≤ 2.00 | ≤ 1.00 | ≤ 0.050 | ≤ 0.050 | 12.0–14.0 | ≤ 1.00 | ≤ 0.50 | — |
| IS 4522 Gr. 2 | 0.30–0.60 | ≤ 2.00 | ≤ 1.00 | ≤ 0.050 | ≤ 0.050 | 27.0–30.0 | — | ≤ 0.50 | — |
| IS 4522 Gr. 3 | 1.20–1.40 | ≤ 2.00 | ≤ 1.00 | ≤ 0.050 | ≤ 0.050 | 27.0–30.0 | — | ≤ 0.50 | — |
| IS 4522 Gr. 4 | 0.20–0.50 | ≤ 2.00 | ≤ 1.00 | ≤ 0.050 | ≤ 0.050 | 26.0–30.0 | 4.0–7.0 | ≤ 0.50 | — |
| IS 4522 Gr. 5 | 0.20–0.50 | ≤ 2.00 | ≤ 2.00 | ≤ 0.050 | ≤ 0.050 | 18.0–20.0 | 8.0–10.0 | ≤ 0.50 | — |
| IS 4522 Gr. 6 | 0.20–0.50 | ≤ 2.00 | ≤ 2.00 | ≤ 0.050 | ≤ 0.050 | 26.0–30.0 | 8.0–10.0 | ≤ 0.50 | — |
| IS 4522 Gr. 7 | 0.20–0.50 | ≤ 2.00 | ≤ 2.00 | ≤ 0.050 | ≤ 0.050 | 23.0–27.0 | 11.0–14.0 | ≤ 0.50 | — |
| IS 4522 Gr. 8 | 0.15–0.35 | ≤ 2.50 | ≤ 1.50 | ≤ 0.050 | ≤ 0.050 | 19.0–21.0 | 13.0–15.0 | ≤ 0.50 | — |
| IS 4522 Gr. 9 | 0.20–0.50 | ≤ 2.00 | ≤ 2.00 | ≤ 0.050 | ≤ 0.050 | 23.0–27.0 | 18.0–22.0 | ≤ 0.50 | — |
| IS 4522 Gr. 10 | 0.20–0.60 | ≤ 2.50 | ≤ 2.00 | ≤ 0.050 | ≤ 0.050 | 28.0–32.0 | 18.0–22.0 | ≤ 0.50 | — |
| IS 4522 Gr. 11 | 0.20–0.50 | ≤ 2.00 | ≤ 2.00 | ≤ 0.050 | ≤ 0.050 | 19.0–23.0 | 23.0–27.0 | ≤ 0.50 | — |
| IS 4522 Gr. 12 | 0.35–0.75 | ≤ 2.50 | ≤ 2.00 | ≤ 0.050 | ≤ 0.050 | 13.0–17.0 | 33.0–37.0 | ≤ 0.50 | — |
| IS 4522 Gr. 13 | 0.35–0.75 | ≤ 2.50 | ≤ 2.00 | ≤ 0.050 | ≤ 0.050 | 17.0–21.0 | 37.0–41.0 | ≤ 0.50 | — |
| IS 4522 Gr. 14 | 0.35–0.75 | ≤ 2.50 | ≤ 2.00 | ≤ 0.050 | ≤ 0.050 | 15.0–19.0 | 64.0–68.0 | ≤ 0.50 | — |
| IS 3038:2006 Gr. 1 — pressure | 0.18–0.25 | ≤ 0.60 | 1.20–1.60 | ≤ 0.040 | ≤ 0.045 | ≤ 0.35 | ≤ 0.50 | ≤ 0.15 | Cu ≤ 0.50; residual-element limits also apply |
| ISO 11973 GX40CrNiSi25-12 | 0.30–0.50 | 1.00–2.50 | ≤ 2.00 | ≤ 0.040 | ≤ 0.030 | 24.0–27.0 | 11.0–14.0 | ≤ 0.50 | — |
| ISO 11973 GX40CrNiSi25-20 | 0.30–0.50 | 1.00–2.50 | ≤ 2.00 | ≤ 0.040 | ≤ 0.030 | 24.0–27.0 | 19.0–22.0 | ≤ 0.50 | — |
IS 4522 Gr. 1–14: published manufacturer composition references; the Grade 7 supplier sheet does not distinguish its Type 1 / Type 2 variants. IS 3038 Gr. 1 is a separate pressure-service grade. ISO 11973 entries are international specifications, not IS equivalents. ≤ denotes a maximum; — means not stated in the cited reference, not zero. Verify the full grade/type, residual elements and applicable edition before ordering.
