321 High Temperature Exhaust Manifold Castings
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321 High Temperature Exhaust Manifold Castings
Product Name: 321 High-Temperature Exhaust Manifold Castings
(Shandong Hongyang Special Steel - Turbocharged Performance Solutions)
Product Overview
Our ZG10Cr18Ni9Ti (321 Stainless Steel) exhaust manifolds are engineered for extreme thermal cycling in turbocharged applications. With titanium-stabilized austenitic structure, these castings withstand continuous 900°C operation while resisting oxidation and thermal fatigue better than standard 304 manifolds.
Key Advantages
1. Unmatched Thermal Durability
Operating range: -40°C to 900°C (short peaks to 950°C)
Cyclic resistance: 5,000+ thermal shock cycles (20°C↔800°C)
Oxidation resistance: <0.5mg/cm² weight gain after 100h at 900°C
2. Precision Engineered Design
Wall thickness optimization: 3-8mm uniform sections for weight reduction
As-cast surface finish: Ra≤12.5μm (improved exhaust flow)
Integrated features: Flange bosses, sensor mounts, and reinforcement ribs
3. Proven Performance
Creep strength: 35MPa at 800°C (1000h rupture life)
Thermal expansion: 18.5×10⁻⁶/°C (20-800°C) matches turbine housings
Weldability: Compatible with ER321 filler for repairs/modifications
Technical Specifications
|
Parameter |
Value |
Standard |
|
Composition |
Cr:17-19%, Ni:9-12%, Ti:5xC% |
ASTM A743 |
|
High-Temp Strength |
120MPa @ 800°C |
ISO 204 |
|
Surface Condition |
As-cast or Machined |
Customer Spec |
|
Dimensional Accuracy |
CT6-Casting Tolerance |
ISO 8062 |
Manufacturing Process
Precision casting: Lost-wax investment casting for complex geometries
Heat treatment: Solution annealing at 1050°C with rapid quench
Quality control
100% Dye Penetrant Inspection (ASTM E165)
Sample metallurgical testing per ASTM E3
Pressure testing optional (air/water)
Application Scenarios
Performance vehicles: Turbocharged gasoline/diesel applications
Marine engines: High-load diesel exhaust systems
Industrial turbines: Waste heat recovery units
Aftermarket upgrades: Direct replacement for cracked OEM manifolds
Why Choose Our Manifolds?
✔ Material superiority: Titanium stabilization prevents sensitization
✔ Proven designs: CFD-optimized runner geometries
✔ Rapid prototyping: 3D-printed patterns available
✔ Competitive lead times: 30 days for samples, 60 days production
Enhanced Options:
• Ceramic coating compatibility
• Machined flange faces (Ra3.2)
• Custom alloy modifications (Ti/Nb adjustments)
Quality Documentation
• Material Test Certificates per EN 10204 3.1
• First-article inspection reports
• PPAP documentation available
FAQ
Q: What are your core products?
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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