AISI 4140/ JIS SCM440/ DIN 42CrMo4 FORGED ALLOY STEEL BAR

aisi-4140-jis-scm440-din-42crmo4-forged-alloy-steel-bar

 AISI 4140/ JIS SCM440/ DIN 42CrMo4 FORGED ALLOY STEEL BAR

AISI 4140/ JIS SCM440/ DIN 42CrMo4 FORGED ALLOY STEEL BAR is a medium carbon, chromium-molybdenum, through-hardening alloy steel that has a good hardenability with high strength and toughness as well as good fatigue and impact resistance after heat treating.

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 AISI 4140/ JIS SCM440/ DIN 42CrMo4 FORGED ALLOY STEEL BAR is a medium carbon, chromium-molybdenum, through-hardening alloy steel that has a good hardenability with high strength and toughness as well as good fatigue and impact resistance after heat treating.

Similar Grades

Standard Grade Chemical composition (%)
C Si Mn Cr Mo P S

 

GB 42CrMo 0.38-0.45 0.17-0.37 0.50-0.80 0.90-1.20 0.15-0.25 ≤0.035 ≤0.035
AISI 4140 0.38-0.43 0.15-0.35 0.75-1.00 0.80-1.10 0.15-0.25 ≤0.035 ≤0.040
JIS SCM440 0.38-0.43 0.15-0.35 0.60-0.90 0.90-1.20 0.15-0.30 ≤0.030 ≤0.030
DIN 42CrMo4/ 1.7225 0.38-0.45 ≤0.40 0.60-0.90 0.90-1.20 0.15-0.30 ≤0.025 ≤0.035

 

Available Size

Forged steel round bar: dia100mm-dia1500mm

Forged flat bar: thickness20mm-400mm, width80mm-1000mm

Forged steel block: 100mm*100mm-1000mm*1000mm

 AISI 4140/ JIS SCM440/ DIN 42CrMo4 FORGED ALLOY STEEL BAR

Available Heat Treatment

Annealing/Normalizing/Hardening/Tempering/Quenching

Hot working temperature ℃: 1050-850

Annealing temperature ℃: 680-720

Normalizing temperature ℃: 840-880

Quenching temperature ℃: 820-850 water, 830-860 oil

Tempering temperature ℃: 540-680

 

Characteristics

Good overall combinations of strength, toughness, wear resistance and fatigue strength.

Application

Typical applications for 4140 HR bar are sprockets, bolts, chain pins, drill collars, universal joints, highly stressed parts or parts subject to severe wear.

 AISI 4140/ JIS SCM440/ DIN 42CrMo4 FORGED ALLOY STEEL BAR

Delivery Condition

Forged, black surface/ machined surface with customers’ required heat treatment

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