• High Peak Steels Ltd, Brookfield Ind Est, Peakdale Road, Glossop, Derbyshire, SK13 6LQ

BRIGHT 709M40T

Description

This is a similar grade to 708M40 but with a variation in the molybdenum content and is usually supplied heat treated to ‘T’ condition. This grade offers good ductility and shock resisting properties combined with resistance to wear. At low temperatures it has reasonably good impact properties. 709M40T is a popular high tensile engineering steel with a tensile of 850-1000N/mm². This grade can be nitrided and flame or induction hardened which will give the steel maximum wear and abrasion resistance characteristics. It is stocked in Bright & Black condition in the heat treated state, it is readily machinable and components can be put in service without further heat treatment.

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Products & Sizes

ProductMetric sizes
Min

Max
Imperial sizes
Min

Max
codes-round210mm dia75mm dia1/2" dia3" dia
codes-flat2
codes-square2
codes-hex2

Associated Standards

StandardCode
UK StandardEN19
European Grades42CrMo4
Werkstoff
1.7225
SAE/AISI4140

Chemical Composition

 CSiMnSPCrNiMo
Min0.360.10.70.90.25
Max0.440.3510.040.0351.20.40.35

 

Mechanicals

 Yield
N/mm2
0.2% proof
N/mm2
UTS (Rm)
N/mm2
Elong (A)
%
Red of Area (Z)
%
Hardness
HB
Impact Test (KV)
J
Quenched & Tempered to condition R (min)
4957001520128
Quenched & Tempered to condition R (max)
850255
Quenched & Tempered to condition S (min)
5857751522350
Quenched & Tempered to condition S (max)
925277
Quenched & Tempered to condition T (min)6808501324850
Quenched & Tempered to condition T (max)1000302
Quenched & Tempered to condition U (min)7559251226942
Quenched & Tempered to condition U (max)1075331
Drawn Quenched & Tempered to condition T
(min)
700850924850
Drawn Quenched & Tempered to condition T
(max)
1000302

Typical Applications

  • Automotive parts
  • Gears
  • Induction hardened pins
  • Axle shafts
  • Oil & Gas parts
UA-23101739-40