Data references: Gr. 1 · Gr. 2 · Gr. 3 · Gr. 4 · Gr. 5 · Gr. 6 · Gr. 7 · Gr. 8 · Gr. 9 · Gr. 10 · Gr. 11 · Gr. 12 · Gr. 13 · Gr. 14 · IS 3038 · ISO 11973:2023
USA — ASTM A297 Series & A217 Pressure Grade
| Grade | C % | Si % | Mn % | P % | S % | Cr % | Ni % | Mo % | Other Elements % |
|---|---|---|---|---|---|---|---|---|---|
| A297 HC | ≤ 0.50 | ≤ 2.00 | ≤ 1.00 | ≤ 0.040 | ≤ 0.040 | 26.0–30.0 | ≤ 4.00 | ≤ 0.50 | — |
| A297 HD | ≤ 0.50 | ≤ 2.00 | ≤ 1.50 | ≤ 0.040 | ≤ 0.040 | 26.0–30.0 | 4.0–7.0 | ≤ 0.50 | — |
| A297 HE | 0.20–0.50 | ≤ 2.00 | ≤ 2.00 | ≤ 0.040 | ≤ 0.040 | 26.0–30.0 | 8.0–11.0 | ≤ 0.50 | — |
| A297 HF | 0.20–0.40 | ≤ 2.00 | ≤ 2.00 | ≤ 0.040 | ≤ 0.040 | 18.0–23.0 | 8.0–12.0 | ≤ 0.50 | — |
| A297 HH | 0.20–0.50 | ≤ 2.00 | ≤ 2.00 | ≤ 0.040 | ≤ 0.040 | 24.0–28.0 | 11.0–14.0 | ≤ 0.50 | — |
| A297 HI | 0.20–0.50 | ≤ 2.00 | ≤ 2.00 | ≤ 0.040 | ≤ 0.040 | 26.0–30.0 | 14.0–18.0 | ≤ 0.50 | — |
| A297 HK | 0.20–0.60 | ≤ 2.00 | ≤ 2.00 | ≤ 0.040 | ≤ 0.040 | 24.0–28.0 | 18.0–22.0 | ≤ 0.50 | — |
| A297 HL | 0.20–0.60 | ≤ 2.00 | ≤ 2.00 | ≤ 0.040 | ≤ 0.040 | 28.0–32.0 | 18.0–22.0 | ≤ 0.50 | — |
| A297 HN | 0.20–0.50 | ≤ 2.00 | ≤ 2.00 | ≤ 0.040 | ≤ 0.040 | 19.0–23.0 | 23.0–27.0 | ≤ 0.50 | — |
| A297 HP | 0.35–0.75 | ≤ 2.50 | ≤ 2.00 | ≤ 0.040 | ≤ 0.040 | 24.0–28.0 | 33.0–37.0 | ≤ 0.50 | — |
| A297 HT | 0.35–0.75 | ≤ 2.50 | ≤ 2.00 | ≤ 0.040 | ≤ 0.040 | 15.0–19.0 | 33.0–37.0 | ≤ 0.50 | — |
| A297 HU | 0.35–0.75 | ≤ 2.50 | ≤ 2.00 | ≤ 0.040 | ≤ 0.040 | 17.0–21.0 | 37.0–41.0 | ≤ 0.50 | — |
| A297 HW | 0.35–0.75 | ≤ 2.50 | ≤ 2.00 | ≤ 0.040 | ≤ 0.040 | 10.0–14.0 | 58.0–62.0 | ≤ 0.50 | — |
| A297 HX | 0.35–0.75 | ≤ 2.50 | ≤ 2.00 | ≤ 0.040 | ≤ 0.040 | 15.0–19.0 | 64.0–68.0 | ≤ 0.50 | — |
| A217 C12A — pressure | 0.08–0.12 | 0.20–0.50 | 0.30–0.60 | ≤ 0.025 | ≤ 0.010 | 8.0–9.5 | ≤ 0.40 | 0.85–1.05 | V 0.18–0.25; Nb 0.06–0.10; N 0.03–0.07; Al ≤ 0.020; Ti / Zr ≤ 0.010 each |
Includes all 14 traditional ASTM A297 grade designations referenced on this page, plus the separately identified ASTM A217 C12A pressure-casting grade. Published supplier reference values; modified/special grades require their own chemistry and full current specification. P91 is a pipe designation. ≤ = maximum; — = not stated, not zero.
