420 Stainless Steel Screws
420S37, BS2303, 1.4021, 420J1, S42000, X20CR13
420 Stainless Steel Screws are martensitic stainless steel screw manufactured from alloy containing chromium and nickel. Stainless Steel 420 Set Screw are used for corrosive environments. TorqBolt is an eminent 420 stainless steel screw supplier in India.
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420 Stainless Steel Bolting 420 Stainless Steel Bolts And Nuts SS 420 Forgings 420 Stainless Steel Nuts 420 SS Screws Type 420 Stainless Threaded Rod 420 SS Washers 1.4021 Bolts
420 Stainless Steel Screws Properties
420 Stainless Steel Screws Common Designations for cold heading
| Type Of Steel/Alloy | Grade | Steel Number | Steel Designation | UNS | Trade Name |
|---|---|---|---|---|---|
| General purpose martensitic | C1 | 1.4021 | X20Cr13 | S42000 | 420 |
420 Stainless Steel Screws 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 | |||
| Martensitic | C1 | 0,09 to 0,15 | 1,00 | 1,00 | 0,050 | 0,030 | 11,5 to 14,0 | - | 1,00 | - | - | i |
420 Stainless Steel Screws Mechanical Requirements
Mechanical properties (Martensitic and Ferritic Steel)
| Stainless steel grade | Property class | Tensile strength a Rmr min. MPa | Stress at 0,2 % non-proportional elongation b Rpr mm. MPa | Elongation after fracture A min. mm | Hardness min. to max. | |||
|---|---|---|---|---|---|---|---|---|
| HV | HRC | HBW | ||||||
| Martensitic | C1 | 50 | 500 | 250 | 0,2d | 155 to 220 | - | 147 to 209 |
| 70 | 700 | 410 | 0,2d | 220 to 330 | 20 to 34 | 209 to 314 | ||
| 110 c | 1100 | 820 | 0,2d | 350 to 440 | 36 to 45 | - | ||
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 | |
| C1 | d ≥ 3 mm I ≥ 2,Sd b ≥ 2d | d ≥ 3 mm I ≥ 2,Sd b ≥ 2d | d ≥ 3 mm I ≥ 2,Sd b ≥ 2d | d ≥ 3 mm I ≥ 2,Sd b ≥ 2d | No value available | 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 | |
| C1 C3 C4 | d ≥ 3 mm for all lengths, when b ≥ 3d a | d ≥ 3 mm for all lengths | Applicable | ||