304/316/316L/310/321/347 Stainless Steel
Precision-Engineered Flanges for Diverse Industrial Applications
SSM manufactures high-performance stainless steel flanges in all major grades, each optimized for specific service conditions. Our expertise in metallurgy ensures the right material solution for your piping system requirements.
Material Specifications & Applications
1. Austenitic Stainless Steels
304/304L (A182 F304/F304L)
Composition: 18% Cr, 8% Ni
Key Properties:
Excellent general corrosion resistance
Good formability and weldability
Cost-effective solution
Temperature Range: -425°F to 1500°F (-254°C to 816°C)
Typical Applications: Food processing, water systems, architectural
316/316L (A182 F316/F316L)
Composition: 16% Cr, 10% Ni, 2% Mo
Key Properties:
Superior chloride resistance
Enhanced acid resistance
Better high-temperature strength
Temperature Range: -425°F to 1500°F (-254°C to 816°C)
Typical Applications: Chemical processing, marine, pharmaceutical
310 (A182 F310)
Composition: 25% Cr, 20% Ni
Key Properties:
Exceptional oxidation resistance
Excellent high-temperature strength
Good carburization resistance
Temperature Range: Up to 2100°F (1149°C)
Typical Applications: Furnace parts, heat treatment equipment
2. Stabilized Austenitic Grades
321 (A182 F321)
Composition: 18% Cr, 10% Ni, Ti stabilized
Key Properties:
Resists intergranular corrosion
Good high-temperature strength
Excellent weldability
Temperature Range: -425°F to 1500°F (-254°C to 816°C)
Typical Applications: Aircraft exhaust, pressure vessels
347 (A182 F347)
Composition: 18% Cr, 11% Ni, Nb stabilized
Key Properties:
Superior intergranular corrosion resistance
Excellent high-temperature properties
Good weldability
Temperature Range: -425°F to 1500°F (-254°C to 816°C)
Typical Applications: High-temperature piping, chemical reactors
Material Selection Guide
| Service Condition | Recommended Grade |
|---|---|
| General corrosion | 304/304L |
| Chloride environments | 316/316L |
| High-temperature oxidation | 310 |
| Welded construction | 316L/347 |
| Sour service | 316L with NACE compliance |
| Acidic environments | 316/317L |
| Thermal cycling | 321/347 |
Manufacturing Capabilities
Grade-Specific Processing
304/316 Series: Standard solution annealing
321/347: Stabilization heat treatment
310: Special high-temperature annealing
All Grades: Pickling & passivation available
Quality Assurance
Material Certification: ASTM A182 compliance
PMI Testing: All alloying elements verified
Mechanical Testing: Tensile, yield, elongation
Corrosion Testing: ASTM G48, A262
Microstructure Examination: Grain size assessment
Why Choose SSM for Specialty Flanges?
✔ Full Range of Stainless Steel Grades
✔ Material-Specific Heat Treatment
✔ Technical Support for Material Selection
✔ Competitive Pricing Across All Grades
✔ Global Certifications Including PED, NACE
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