Data references: HC · HD · HE · HF · HH · HI · HK · HL · HN · HP · HT · HU · HW · HX · C12A
Germany / Europe — EN 10295 Heat Resistant Castings
| Grade | C % | Si % | Mn % | P % | S % | Cr % | Ni % | Mo % | Other Elements % |
|---|---|---|---|---|---|---|---|---|---|
| GX25CrNiSi20-14 / 1.4832 | 0.15–0.35 | 0.50–2.50 | ≤ 2.00 | ≤ 0.040 | ≤ 0.030 | 19.0–21.0 | 13.0–15.0 | ≤ 0.50 | — |
| GX40CrNiSi25-12 / 1.4837 | 0.30–0.50 | 1.00–2.50 | ≤ 2.00 | ≤ 0.040 | ≤ 0.030 | 24.0–27.0 | 11.0–14.0 | ≤ 0.50 | — |
| GX40CrNiSi25-20 / 1.4848 | 0.30–0.50 | 1.00–2.50 | ≤ 2.00 | ≤ 0.040 | ≤ 0.030 | 24.0–27.0 | 19.0–22.0 | ≤ 0.50 | — |
| GX40CrNiSi27-4 / 1.4823 | 0.30–0.50 | 1.00–2.50 | ≤ 1.50 | ≤ 0.040 | ≤ 0.030 | 25.0–28.0 | 3.0–6.0 | ≤ 0.50 | — |
| GX40NiCrSi35-26 / 1.4857 | 0.30–0.50 | 1.00–2.50 | ≤ 2.00 | ≤ 0.040 | ≤ 0.030 | 24.0–27.0 | 33.0–36.0 | ≤ 0.50 | — |
| GX40NiCrSiNb35-26 / 1.4852 | 0.30–0.50 | 1.00–2.50 | ≤ 2.00 | ≤ 0.040 | ≤ 0.030 | 24.0–27.0 | 33.0–36.0 | ≤ 0.50 | Nb 0.80–1.80 |
| GX40CrSi28 / 1.4776 | 0.30–0.50 | 1.00–2.50 | ≤ 1.00 | ≤ 0.040 | ≤ 0.030 | 27.0–30.0 | ≤ 1.00 | ≤ 0.50 | — |
| GX130CrSi29 / 1.4777 | 1.20–1.40 | 1.00–2.50 | 0.50–1.00 | ≤ 0.035 | ≤ 0.030 | 27.0–30.0 | ≤ 1.00 | ≤ 0.50 | — |
| EN 10213 GX12CrMoVNbN9-1 — pressure | 0.10–0.14 | 0.20–0.50 | 0.30–0.80 | ≤ 0.020 | ≤ 0.010 | 8.0–9.5 | ≤ 0.40 | 0.85–1.05 | V 0.18–0.25; Nb 0.06–0.10; N 0.03–0.07; Al ≤ 0.020 |
Expanded EN 10295 reference families plus the separately labelled EN 10213 pressure-service grade. These designations are not certified equivalents to ASTM or IS grades. — means not stated here, not zero; other limits and the current agreed specification still apply.
