JIS SCM420/ASTM 4118/20CrMo steel gear

JIS SCM420/ASTM 4118/20CrMo steel gear has the high hardenability, no temper brittleness, weldability

is quite good, form the cold cracking tendency is very small, good machinability and cold strain and

plastic. Generally in the quenched and tempered or carburizing and quenching condition, used in the

manufacture of the corrosive medium and working temperature below 250 ℃, containing hydrogen

nitrogen mixture medium working in high pressure pipe and all kinds of fasteners, more senior carburized

parts, such as gear, shaft, etc. Carbon low chemical composition: C: 0.17 ~ 0.24 Si Si: 0.17 ~ 0.37 Mn

Mn: 0.40 ~ 0.70 S S: allows the residual content of 0.035 or less phosphorus P: allow the residual

content of 0.035 or less chromium Cr: 0.80 ~ 1.10 Ni Ni: allows the residual content of 0.030 or less

copper Cu: allows the residual content of 0.030 or less Mo Mo: 0.15 ~ 0.25 low mechanical properties,

tensile strength of sigma b (MPa) : 885 (90), yield strength or higher sigma S (MPa) : 685 (70) or higher

elongation delta (%) : 5 or greater reduction of area of 12 bits (%) : 50 or higher impact energy Akv (J) :

or greater impact toughness value of alpha 78 kv (J/cm2) : 98 (10) or higher hardness: 197 hb or less

sample size: blank sample size is 15 mm low heat treatment specification and metallographic

organization: heat treatment specification: 880 ℃ quenching, water cooling, oil cooling; 500 ℃

tempering, cooling, oil cooling.

JIS SCM420/ASTM 4118/20CrMo Features:
With higher hardenability, non-temper brittleness, very good weldability, forming a small tendency to cold

cracking;a good cutting performance and cold response plasticity.

JIS SCM420/ASTM 4118/20CrMo Applications:
Usually being used at the quenched and tempered or case hardening state,for the manufacture of non-

corrosive media and working temperature below 250 , the medium containing a mixture of nitrogen and

hydrogen in the work of a variety of high-pressure pipes and fasteners, the higher the infiltration carbon

components, such as gears, shafts and so on.

Bebon International is a professional JIS SCM420/ASTM 4118/20CrMo exporter and a steel gear Stockist

in China. We keep more than 1000 tons JIS SCM420/ASTM 4118/20CrMo in stock every month. If you

want to get the JIS SCM420/ASTM 4118/20CrMo price, please do not hesitate to contact us. Any need in

JIS SCM420/ASTM 4118/20CrMo Chemical Composition and Mechanical Properties, please feel free to

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