D2 tool steel (Cr12Mo1V1 1.2379)

D2 alloy tool steel     1.Cr12Mo1V1 (D2) steel is the wider usd international belong to high carbon and high chromium ledeburite cold work die steel 2.This steel has high hardenability, hardened, abrasion resistance, high temperature oxidation resistance 3.Quenching and polishing after has good anti-rust, heat deformation small, 4.should be the manufacturing requirements of high-precision, long-life cold work die, props and gauges. 5.Grade: D2,1.2379,X160CrMoV12,BD2,XW-42.   6.Chemical composition:

C	Si	Mn	Cr	Mo	V	P	S	Co
1.40-1.60	0.10-0.50	0.30-0.50	11.00-13.00	0.70-1.20	(0.80)	≤0.025	≤0.025	(0.60)

  7. Physical properties: Critical temperature

Critical point	Ac1	Acm	Arcm	Ar1	Ms
Temperature(Approximation)/°c	810	875	750	695	190

  8.Coefficient of expansion

Temperature/°c	20~100	20 ~200	20~300	20~400
Coefficient of expansion/°c-1	10.5*10-6	11.5*10-6	11.9*10-6	12.2*10-6

  9.Forging process

Item	Heating temperature/°C	start forging temperature/°C	final forging temperature/°C	cooling
Steel ingot	1120-1160	1050-1090	≥850	High-temperature annealing
Steel billet	1120-1140	1050-1070	≥      850	High-temperature annealing ,pit cold or Sand cold

          10. Quenching temperature and hardness, the amount of residual austenite

Quenching temperature/°c	900	950	980	1000	1030	1050	1080	1100	1130
Hardness HRC	52.5	57.5	60	63.5	64	63	62.5	62	60
residual austenite(%)	----	4	4	4.5	6	10	13	24	----

  11. Heat treatment specification and hardness

steel name	after annealed or cold drawn hardness≤HBW		Preheat temperature/°C	Quenching temperature /°C		thermal insulation /min	Cooling medium	Tempering temperature	after tempering hardness≥HBC
	annealed	cold drawn		Salt bath furnace	Controlled atmosphere furnace
D2 Cr12Mo1V1	255	269	816	996	1010	10-20	air cooling	204	59

12.Application: Suitable for impact and extrusion molds of high output,thread twisting molds,molds for ceramics, molds for electric circuit plates and plastic molds of high output. We are professional manufacture of tool steel. We can provide various kinds of tool steel and mould steel. If you have any question regarding our products ,please feel free to let us know. We assure you will receive our best attention to your enquiry.