Data references: EN 10295 references · Nb addition / ISO reference · EN 10213 amendment chemistry
China — Selected Heat Resistant Cast Alloy References
| Grade | C % | Si % | Mn % | P % | S % | Cr % | Ni % | Mo % | Other Elements % |
|---|---|---|---|---|---|---|---|---|---|
| ZG40Cr27Ni4 | 0.30–0.50 | 1.00–2.50 | ≤ 1.50 | ≤ 0.040 | ≤ 0.030 | 25.0–28.0 | 3.0–6.0 | ≤ 0.50 | — |
| ZG40Cr25Ni20Si2 | 0.30–0.50 | 1.00–2.50 | ≤ 2.00 | ≤ 0.040 | ≤ 0.030 | 24.0–27.0 | 19.0–22.0 | ≤ 0.50 | — |
Published manufacturer reference ranges, not a verified transcription of GB/T 8492-2024. Confirm the Chinese grade designation and limits against the edition specified in the purchase order. Reference values do not replace the applicable standard or a heat-specific material test certificate.
Data references: Manufacturer material table
Japan — JIS G 5122 Heat Resistant Cast Grades
| Grade | C % | Si % | Mn % | P % | S % | Cr % | Ni % | Mo % | Other Elements % |
|---|---|---|---|---|---|---|---|---|---|
| SCH13 | 0.20–0.50 | ≤ 2.00 | ≤ 2.00 | ≤ 0.040 | ≤ 0.040 | 24.0–28.0 | 11.0–14.0 | — | — |
| SCH13A | 0.25–0.50 | ≤ 1.75 | ≤ 2.50 | ≤ 0.040 | ≤ 0.040 | 23.0–26.0 | 12.0–14.0 | — | — |
| SCH21 | 0.25–0.35 | ≤ 1.75 | ≤ 1.50 | ≤ 0.040 | ≤ 0.040 | 23.0–27.0 | 19.0–22.0 | — | — |
Covers SCH13, SCH13A and SCH21, the Japanese grades identified in the standards section. Published supplier reference values. — means not stated in the reference, not zero. Check optional additions and the full JIS G 5122 requirements for the actual casting.
Data references: SCH13 / SCH13A catalogue · SCH21
PART 7 ───
OUR PRODUCTS & SUBPRODUCTS
Engineered Heat Resistant Components
for Industrial Thermal Processing
Explore heat resistant casting applications for furnace charging, heat treatment, radiant heating, combustion systems and industrial hot zones.
Product families are proposed catalogue applications. Share your drawing or sample to confirm BSCPL manufacturing capability and availability. Images are representative product illustrations.
01Furnace Trays, Baskets & Grids
Cast load carriers for arranging and containing workpieces during heat treatment and repeated heating/cooling cycles.
Subproducts
Material Options
Chromium-nickel heat-resistant cast grades selected for charge weight, temperature, atmosphere and thermal cycling.
02Radiant Tubes & Furnace Tubes
Hot-zone tube components and supports for industrial furnace heating systems, subject to the specified casting or fabrication route.
Subproducts
Manufacturing & Material Review
Manufacturing route, tube dimensions, welding and inspection requirements must be confirmed for each enquiry. Centrifugal casting or fabrication may be required.
03Furnace Rollers & Shafts
Cast hot-zone roller components for supporting and conveying work through suitable thermal-processing equipment.
Subproducts
Manufacturing & Material Review
Cast versus forged shaft construction, centrifugal casting, machining and balancing requirements to be agreed. Availability subject to technical review.
04Heat Treatment Fixtures & Supports
Positioning fixtures and charge-support components designed around the workpiece geometry, treatment cycle and furnace loading.
Subproducts
Material Options
IS 4522, ASTM A297 and EN 10295 alloy families selected for creep performance, atmosphere and thermal cycling.
05Burner & Combustion Components
Application-specific cast hot-zone parts for burner assemblies and industrial combustion systems.
