420 Stainless Steel Hex Nuts | ISO 3506-1 UNS S42000 Specifications

420 Stainless Steel Hex Nuts

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

420 Stainless Steel Nuts are martensitic stainless steel nuts manufactured from alloy containing chromium and nickel. Stainless Steel 420 Nuts are used for corrosive environments. TorqBolt is an eminent 420 stainless steel nuts supplier in India.

Related Products

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

420 Stainless Steel Hex Nuts Properties

420 Stainless Steel Hex Nuts 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 Hex Nuts 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 Hex Nuts 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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