SCM420 alloy steel pipe harden ability is higher, no temper brittleness, weld
ability is quite good, form the cold cracking tendency is small, can be good
mability and cold plastic strain.
Characteristics and application:
SCM420 seamless pipe in conditioning or carburizing and quenching condition,
used in the manufacture of the corrosive medium and working temperature below
250 ℃, the medium containing hydrogen nitrogen mixture work of high pressure
pipe and all kinds of fasteners, the more senior carburized parts, such as gear,
shaft, etc.
Chemical composition and mechanical properties
|
|
Chemical composition (%)
|
|
C
|
Si
|
Mn
|
P
|
S
|
Cr
|
Mo
|
|
0.18-0.23
|
0.15-0.35
|
0.60-0.85
|
0.030max
|
0.030max
|
0.90-1.20
|
0.15-0.30
|
|
Yield Strength
Mpa (min)
|
Tensile Strength
Mpa(min)
|
Elogation
%(min)
|
|
835
|
685
|
12
|
Standard :JIS G 4105
Equivalent material: 20CrMo , 25CrMo4 (1.7218), 40CrNiMoA , 4340 , 817M40
,816M40
Percentage reduction of area : ≥50
Impact (J/cm2):≥78
Hardness :≤197HB
Heat treatment specification : 850 ℃ quenching ,oil cooling; 500 ℃ tempering,
water cooling, oil cooling.
Delivery condition : By heat treatment (normalizing, annealing and high
temperature tempering) or heat treatment state delivery, delivery status should
be indicated in the contract
SCM420 material under JIS G 4105 standard , this Japanese Industrial Standard
specifies chromium molybdenum steels , mainly for machine structural use
manufactured by hot forming such as hot rolling and forging ,ordinarily used
after further process of forging ,cutting and heat treatment .
BBN steel specialized in offering SCM420 structural steel pipe for many years
, if you have requirement about SCM420 material steel pipe , please contact with
us freely .