Subproducts
Material Options
Heat-resistant grades selected for metal temperature, combustion atmosphere and thermal stress. Complete burner systems are outside this component listing.
06Furnace Grates, Hearth & Kiln Parts
Replaceable cast parts for furnace hearths, combustion zones and selected kiln or cooler applications.
Subproducts
Material Options
Chromium-bearing and chromium-nickel cast grades selected for temperature, oxidation, load and abrasive service.
07Retorts & Thermal Processing Parts
Cast thermal-processing components for containing or supporting furnace loads under defined temperature and atmosphere conditions.
Subproducts
Manufacturing & Material Review
Static casting, centrifugal casting or fabrication may be needed depending on geometry. Process route, leak testing and manufacturing feasibility to be confirmed.
08Custom Heat Resistant Castings
Drawing-based casting solutions for specialised equipment, replacement furnace parts and application-specific hot-zone components.
Subproducts
Enquiry Details
Send the drawing/sample, grade, weight, quantity, temperature, atmosphere and inspection requirements. Single castings up to 2,500 kg; capability confirmed per enquiry.
STEP-BY-STEP MANUFACTURING PROCESS
OUR MANUFACTURING PROCESS
From Alloy Selection to
Precision Heat Resistant Castings
Our manufacturing approach emphasizes appropriate material selection, controlled casting operations and application-specific inspection. The process sequence and acceptance requirements are selected for the alloy grade, casting geometry and purchase specification.
Requirement Analysis & Alloy Selection
Review operating temperature, service atmosphere, mechanical loads, drawings and application requirements to select the appropriate alloy.
Pattern Development & Casting Design
Develop or verify patterns with suitable shrinkage and machining allowances. Plan gating and feeding for the casting geometry.
Mould & Core Preparation
Prepare moulds and cores suitable for the required geometry, surface finish and dimensional tolerances. Check assembly before pouring.
Melting & Chemical Composition Control
Melt the selected charge and alloy additions. Verify chemistry against the specified grade and make permitted adjustments before pouring.
Molten Metal Pouring
Pour molten alloy into prepared moulds using appropriate temperature, handling and casting process controls.
Solidification, Cooling & Shakeout
Allow the casting to solidify and cool under the applicable production procedure, then remove the moulding and core material.
Fettling & Preliminary Finishing
Remove gates and risers as appropriate. Clean, grind and finish accessible surfaces, with preliminary visual checks.
Heat Treatment, Where Required
Apply heat treatment only where required by the alloy grade and purchase specification. Select the cycle for the casting section and intended service.
Machining & Dimensional Verification
Complete specified machining through machining partners and verify critical dimensions, tolerances and fit against the approved drawing.
Quality Inspection & Testing
Complete visual, dimensional and applicable material or non-destructive testing according to the grade, agreed inspection plan and acceptance criteria.
Final Finishing & Identification
Complete agreed surface finishing and final checks. Apply identification and maintain heat or batch traceability as specified.
Documentation, Packing & Dispatch
Prepare applicable inspection and material test records, protect the castings with suitable packing and arrange dispatch against the order requirements.
PART 9 ─────
MECHANICAL & PHYSICAL PROPERTIES
TYPICAL PROPERTIES OF
HEAT RESISTANT STEEL CASTINGS
Heat resistant steel castings are selected for their ability to maintain useful strength and dimensional stability at elevated temperatures. Properties depend on alloy composition, heat treatment, casting section and service conditions.
