Shanghai Jieteng Precision Mold Factory

Shanghai Jingteng Metal Group Co., Ltd.

   
Product
Article
Search
NameDescriptionContent
Product center
  
  
  
location：
HOME ≡ Special Steel ≡ Alloy Steel ≡ ​ Japanese Standard Alloy Steel​ ≡ SCM420 4120(H) 20CrMo4 Alloy Steel
PRODUCT CENTER
Contact us
SCM420 4120(H) 20CrMo4 Alloy Steel

SCM420 4120(H) 20CrMo4 Alloy Steel

SCM420 4120(H) 20CrMo4 Alloy Steel

￥ 0.00
0.00
Thickness：
Diameter：
  

SCM420 4120(H) 20CrMo4 Alloy Steel




Material Name


Material Name: SCM420 4120(H) 20CrMo4 Alloy Steel

Characteristics and scope of application


Hardened high, no temper brittleness, good welding properties, the formation of cold cracking tendency is very small, machinability and cold strain plasticity is good.
Used in the manufacture of non corrosive medium and operating temperature below 250 degrees Celsius, containing nitrogen and hydrogen mixture in the medium of high pressure pipe and a variety of fasteners, the more advanced carburizing parts, such as gear, shaft, etc.


Chemical Composition


C Si Mn Mo
 S P Cr Ni Cu
0.18-0.23
 0.15-0.35 0.60~0.90 0.15-0.25
 Max 0.03 Max 0.03
 0.90-1.20 Max 0.25 Max 0.30

Mechanical Property


Tensile strength
σb (MPa) 		pounding toughness value
αkv (J/cm2)
Elongation
δ 5 (％)
ballistic work
Akv (J)
 pounding toughness value
αkv (J/cm2)
 specimen size
reduction of crosssection area
ψ (％)
Hardness
(HB)
Min 885 Min 685 Min 12 Min 78
 Min 98
 15mm
 Min 50
   Max 197

specification of heat treatment and metallurgical structure


Specification of heat treatment : hardening 880℃ water cooling, oil cooling; tempering 500℃ water cooling, oil cooling.

Delivery State


In the heat treatment (quenching, annealing or tempering) or heat treatment delivery, delivery status should be indicated in the contract.