Specifications

forged alloy steel round bar cr8:
Size: diameter:10-350mm, length 2000-4000mm.
annealing to HB<210

forged alloy steel round bar cr8 product description:

 

Grade:Mould steel D3/DIN 1.2080/JIS SKD1/GB Cr12

 

General Information:

Steel with wear resistance and fairly good dimensional stability during heat treatment. Rolls for cold strip mills and wire squeezer mills, circular knives and shear blades, dies for small metal parts, punches and drawing dies, dies for sintering, forming tool rollers, shear blades, molds for plastic materials.

forged alloy steel round bar cr8

 

 

Comparable Standards:                                                                                                       

AISI/SAE	DIN	W.Nr.	AFNOR	JIS	BS	SIAU	GB,YB
D3	X210Cr12	1.2080	Z200C12	SKD1	D3	K12	-

 

 Chemical Analysis (%):                                                                                                         

C	Mn	Si	Cr	V	Mo	P	S
1.90-2.20	0.15-0.45	0.10-0.40	11.0-12.0	-	-	≤0.03	≤0.03

   

Heat treatment                                                                                                       

Isothermal annealing:

-   Heat to 850°Chold for 1/2 hour to 1 hour;

-          Furnace cooling to 770°C and hold at temperature for at least 10 hours;

-          Cool by 10°C /h to 720°C;

-          Cooling in air.

Stress relieving:

   To be carried out after machining and before the final heat treatment.

-          Heat to 650-700°C, hold for 4/6 hours:

-          Furnace cooling to 330-350°C;

-          Cooling in air.

Hardening:

-          Initial preheating to 350-450°C;

-          Second preheating to 750-850°Cin salt bath at 850°C;

-          Austenitizing at 960-100°C;

-          Cooling in fluid oil.

Quenched hardness: 64-65 HRC

 

Payment terms: T/T,L/C.

 

UT test up to standard SEP 1921-84 Class C/c.

 

Characteristic application:

All kinds of stainless steel, silicon steel and aluminum sheets stamping mould