1.2379 / X153CrMoV12 Tool Steel

1.2379 / X153CrMoV12 Tool Steel Manufacturer and Exporter,supplied with round,square,and flat.1.2379 / X153CrMoV12 Tool Steel is a high-carbon, high-chromium tool steel alloyed with molybdenum and vanadium as per ASTM A 681 standard.It is the most commonly used steel among the group D steels.It has high abrasive wear resistance,high compressive strength ,good through-hardening properties,high stability in hardening and good resistance to tempering-back. 1.2379 / X153CrMoV12 Tool Steel is often supplied in annealed condition.

1.2379 / X153CrMoV12 Tool Steel Supply Form & Size & Tolerance

Supply Form	Size(mm)	Process	Tolerance
Round	Φ6-Φ100	Cold Drawn	Bright/Black	Best H11
	Φ16-Φ350	Hot Rolled	Black	-0/+1mm
			Peeled/ground	Best H11
	Φ90-Φ1000	Hot Forged	Black	-0/+5mm
			Rough Turned	-0/+3mm
Flat/Square/Block	Thickness :120-800	Hot Forged	Black	-0/+8mm
	Width:120-1500		Rough Machined	-0/+3mm

Remark:Tolerance can be customized as per requests

1.2379 / X153CrMoV12 Tool Steel Chemical Composition per ASTM A681 (Cold Work Tool Steel)

GRADE	C	Si	Mn	P	S	Cr	Mo	V
D2	1.40-1.60	0.10-0.60	0.10-0.60	≤ 0.030	≤ 0.030	11.00-13.00	0.70-1.20	0.50-1.10

 

1.2379 / X153CrMoV12 Tool Steel Physical Property

Temperature		20°C	200°C	400°C
Melting point		1421°C
Density ,kg/m3		7700	7650	7600
Modulus of elasticity,Mpa		210000	200000	180000
Coefficient of thermal expansion	low temperature tempering per °C from 20°C	–	12.3 x 10^–6	–
	high temperature tempering per °C from 20°C	–	11.2 x 10^–6	12 x 10^–6
Thermal conductivity,W/m °C		20	21	23
Specific heat,J/kg °C		460	–	–

1.2379 / X153CrMoV12 Tool Steel Mechanical Property

	Metric	Imperial
Hardness, Knoop (converted from Rockwell C hardness)	769	769
Hardness, Rockwell C	62	62
Hardness, Vickers	748	748
Izod impact unnotched	77.0 J	56.8 ft-lb
Poisson’s ratio	0.27-0.30	0.27-0.30
Elastic modulus	190-210 GPa	27557-30457 ksi

1.2379 / X153CrMoV12 Tool Steel Copressive Strength

Hardness	Compressive yield strength, Rc 0.2
HRC	Mpa	ksi
62	2200	319
60	2150	312
55	1900	276
50	1650	239

1.2379 / X153CrMoV12 Tool Steel Forging

Heat the 1.2379 / X153CrMoV12 Tool Steel slowly and uniformly to 700°C then more rapidly to 900-1040°C. Reheat is necessary when temperature is below 900°C.AISI D2 steel  should be cooled as slowly as possible in furnace,and annealing is strongly recommended after forged.

1.2379 / X153CrMoV12 Tool Steel Annealing

Annealing must be performed after hot working and before re-hardening. Heat at a rate not exceeding 220°C per hour to 870-900°C, and hold at temperature for 1 hour per inch (25.4mm) of maximum thickness; 2 hours minimum. Then cool slowly with the furnace at a rate not exceeding 20°C per hour to 530°C. Continue cooling to room temperature in the furnace or in air. The resultant hardness should be a maximum of 255 HBW.

1.2379 / X153CrMoV12 Tool Steel Sress Relieving 
After rough machining,1.2379 / X153CrMoV12 Tool Steel should be heated throughly to 600-650°C, holding time 2 hours. Cool slowly to 500°C, then freely in air.

1.2379 / X153CrMoV12 Tool Steel Hardening

Preheating temperature: 650–750°C.
Austenitizing temperature: 990– 1050°C, but usually 1000–1040°C.

Temperature , °C	Soaking time Min.	Hardness before tempering
990	60	approx. 63 HRC
1010	45	approx. 63 HRC
1030	30	approx. 63 HRC

Quenching Media
• Oil (Only very simple geometries)
• Vacuum (high speed gas)
• Forced air/gas
• Martempering bath or fluidized bed at 180–500°C, then cooling in air.

1.2379 / X153CrMoV12 Tool Steel Tempering

Temper immediately after quenching. Hold at temperature for 1 hour per inch (25.4 mm) of thickness, 2 hours minimum, then air cool to ambient temperature. The typical tempering range is 180 to 210ºC.Double tempering is recommended.

Temperature ,°C	150	200	250	300	350	400
Hardness,HRC	62-61	61-60	60-59	57-56	56-55	56-55

1.2379 / X153CrMoV12 Tool Steel Application

1.2379 / X153CrMoV12 Tool Steel is used in a wide variety of tool making applications.Use 1.2379 / X153CrMoV12 Tool Steel for applications requiring long runs and close tolerances. Use it for tools and dies for blanking, punching, forming, cold-extruding, and other operations requiring high compressive strength and excellent wear resistance.

Typical applications includes :Cutting, punching, stamping tools, shear blades, thread rolling dies, cold extrusion dies, drawing and bending tools, flanging and straightening rolls, fine cutting tools, deep drawing tools, plastic moulds for abrasive polymers