GX130CrSi29 Casting
GX130CrSi29 casting (material no. 1.4777, old DIN designation G-X 130 CrSi 29) is a high-chromium heat resistant cast steel to EN 10295. With 27-30% chromium and 1.2-1.4% carbon it resists scaling up to 1100°C in air, while chromium carbides give extreme wear resistance – which is why the GX130CrSi29 casting is a first choice for furnace grate bars, annealing retorts, burner drums and other low-load, high-abrasion furnace parts.
Chemical Composition and Key Properties
Chemical composition of GX130CrSi29 / 1.4777 (EN 10295, % by weight):
| C | Si | Mn | Cr | Ni | Mo | P | S |
|---|---|---|---|---|---|---|---|
| 1.2-1.4 | 1.0-2.5 | 0.5-1.0 | 27-30 | ≤1.0 | ≤0.5 | ≤0.035 | ≤0.030 |
Key data: density 7.6 g/cm³; maximum service temperature 1100°C in oxidizing atmosphere and 1050°C in reducing atmosphere (EN 10295); soft annealing at 800-850°C available on request.
International Standards Comparison – Equivalent Grades
International equivalents for the 1.4777 heat resistant casting across European, American, Australian, Chinese and other standards:
| Region / Standard | Equivalent Grade | Comparison Notes |
|---|---|---|
| Europe – EN 10295:2002 (formerly DIN 17465:1993) | GX130CrSi29 (1.4777) | Base grade: C 1.2-1.4%, Cr 27-30%; rated 1100°C in air |
| China – GB/T 8492-2014 | ZGCr29Si2 | Compositionally identical (C 1.2-1.4%, Cr 27-30%); rated 1100°C; annealed at 800-850°C |
| USA – ASTM A297/A297M | Grade HC (UNS J92605) – closest | 28Cr-type, Cr 26-30%, but C ≤0.50% – much lower carbon, not directly interchangeable |
| Australia – AS 2074 | Grade H4A – closest | Cr 26.0-30.0%, Si ≤2.0%, but C ≤0.50% and Ni ≤0.50%; order to technical agreement |
| International – ISO 11973 | GX130CrSi29 | Same designation in the ISO system |
| Japan – JIS G 5122 | SCH6 – approximate | Listed as counterpart in steel cross-reference handbooks |
Notes: GX130CrSi29 (EN 10295) and ZGCr29Si2 (GB/T 8492-2014) are compositionally identical. ASTM A297 HC and AS 2074 H4A share the 26-30% chromium band but limit carbon to 0.50% – they are the closest listed grades, not interchangeable equivalents. Any cross-standard substitution should be approved by engineering review.
Typical Applications
- Furnace grate bars and grate plates for burning systems
- Annealing retorts and hearth plates
- Burner drums and burner nozzles
- Agitator arms and agitator teeth for pyrite roasting furnaces
- Slide bars, chutes and feed racks
- Kiln protection rings and boiler parts
Custom Casting Capability
As a China casting foundry we supply custom GX130CrSi29 castings by sand casting, investment casting and lost foam casting, from small wear parts to heavy furnace castings. We machine to your drawings, soft-anneal at 800-850°C on request, and deliver every GX130CrSi29 casting with EN 10295 / GB/T 8492-2014 material certificate.
FAQ
What is the Chinese equivalent of GX130CrSi29 casting?
ZGCr29Si2 under GB/T 8492-2014 (Heat-Resistant Steel and Alloy Castings for General Applications). Its chemistry is identical – C 1.2-1.4%, Si 1.0-2.5%, Cr 27-30% – so castings can be accepted against either standard.
Is there a US ASTM equivalent grade?
There is no exact equivalent. ASTM A297 grade HC (UNS J92605) is the closest – a 28Cr-type heat resistant casting – but its carbon is limited to 0.50%, far below the 1.2-1.4% in GX130CrSi29, so treat it as a comparison grade only.
Can you produce to customer requirements?
Yes. Send your drawings or samples; we quote per part, machine to print and ship with material certificate, including 800-850°C annealing when required.
