A2 70 Stainless Steel Bolts
304S31, BS2332, 1.4301, 304, S30400, X5CRNI18-10
A2 70 Bolts are manufactured from 304 Stainless Steel in accordance with EN 3506 specification. Torqbolt is a prominent A2 70 Bolt supplier in India.
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A2 70 Stainless Steel Bolts Properties
A2 70 Stainless Steel Bolts Common Designations for cold heading
| Type Of Steel/Alloy | Grade | Steel Number | Steel Designation | UNS | Trade Name |
|---|---|---|---|---|---|
| General purpose austenitic | A2 | 1.4301 | X5CrNi18-10 | S30400 | 304 |
A2 70 Stainless Steel Bolts Chemical Requirements
| Stainless steel grade | Chemical composition a (cast analysis, mass fractionin %) b | Other elements and notes | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| C | Si | Mn | P | S | Cr | Mo | Ni | Cu | N | |||
| Austenitic | A2 | 0,10 | 1,00 | 2,00 | 0,050 | 0,030 | 15,0 to 20,0 | _ f | 8,0 to 19,0 | 4,0 | - | g,h |
A2 70 Stainless Steel Bolts Mechanical Requirements
Mechanical properties (Austenitic and Duplex Steel)
| Stainless steel grade | Property class | Tensile strength a Rmf min. MPa | Stress at 0,2 % non-proportional elongation b Rpf mm. MPa | Elongation after fracture A min. mm | |
|---|---|---|---|---|---|
| Austenitic | A2 | 70 | 700 | 450 | 0,4d |
Applicability of tests for fasteners with full loadability
| Stainless steel grade | Property and related test method | |||||
|---|---|---|---|---|---|---|
| Minimum tensile strength Rmr | Stress at 0,2 % non-proportional elongation Rpf | Elongation after fracture A | Minimum breaking torque M B | Hardness | ||
| Tensile test 9.1 | Wedge tensile test 9.4 | Tensile test 9.1 | Tensile test 9.1 | Torsional test 9.5 | Hardness test 9.6 | |
| A2 | d ≥ 3 mm I ≥ 2,Sd b ≥ 2d | Not relevant | d ≥ 3 mm I ≥ 2,Sd b ≥ 2d | d ≥ 3 mm I ≥ 2,Sd b ≥ 2 d | For all lengths when d < 3 mm; only for lengths I < 2,Sd when d ≥ 3 mm b ≥ ld + 2 P No value available for property class 100 or for fine pitch thread | Not applicable |
Applicability of tests for fasteners with reduced loadability
| Stainless steel grade | Property and related test method | ||||
|---|---|---|---|---|---|
| Minimum tensile strength Rmr | Stress at 0,2 % non-proportional elongation Rpf | Elongation after fracture A | Minimum tensile load Fmr | Hardness | |
| Tensile test 9.1, 9.3 | Tensile test 9.1 | Tensile test 9.1 | Tensile test 9.2 | Hardness test 9.6 | |
| A2 | d ≥ 3 mm for all lengths, when b ≥ 3d a | d ≥ 3 mm for all lengths | Not applicable | ||