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About Stainless Steel Alloys
Stainless steel alloys are austenitic, ferritic, martensitic, precipitation hardened, and duplex metals that are available in a wide variety of grades, shapes, and sizes. Austenitic stainless steels have excellent corrosion resistance, unusually good formability, and increased strength due to cold working. They are non-magnetic or only slightly magnetic. Two hundred (200) series austenitic stainless steels contain chromium, nickel, and manganese. Three hundred (300) series austenitic stainless steels contain chromium and nickel. Ferritic stainless steels are straight-chromium, 400 series metals that cannot be hardened by heat treatment, and only moderately hardened by cold working. They are magnetic, have good ductility, and resist corrosion and oxidation. Martensitic stainless steels, another type of straight-chromium 400 series metals, are magnetic, fairly ductile, and resist corrosion in mild environments. Some products can be heated to tensile strengths that exceed 200,000 psi (1379 MPa). Precipitation hardened (PH) stainless steels are chromium-nickel metals, some of which contain alloying elements such as copper or aluminum. They can be hardened by solution treating and aged to high strength. Duplex stainless steel alloys have improved mechanical properties and consist of a combination of ferritic and austenitic phases.
Many stainless steel alloys meet the compositional standards of the Unified Numbering System (UNS), a specification established by the American Society for Testing and Materials (ASTM), the Society of Automotive Engineers (SAE), and metal trade associations such as the American Iron and Steel Institute (AISI). The UNS assigns metals and alloys a lettered prefix and a five-digit number. Stainless steel alloys belong to the UNS S category and have designations such as UNS S20100. AISI grades are another common specification for stainless steel alloys. Other standards include casting grades, European Norm (EN), American Society of Mechanical Engineers (ASME) standards, and U.S. military specifications (MIL-SPEC). QQ and QQS prefixes are used to designate specific MIL-SPEC metals. Grades with low carbon levels (L or S grades) provide improved weldability and corrosion resistance. Grades that contain superalloys, tool steels, clad or bimetal materials, or that feature a metal matrix composite are also available.
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Engineering Web: Stainless Steel Alloys
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Part Numbers for Stainless Steel Alloys
| Part # | Distributor | Manufacturer | Product Category | Description |
|---|---|---|---|---|
| 77164 | Amazon | Permatex | Automotive Parts and Accessories | Permatex 77164 Nickel Anti-Seize, 16 oz Brush-Top Bottle |
| 77124 | Amazon | Permatex | Automotive Parts and Accessories | Permatex 77124 Nickel Anti-Seize, 8 oz Brush-Top Bottle |
| 0221576 | Amazon | Troemner | Industrial & Scientific | Troemner Alloy 8 Stainless Steel Individual Precision Weights - UltraClass; Mass: 200g |
| SS14GA2B-1x10 | Amazon | The Metal Store | Industrial & Scientific | Stainless Steel - Sheets (Mill Finish) - Alloy - 304 - 14ga. x 1x10' |
| SS14GA2B-2x12 | Amazon | The Metal Store | Industrial & Scientific | Stainless Steel - Sheets (Mill Finish) - Alloy - 304 - 14ga. x 2x12' |
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