Shanghai Jieteng Precision Mold Factory

Shanghai Jingteng Metal Group Co., Ltd.

   
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SCM440

SCM440

SCM440 Structural Alloy Steel
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SCM440 Structural Alloy Steel



Material Name


Material Name: SCM440

Characteristics and scope of application


It is the production of high strength fasteners commonly used steel, the product has stable elements, harmful elements are low, the purity of steel is high, decarburization small, surface defects is little wait for an advantage, use easy spheroidizing annealing, cold heading cracking rate low, heat treatment, quality is stable and uniform hardness. It is widely used in the engine, die and mould industry.


Chemical Composition


C Si Mn Mo
 S P Cr Ni Cu
0.38-0.43
 0.15-0.35 0.60~0.85 0.15-0.30
 Max 0.03 Max 0.03
 Max 0.25 Max 0.25 Max 0.30

Mechanical Property


Tensile strength
σb (MPa) 		Yield Strength
σs 0.2 (MPa)
Elongation
δ 5 (％)
reduction of crosssection area
ψ (％)
Hardness
(HB)
specimen size
Min 1080 Min 930 Min 12 Min 45
   Max 217 25mm

specification of heat treatment and metallurgical structure


Specification of heat treatment : 880℃ 1h, oil hardening, 650-680℃, 2h tempering, air cooling.
Metallurgical Structure: tempered martensite

Delivery State


Heat treatment (normalizing, annealing or high temperature tempering) or non heat treatment state of delivery, the delivery state should be indicated in the contract.