Air-hardening A8 Mod Cold Work Tool Steel Plates Bars Sheet Forgings By Hubei Risunsteel Co., Ltd.,

Air-hardening A8 Mod Cold Work Tool Steel Plates Bars Sheet Forgings

Pays:

China

N Â° de modÃ¨le:

Prix FOB:

(Negotiable) Obtenir le dernier prix

LocalitÃ©:

China

Prix de commande minimale:

Commande minimale:

5 Ton

Packaging Detail:

in bundles or woodencases.

Heure de livraison:

45-90 days

Capacité de Fournir:

3000 Ton per Month

Payment Type:

T/T, L/C

Groupe de produits :

La description

Product Details
A8 is an air-hardening cold work tool steel. It exhibits good wearing qualities with excellent toughness characteristics. It is well suited for many metals working dies and punches, which operate in the hardness of Rockwell C ****0.
Applications:Punches, drift pins, pneumatic tools, chuck jaws, hammers, hot rolls, and hot and cold shear knives.
Quality Standard:ASTM A**1 *8 Standard Specification for Tool Steels Alloy.

Chemical Composition(%)

C	Si	Mn	P	S	Cr	Mo
0.**0.0	0.**0.0	1.**2.0	0.**0 max	0.**0 max	0.**1.0	0.**1.0

HEAT TREATMENT
Preheating: Heat at a rate not exceeding **0°F per hour to ********0°F and equalize.
Austenitizing: Heat slowly from the preheat. Furnace or Salt: ********0°F. Soak for *0 minutes for the first inch of thickness, plus *5 minutes for each additional inch.
Annealing: Annealing must be performed after hot working and before rehardening.
Heat at a rate not exceeding **0°F per hour to ***0°F, and hold at temperature for 1 hour per inch of maximum thickness; 2 hours minimum. Then cool slowly with the furnace at a rate not exceeding *0°F per hour to ***0°F. Continue cooling to ambient temperature in the furnace or in air. The resultant hardness should be a maximum of **1 HBW.
Hardening: Air, pressurized gas, or interrupted oil to ******5°F.

Note: Sizes over 5 inches in cross section may not achieve full hardness by cooling in still air. It is usually necessary to increase the quench cooling rate between ***0 to **0°F by using an air blast, pressurized gas, or an interrupted oil quench. For the oil quench, quench until black, about **0°F, then cool in still air to ******5°F.
Tempering: Temper immediately after quenching. Hold temperature for 1 hour per inch of thickness, 2 hours minimum, then air cool to ambient temperature. The typical tempering range is **0 to **0°F. Double tempering is recommended for tempering temperatures of **0°F and higher.
To minimize internal stresses in cross sections greater than 6 inches and to improve stability in tools that will be EDMd after heat treatment, a soaking time of 4 to 6 hours at the tempering temperature is strongly recommended.

Pays:	China
N Â° de modÃ¨le:	-
Prix FOB:	(Negotiable) Obtenir le dernier prix
LocalitÃ©:	China
Prix de commande minimale:	-
Commande minimale:	5 Ton
Packaging Detail:	in bundles or woodencases.
Heure de livraison:	45-90 days
Capacité de Fournir:	3000 Ton per Month
Payment Type:	T/T, L/C
Groupe de produits :	-