AMS 5510 is the authoritative aerospace specification governing solution heat-treated 321 stainless steel (UNS S32100 / 1.4541 / AISI 321), covering corrosion and heat-resistant sheet, strip, and plate products. Chemically composed of 18% chromium, 10.5% nickel and titanium stabilization (SAE 30321), this alloy is a premium titanium-stabilized austenitic stainless steel developed to solve intergranular corrosion issues caused by welding and high-temperature thermal cycling. As a professional and reliable China stainless steel supplier,ZYTC Alloy provides fully AMS 5510 compliant 321 stainless steel sheets, strips and plates with standardized solution heat treatment. We maintain abundant spot inventory and complete certification support to serve global aerospace, petrochemical and high-temperature industrial projects with stable and consistent material quality. |  |
Chemical Composition | | Weight% | C | Si | Mn | P+S | Cr | Ni | Ti | N | Fe | Cu | Mo | AMS 5510
Alloy 321 | 0.08 max | 0.25-1.00 | 2.0 max | 0.040P
0.030S | 17-19 | 9-12 | 0.7 max | 0.1 max | Bal | 0.75 max | 0.75 max |
Typical Mechanical PropertiesMaterial | Condition | Tensile Strength (ksi) | Yield Strength (ksi) | % Elongation | Hardness HB | Alloy 321
AMS 5510 | AMS 5510 Sheet (Sol Trtd) | 70-100 | 25 | 40 | - |
Physical Property | Metric | Imperial |
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| Density | 8.09 g/cm³ | 0.290 lb/in³ | | Modulus of Elasticity | 193 GPa | 28.0 × 10³ ksi | | Coefficient of Expansion (32-1500°F) | 20.2 µm/m·°C | 11.2 µin/in·°F | | Thermal Conductivity (212°F) | 16.0 W/m·°C | 111 BTU·in/ft²·hr·°F |
Product Forms & Availability – 321 Stainless Steel (UNS S32100)ZYTC Alloy's 321 stainless steel products strictly comply with global aerospace, industrial and ASME standards, supporting multi-scenario engineering design and procurement requirements: AMS Aerospace StandardsAMS 5510 (Sheet/Strip/Plate), AMS 5557 (Welded/Seamless Tube), AMS 5559 (Thin Wall Tube), AMS 5570 (Seamless Tube), AMS 5576 (Welded Tube), AMS 5645 (Bar/Wire/Forging) ASTM / ASME Industrial StandardsASTM A240/SA240, ASTM A167/SA167, ASTM A193 B8T CL1, ASTM A276/SA276, ASTM A314/SA314, ASTM A320 B8T, ASTM A479/A484 Grade DesignationsUNS S32100, AISI 321, W.Nr 1.4541, Z10CnNb18-11
ApplicationsThanks to its outstanding welding stability and high-temperature corrosion resistance, AMS 5510 321 stainless steel is widely used in key equipment that cannot be post-weld heat treated and requires long-term high-temperature operation: Aerospace Industry: Aircraft exhaust components, jet engine parts, heat collecting rings and high-temperature structural parts Petrochemical & Energy: High-temperature heat exchangers, reaction vessels, pyrolysis piping and thermal processing equipment Industrial Thermal Equipment: Boiler components, furnace baffles, high-temperature pipelines and pressure vessels General Industrial Manufacturing: Welded structural parts, high-temperature fasteners and flexible metal hose components
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