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BS DIN EN 1.4021 stainless Steel Fasteners | UNS S42000
  • Bolting Specifications
  • Fasteners
  • Werkstoff 1.4021 Stainless Steel Fasteners

    • Werkstoff 1.4021 Stainless Steel Fasteners

    420S37, BS2303, 1.4021, 420J1, S42000, X20CR13

    1.4021 Fasteners are classified under Stainless Steel. Werkstoff 1.4021 Fasteners are internationally known as fasteners manufactured from 420 Stainless Steel.

    Related Products

    420 SS Bolts 420 SS Fasteners 420 SS Forgings 420 Stainless Steel Nuts SS 420 Screws 420 SS Threaded Rod 420 Stainless Washers 1.4021 Bolts

    Werkstoff 1.4021 Stainless Steel Fasteners Properties

    Werkstoff 1.4021 Stainless Steel Fasteners 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

    Werkstoff 1.4021 Stainless Steel Fasteners 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

    Werkstoff 1.4021 Stainless Steel Fasteners 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

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