Products
Chrome Molybdenum Alloy Steel
1.ＳＡＥ—American Society of Automotive Engineers:4115 4120 4135 4140
2.ＪＩＳ—Japanese Industrial Standard: SCM415 SCM420 SCM435 SCM440
product quality
Material Description

Cr, Mo alloying elements are used in high temperature and high pressure valves and pressure vessels to significantly increase the high temperature strength limit and only need to be quenched as well as to provide good resistance to hydrogen corrosion and high temperature. It is mainly used in bicycles, motorcycles, auto parts, screws, bolts, gears, shafts, and piston pins.

Main common materials：SCM415(SCM415H) Green Cross Steel , SCM420(SCM420H) Green Cross Steel , SCM435(4135) Red Cross Steel , SCM440 (4140) Red Cross Steel

Process introduction

If you have other requested specification, please contact with sales or highlight on the order.

Applications

Alloy Fasteners

Square Head Hollow Tube

Roller Chain

Special Forgings

 

Chemical Composition Table

SAE Chemical composition table

UNS SAE Chemical composition%
C Mn P S Si Ni Cr Mo Others
G13350 1335 0.33~0.38 1.60~1.90 0.030 or below 0.040 or below 0.15~0.35 - - - -
G13400 1340 0.38~0.43
G40230 4023 0.20~0.25 0.70~0.90 0.20~0.30
G40270 4027 0.25~0.30
G40370 4037 0.35~0.40
G40470 4047 0.45~0.50
G41180 4118 0.18~0.23 0.70~0.90 0.40~0.60 0.08~0.15
G41200 4120 0.90~1.20 0.13~0.20
G41300 4130 0.28~0.33 0.40~0.60 0.80~1.10 0.15~0.25
G41350 4135 0.33~0.38 0.70~0.90
G41370 4137 0.35~0.40 0.70~0.90
G41400 4140 0.38~0.43 0.75~1.00
G41420 4142 0.40~0.45

JIS G3509-1 Chemical composition table

  Chemical composition %
C Si (1) Mn P S Ni Cr Mo
SCM415RCH 0.13~0.18   0.60~0.90       0.90~1.20 0.15~0.25
SCM415HRCH 0.12~0.18 0.55~0.95 0.85~1.25 0.15~0.30
SCM418RCH 0.16~0.21 0.60~0.90 0.90~1.20 0.15~0.25
SCM418HRCH 0.15~0.21 0.55~0.95 0.85~1.25 0.15~0.30
SCM420RCH 0.18~0.23 0.60~0.90 0.90~1.20 0.15~0.25
SCM420HRCH 0.17~0.23 0.55~0.95 0.85~1.25 0.15~0.30
SCM425RCH 0.23~0.28 0.60~0.90 0.90~1.20
SCM425HRCH 0.55~0.95 0.85~1.25
SCM430RCH 0.28~0.33 0.60~0.90 0.90~1.20
SCM435RCH 0.33~0.38

JIS G4053 Chemical composition table

  Chemical composition %
C Si Mn P S Ni Cr Mo
SCM 415 0.13~0.18 0.15~0.35   0.030 or below 0.030 or below 0.25 or below   0.15~0.25
SCM 418 0.16~0.21
SCM 420 0.18~0.23
SCM 421 0.17~0.23 0.70~1.00
SCM 425 0.23~0.28 0.60~0.90 0.15~0.30
SCM 430 0.28~0.33
SCM 432 0.27~0.37 0.30~0.60 1.00~1.50
SCM 435 0.33~0.38 0.60~0.90 0.90~1.20
SCM 440 0.38~0.43
SCM 445 0.43~0.48
SCM 822 0.20~0.25 0.35~0.45

 

Package
Wire Wire Carrier Bar
Diameter 0.6MM~50MM Diameter 0.6MM~50MM Diameter 0.6MM~50MM
I.D. 200MM ~ 1000MM Wire Carrier Width 420MM~1000MM Non Chamfered L 2M~6M
O.D. 400MM ~ 1200MM Chassis W 1300MM~1600MM Chamfered L 2.5M~4M
Packahing Method PE IN＋PP OUT Wire Carrier Height 1000MM~1200MM Packing Method PE IN＋PP OUT
Weight 40KG~2250KG Packing Method 300kg~2250kg Weight 250KG~2250KG
Roll Direction Counter Clockwise or Clockwise Weight 300kg~2250kg    

 

 

Material Specification

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Mechanical Chart

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