| PROPERTY | TYPICAL CHARACTERISTIC |
|---|---|
| Elevated-Temperature Tensile Strength | Ability to withstand tensile loads at the specified operating temperature. |
| Yield / Proof Strength | Resistance to permanent deformation under specified temperature and loading conditions. |
| Creep Resistance | Resistance to gradual deformation under sustained load at elevated temperatures. |
| Stress-Rupture Strength | Ability to withstand a specified stress for a defined time at elevated temperature. |
| Elongation / Ductility | Capacity for plastic deformation; varies with grade, temperature and service exposure. |
| Hardness | Depends on alloy composition, heat treatment and condition of supply. |
| Thermal Fatigue Resistance | Resistance to cracking caused by repeated heating and cooling cycles. |
| Density | Grade-dependent; used to calculate component weight. |
| Thermal Expansion | Dimensional change during heating; considered in clearances and support design. |
| Thermal Conductivity | Ability to transfer heat through the casting; varies with grade and temperature. |
| Specific Heat Capacity | Heat required to raise material temperature; influences heating and cooling response. |
| Elastic Modulus | Stiffness of the material; generally decreases as temperature rises. |
Numerical values should be stated for a specified alloy grade, test temperature and material condition. Room-temperature properties alone do not establish suitability for high-temperature service.
METALLURGICAL STRUCTURE
Microstructure of
Heat Resistant Castings
Microstructural Characteristics of Heat Resistant Alloys
Microstructure influences the thermal stability, creep resistance and mechanical performance of heat resistant castings. Alloy grade, casting condition and service history determine the structure present.
Illustrative microstructure visuals
Austenitic Matrix
Common in nickel-bearing chromium alloys, providing a matrix for useful ductility and elevated-temperature performance.
Carbide Distribution
Carbide size, shape and distribution influence high-temperature strength, creep behaviour and crack susceptibility.
Dendritic Solidification Structure
Solidification produces dendritic structures that influence segregation and subsequent material properties.
Thermal Exposure Effects
Prolonged high-temperature exposure can alter carbide morphology and other microstructural features.
Illustrative visuals; actual microstructure varies with alloy grade, casting condition and service history.
QUALITY ASSURANCE & INSPECTION
Quality Considerations
at Every Stage
A dependable heat resistant casting requires appropriate alloy chemistry, casting integrity and dimensional accuracy. Inspection also considers the specified material condition and the temperature, atmosphere and loading of the intended application.
A Systematic Approach to Reliable Castings
Inspection and testing verify conformity with the selected alloy grade, approved drawings and agreed acceptance criteria.
Chemical Analysis
Spectrometer analysis to verify chromium, nickel, carbon, silicon and other specified elements against the selected alloy grade.
Dimensional Inspection
Verification of critical dimensions, wall thickness, profiles and fitting requirements against approved drawings and tolerances.
Visual Inspection
Examination for visible cracks, surface porosity, misruns and other casting discontinuities against agreed acceptance criteria.
Mechanical & Hardness Testing
Hardness and tensile testing as specified. Elevated-temperature, creep or stress-rupture tests may be arranged when required by the order.
Non-Destructive Testing
Dye penetrant and suitable ultrasonic or radiographic examination where specified. Method selection depends on alloy structure, geometry and acceptance criteria.
Metallurgical Examination
Assessment of matrix phases, carbide distribution, grain structure and segregation where required. Review specified heat-treatment records when applicable.
Identification & Traceability
Heat or batch identification linked to chemistry, inspection results and applicable treatment records. Supply documentation as agreed in the order.
Inspection scope and acceptance criteria follow the applicable grade standard, approved drawing and purchase specification. Specialized testing and external laboratory arrangements are confirmed during enquiry review.
REQUEST FOR QUOTATION (RFQ)
Request a Quote for
Heat Resistant Steel Castings
Looking for furnace fixtures, trays, grate bars or other cast components for high-temperature service?
Share your technical requirements with Bhanu Special Castings. Include your drawing, preferred alloy grade, quantity, operating temperature and service atmosphere so our team can review your enquiry.
Share Your Requirements
Upload drawings or share technical details of your component.
Get Expert Support
Our team reviews your requirements and suggests suitable grades and options.
Application-Focused Quotations
Receive a detailed quotation based on your specifications and required quantity.
Reliable Partnership
Application-focused support for furnaces, heat treatment equipment and industrial thermal processing.
Important Note
Share the drawing, alloy grade, operating temperature, atmosphere, loading and inspection requirements. Our team will review your enquiry and contact you to discuss the quotation.
Submit Your Enquiry
Fill in the details below to request a quotation for heat resistant steel castings.