ASTM A29/A29M 1340 steel

ASTM A29/A29M 1340 is mainly applied to various machine part,such as crank axle,axle,connecting rod,lever,nut,bolt,spring, and so on. When the finished parts diameter is smaller than 40 mm, its static strength and fatigue properties are similar to 5140, s

  • Features

ASTM A29/A29M 1340 steel is a medium carbon-manganese steel at quenching and high temperature tempering state.  Its strength, ductility and abrasion performance is better than 1040 steel. Besides, ASTM A29/A29M 1340 is also with good heat treatment performance and machinability.

But ASTM A29/A29M 1340 steel is in poor properties after welding. When the C element lowers to the minimum data in the standard requirements, it needs to preheating to 100-425 °C, then do the welding. It also has temper brittleness,overheating sensitivity and it is easy to crack in cold water. So it is usually used in quenching and high temperature tempering state.

ASTM A29/A29M 1340 is mainly applied to various machine part,such as crank axle,axle,connecting rod,lever,nut,bolt,spring, and so on. When the finished parts diameter is smaller than 40 mm, its static strength and fatigue properties are similar to 5140, so ASTM A29/A29M 1340 can used for small diameter parts to substitute for 5140 steel.

ASTM A29/A29M 1340 steel chemical composition :

Specification

Mn 

P ≤

S  ≤

Si

ASTM A29/A29M  1340

0.38-0.43

1.6-1.9

0.035

0.04

0.15-0.35

ASTM A29/A29M 1340 steel mechanical  properties:


Specification

YS
ReH,MPa, Min

TS
Rm,MPa

EL(%)
A,% ,min

Z,
% ,min

Hardness
HB,max

ASTM A29/A29M 1340

735

885

12

45

217

Request a quotation

Contact E-Mail: sales7@bebonchina.com