Equivalent grades

GB 

DIN 

AISI 

JIS 

-

3Cr2Mo

1.2311

P20

-

-

Chemical 
Composition

C

Si

Mn

Cr

P

S

Mo

Ni

-

0.35-0.45

0.20-0.40

1.30-1.60

1.80-2.10

≤0.030

≤0.035

0.15-0.25

-

-

Available size

Round Bar

Diameter

Length

60-800mm

2000-6000mm

Flat Bar

Thickness

Width

Length

25-400mm

200-800mm

2000-6000mm

Smelting&shaping

EF/ ESR+ hot forged/ hot rolled

Surface condition

Black surface/ Grinded/ Machined

Annealed hardness

50-54 HRC   

Characteristics

good toughness properties, easy to machine, better polishability than 1.2312, 
dimensional stability flame hardenable, good photoengraving properties

Applications

Plastic moulds,frames for plastic pressure dies,hydroforming tools

Heat Treatment

Annealing

Heat to 720÷750°Cfor 2÷4 h furnace co

Tempering

To be carried out after hardening in the range 580÷650°C for 25mm of thickness minimum 2h