British BS 970 1955

British BS 970

1991

Carbon

Content (%)

Description

En3B

070M20

0.15 / 0.25

General purpose grade, suitable for use in many engineering applications, case hardening and welding.

En32

080A15

0.13 / 0.18

General purpose engineering, suitable for case hardening and welding.

En1A

220M07 / 230M07

0.15 Max.

A low carbon, free cutting steel that is highly machinable with consistent properties giving a good surface finish.

En1A Leaded

220M07 PB 230M07 PB

0.15 Max.

A low carbon, free cutting mild steel with added lead that improves machining with very little effect on mechanical properties. Unsuitable for welding.

En8

080A40 / 080M40

0.40 / 0.45

Medium tensile strength.  Small sizes suitable for induction hardening.

En8DM

212A42

0.40 / 0.45

A free cutting version of 080M40 medium carbon steel, offering improved machinability.

British BS 970:1955

British BS    970:1991

Alloy Element  (%)

Description

En16T

605M36T

Mn 1.3/1.7
Moly 0.22/0.30

A manganese molybdenum steel with good ductile and mechanical strength and the ability to withstand shock loading.

En16MT

606M36T

Mn 1.3/1.7
Moly 0.22/0.30                                

As En16 but more suitable for repetition machining. Welding not recommended.

En19T

708M40T / 709M40T

Chr 0.9/1.2
Moly 0.25/0.35

A 1% typical chromium molybdenum steel with good ductile and mechanical strength. Suitable for higher strength applications where resistance to shock is required.

En24T

817M40T

Nick 1.3/1.7
Chr 1/1.4
Moly 0.2/0.35

A nickel chrome molybdenum steel with high strength and toughness. Good ductile and tensile strength with good shock and wear resistance properties.

En36

655M13

A nickel chrome case hardening steel. Can be hardened to provide a very hard surface with a strong, tough core.

SAE8620

A low alloy case hardening steel which is supplied to American standards.