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Hot Rolled Alloy Steel Scm440 415 Round Bar Price
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Product: Views:275Hot Rolled Alloy Steel Scm440 415 Round Bar Price 
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Valid until: Long-term effective
Last updated: 2017-12-02 06:00
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Chemical Element for JIS SCM440 round alloy steel bar

Standard		 Grade Number
 
GB 42CrMo C Si Mn P S Cr Ni Mo Cu
ASTM 4140 0.36-0.44 0.10-0.40 0.65-1.10 ≤0.04 ≤0.04 0.75-1.20 - 0.15-0.35 ≤0.030
DIN 42CrMo4 1.7225 0.35-0.44 0.15-0.30 0.70-0.90 ≤0.035 ≤0.04 0.80-1.10 - 0.15-0.25 ≤0.025
JIS SCM440 0.38-0.42 0.15-0.35 0.60-0.85 ≤0.03 ≤0.03 0.9-1.20 ≤0.25 0.15-0.30 ≤0.30


Physical Properties for JIS SCM440 round alloy steel bar

Physical Properties
Tensile Strength (MPa) ≥1080(110)
Yield strength(MPa) ≥930(95)
Elongation(%) ≥12
Reduction of area(%) ≥45
Akv (J) ≥63
Impact roughness(J/cm2) ≥78(8)
Hardness ≤217HB
Specimen size 25mm


Surface Treatment: painting,plating,polishing,black oxide,transparent anti-rust oil

Heat treatment: Normalized / Annealed / Quenched / tempered


Processing
 
Electric arc furnace melting→refining furnace→vacuum treatment furnace→
→cast ingot→steel ingot anneal→ heating → high-speed forging, refining
forging→annel,retarded cooling,air cooling→quenching and tempering
treatment→finishing operation→test→finished products
 
Application:
Foodstuff, gas, metallurgy, biology, electron, chemical, petroleum, boilers, nuclear, energy, construction field, ships building industry, war and electricity industry, boiler heat exchanger, machiner and hardware fields and medical equipment, fertilizer, etc.
 
Symbol
of Class		 Chemical Composition %
C Si Mn P Max. S Max. Cr Mo
SCM 415 0.130.18 0.150.35 0.600.85 0.030 0.030 0.901.20 0.150.30
SCM 418 0.160.21 0.150.35 0.600.85 0.030 0.030 0.901.20 0.150.30
SCM 420 0.180.23 0.150.35 0.600.85 0.030 0.030 0.901.20 0.150.30
SCM 421 0.170.23 0.150.35 0.701.00 0.030 0.030 0.901.20 0.150.30
SCM 430 0.280.33 0.150.35 0.600.85 0.030 0.030 1.001.50 0.150.30
SCM 432 0.270.37 0.150.35 0.300.60 0.030 0.030 0.901.20 0.150.30
SCM 435 0.330.38 0.150.35 0.600.85 0.030 0.030 0.901.20 0.150.30
SCM 440 0.380.43 0.150.35 0.600.85 0.030 0.030 0.901.20 0.150.30
SCM 445 0.430.48 0.150.35 0.600.85 0.030 0.030 0.901.20 0.150.30
SCM 822 0.200.25 0.150.35 0.600.85 0.030 0.030 0.901.20 0.150.30
Note : As impurities, Ni and Cu shall not exceed 0.25% and 0.30% respectively for all grades.





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