A2 air-cooled tool steel

grade of steel	C	Si	Mn	P	S	Cr	Mo	V
A2	0.95-1.05	0.20-0.40	0.45-0.75	Max.-0.030	Max.-0.030	4.75-5.15	0.90-1.40	0.20-0.40

Remark：Cu + Ni：0.75%

Practical use

Precision stamping die.

Precision punching die and stamping die for various purposes.

Tools for plastic deformation of difficult materials.

Die for cold forging, deep drawing and thread rolling.

Other uses

High speed punching punch, stainless steel plate punch.

Drawing die, crimping die, embossing die, wear plastic forming die.

Factory status :HB230-250

Heat treatment specification

Annealing:

The temperature is 845~870℃, and the furnace is cooled to about 540℃ at 8~15℃/h.

Stress relief:

The temperature is about 650~675℃, cooling in the furnace

Quenching:

Preheat -- temperature 790℃, every 25mm for about 20 minutes;

Wastian iron - temperature 925~980℃, every 25mm for about 20 minutes.

Quenching medium: air.

Tempering:

Low temperature tempering -- temperature 175~540℃, every 25mm for about 30 minutes, air cooling, hardness HRC 61~64.