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ASTM A29/A29M 4140 steel

Thickness: 3.0mm to 14.0mm
Width: 20mm to 300mm
Finish: No.1, Bright, Black
Payment terms: L/C, T/T
Packaging: Wooden pallets,water proof paper

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Product introduction

ASTM A29/A29M 4140 steel contains high C and Cr elements,so its strength and hardenability are very good. After quenching and high temperature tempering, ASTM A29/A29M 4140 owns high fatigue resistance and impact-with standing, good tenacity at low impact, and without tempering fragility. So ASTM A29/A29M 4140 is usually used at quenching and high temperature tempering delivery state.

ASTM A29/A29M 4140 can applied to manufacture shaft,gear,connecting rod,gear-box partes,and so on.  BBN Industry can offer 4140 at ASTM A29/A29M standard.

ASTM A29/A29M 4140 steel chemical composition :

Grade

Si 

Mn 

P ≤

S  ≤

N

Cr

Mo

ASTM A29/A29M 
4140

0.38-0.43

0.15-0.35

0.75-1.0

0.035

0.04

-

0.8-1.1

0.15-0.25

ASTM A29/A29M 4140 steel mechanical  properties:


Grade

YS
ReH,MPa, Min

TS
Rm,MPa

EL(%)
A,% ,min

Z,
% ,min

Hardness
HB,max

ASTM A29/A29M
4140

930

1080

12

45

217

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