Hardness testing to ISO 6508-1
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Stainless Steel 321 Eye Bolts as per DIN 580 are a specific type of fastener designed for various lifting and anchoring applications. These eye bolts are made from Stainless Steel 321, which is a heat-resistant and corrosion-resistant stainless steel alloy. Here are some key features, applications, and heat treatment information for these eye bolts:
Features:
Applications:
Stainless Steel 321 Eye Bolts, as per DIN 580, are commonly used in various lifting and anchoring applications, including:
Specifications | ASTM F593, A193 / ASME SA193 |
Standard | DIN, ISO, JIS, GB, IS, BS, ASTM and all International Standards |
Eye Bolt Size |
|
Length | 3 mm - 200 mm | Custom Sizes |
Threads | METRIC, BSW, BSF, UNC, UNF or as required |
DIN Standard | B.S. DIN 933, DIN 931, DIN 934, DIN 912, DIN 603, DIN 6923, DIN 970, DIN 7981, DIN 7982, DIN916, DIN 913, DIN 7985 |
UTS | UNC, UNF, UNEF, UNS, NPT, NPTF |
Dimensions | ASME B18.6.3 **Exception: screws 6 inches and shorter are fully threaded. |
ISO | ISO 4032, ISO 4033, ISO 4017, ISO7380 JIS standards |
Surface treatment | Passivation, Polish, Anodizing, Sand blasting, Black oxide coating, Heat-disposing, Rust preventive oil, Hot dip galvanized Eye Bolts, Electroplating (color, blue, white, black zinc, Ni, Cr, tin, copper, silver). |
Heat Treatment:
Stainless Steel 321, as an alloy, undergoes a specific heat treatment process to optimize its properties, including its heat resistance and corrosion resistance. The heat treatment typically involves annealing, which helps to reduce the risk of intergranular corrosion and enhances the material's high-temperature strength. The specific heat treatment process may include:
Annealing:
This process involves heating the material to a specific temperature range and then slowly cooling it. Annealing helps to reduce the risk of sensitization, a condition where chromium carbides can form along the grain boundaries, making the material susceptible to corrosion. By stabilizing the alloy, Stainless Steel 321 is made more suitable for high-temperature and corrosive environments.
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Grade | UNS No | Old British | Euronorm | Swedish SS | Japanese JIS | ||
BS | En | No | Name | ||||
321 | S32100 | 321S31 | 58B, 58C | 1.4541 | X6CrNiTi18-10 | 2337 | SUS 321 |
Grade | Mn | N | P | C | S | Cr | Mo | Si | Ni | Other | |
321 | min. max | 2.00 | 0.10 | 0.045 | - 0.08 | 0.030 | 17.0 19.0 | - | 0.75 | 9.0 12.0 | Ti=5(C+N) 0.70 |
Grade | Tensile Strength (MPa) min | Yield Strength 0.2% Proof (MPa) min | Elongation (% in 50mm) min | Hardness | |
Rockwell B (HR B) max | Brinell (HB) max | ||||
321 | 515 | 205 | 40 | 95 | 217 |
Hardness testing to ISO 6508-1
Nut proof load testing to ISO 898-2
Suitability for preloading to EN 14399-2
Calibrated gauges and tools
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