4140

  • 1.7225, G41400, SCM440

SpecificationASTM A322, ASTM A29

The premium low alloy steel produced by GMTC has higher strength than 4130 because of its higher carbon content, and has better properties after being heat treated. It also exhibits good resistance to atmospheric corrosion and reasonable strength, but has lower weldability.

Quick Navigation

Inquiry

Introduction

Product properties

˙High strength

˙High toughness

˙High wear resistance

˙Good fatigue resistance

Industrial Applications

˙Machine industry

˙Automobile

˙Aerospace

˙Oil, gas, and water


Specifications

Chemical composition (wt. %)

Element
C
Si
Mn
P
S
Ni
Cr
Mo
Cu
Min.
0.38
0.15
0.75
-
-
-
0.80
0.15
-
Max.
0.43
0.35
1.00
0.025
0.025
0.25
1.10
0.25
0.35

Physical Property

Density (g/cm^3)
7.87

Thermal Expansion Coefficient

Temperature (℃)
10^-6/℃
20
12.5

Thermal Conductivity

Temperature (℃)
W/m·K
20
40

Mechanical Property

Items
Annealed
Hardness (HBW)
229 max.

Size Ranges

Products
Diameter (mm)
Length (mm)
Rolled bar
10~95
3,000~5,700
Forged bar
95.2~600
3,000~5,700
Billet
130x130, 140x140, 150x150, 160x160
7,000 max
Flat bar
80x80 (min.)
Based on the customer needs

The product has been added to the inquiry form!

COOKIES

The website uses the browser’s cookies to give you the best user experience. The Cookies we used include the third party cookies. For more information, see our Privacyand Cookies Policies. By continuing to browse our website or closing this prompt, you agree to accept our Terms of Use of our website.

I agree

前往舊版網站
獲得完整瀏覽體驗

您所使用的裝置版本不支援新版網站的部分功能,請移轉至舊版網站獲得完整瀏覽體驗

立即前往