High Temperature Alloy Steel Valve Castings
High-Temperature Alloy Steel Valve Castings
Product Overview
Specializing in high-temperature valve castings (538°C~1200°C) for petroleum, power, and metallurgy industries. Manufactured to API/ASTM/GB standards with precision casting technologies.
Material Grades (Global Standards)
|
China GB |
ASTM |
EN |
Temp Range |
Characteristics |
|
ZG40Cr25Ni20 |
A297 HK |
1.4848 |
≤1150°C |
General purpose |
|
ZG40Cr30Ni20 |
A297 HT |
1.4859 |
≤1200°C |
High Cr content |
|
ZG45Ni35Cr26 |
A297 HP |
1.4852 |
≤1150°C |
Ni-rich alloy |
|
ZG30Cr26Ni12 |
A217 C12 |
1.4837 |
≤1000°C |
Cost-effective |
Product Series
▸ Gate/Globe Valves:
Body/Cover: ZG40Cr25Ni20 (ASTM A297 HK)
Disc/Seat: ZG40Cr30Ni20Nb (Nb-enhanced)
▸ Ball/Butterfly Valves:
Body: ZG45Ni35Cr26 (ASTM A297 HP)
Ball/Stem: ZG50Ni35Cr25W5 (W-strengthened)
▸ Special Applications:
Hydrogenation valves: ZG10Cr9Mo1VNb (ASTM A182 F91)
Coal gasification valves: ZG40Cr28Ni48W5 (Co-based overlay)
Technical Advantages
✔ High-Temperature Performance:
1100°C tensile strength ≥60MPa
Oxidation rate ≤2g/m²·h (1000°C×100h)
Thermal fatigue cycles ≥500 (1000°C↔WQ)
✔ Precision Casting:
Dimensional accuracy CT7-9
Min. wall thickness 5mm
Surface finish Ra12.5μm (machinable to Ra3.2)
✔ Special Treatments:
Seal face plasma welding (Stellite 6/12)
Anti-coking internal coating
HVOF thermal spraying
Quality Assurance
Material Certification:
✓ Spectrometry reports
✓ Elevated temperature tests
✓ IGC examination (ASTM A262)
NDT:
✓ 100% RT (EN 12517-2 Class B)
✓ PT (ASTM E165 Level 1)
Functional Tests:
✓ Gas pressure test (1.5×rated)
✓ High-temp sealing (API 598)
Applications
✓ Refinery hydroprocessing valves
✓ Supercritical boiler control valves
✓ Ethylene cracking furnace valves
✓ Coal gasification lock-hopper valves
✓ Metallurgical flue gas valves
Custom Services
Application-Oriented Design:
Material selection guidance
Thermal stress analysis
Seal pair matching
Special Requirements:
Hydrogen embrittlement protection (NACE)
Cryogenic toughness (-196°C)
Nuclear certification (ASME III)
Certifications
✓ API 600/602/6D
✓ PED 2014/68/EU
✓ NACE MR0175/ISO 15156
✓ TA-Luft compliance
Note:
Pattern development within 3 weeks
Prototype delivery in 6-8 weeks
Full material traceability
On-site technical support available
FAQ
Q: What are your core products?
A: Heat-resistant steel castings, stainless steel castings, and customized alloy components.
Q: What industries do your products serve?
Q: Do you offer custom-designed components?
Q: Are your products suitable for high-temperature environments?
Q: Do you manufacture stainless steel stamping parts?
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