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420S45

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409S19 434S17
#420S45

Description

UK B.S. BS 1449-2, BS 1554, BS 2056, BS 5770-4, 420S45 Specialsteel Steel strip intended for the manufacture of springs. Specification for martensitic and austenitic stainless steel and Mechanical Properties, Chemical Element, Cross Reference, Datasheet.

Datasheet for: Steel Grades:Specialsteel: 420S45
Category Class Grade Standard Country Application
Steel GradesSpecialsteel 420S45 B.S. UK Steel strip intended for the manufacture of springs. Specification for martensitic and austenitic stainless steel

Chemical composition(mass fraction)(wt.%) of the 420S45

C Si Mn P S Cr Mo Ni
0.28 -0.36 ≤1.00 ≤1.00 ≤0.04 ≤0.03 12.00 -14.00 ≤ ≥ ≤1.00

Mechanical Properties of steel grade 420S45

Yield
Rp0.2 (MPa)		 Tensile
Rm (MPa)		 Impact
KV/Ku (J)		 Elongation
A (%)		 Reduction in cross section on fracture
Z (%)		 As-Heat-Treated Condition Brinell hardness (HBW)
743 (≥) 686 (≥) 21 12 41 Solution and Aging, Annealing, Ausaging, Q+T,etc 311

Physical Properties of steel grade 420S45

Temperature
(°C)		 Modulus of elasticity
(GPa)		 Mean coefficient of thermal expansion 10-6/(°C) between 20(°C) and Thermal conductivity
(W/m·°C)		 Specific thermal capacity
(J/kg·°C)		 Specific electrical resistivity
(Ω mm²/m)		 Density
(kg/dm³)		 Poisson’s coefficient, ν
42 - -     0.12 -  
538 334 - 43.3 234   -  
989 - 22 42.2   234 431

Heat Treatment of steel grade 420S45

Heat treated : 1248°C - 1765°C

Technological Curves of steel grade 420S45

Cross Reference Table (Equivalent Grade) of 420S45

Grade Standard Country Application
420S45
420S45

Relevant standard of 420S45

BS 1449-2 Steel plate, sheet and strip. Specification for stainless and heat-resisting steel plate, sheet and strip BS-1449-2.pdf
BS 1554 Specification for stainless and heat-resisting steel round wire BS-1554.pdf
BS 2056 Specification for stainless steel wire for mechanical springs BS-2056.pdf
BS 5770-4 Steel strip intended for the manufacture of springs. Specification for martensitic and austenitic stainless steel BS-5770-4.pdf
409S19 434S17
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Jiangyou Longhai Special Steel Co.,Ltd.
Jiangyou Longhai Special Steel Co.,Ltd.

Our main peoducts of steel are many kinds of special steel, like tool steel, mould steel, alloy steel, alloy constructural steel, heat-resistant steel, high speed tool steel,spring steel and bearing steel , stainless steel and so on, which have formed 12 series and more than 350 varieties with n...

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