1.2378 X220CrVMo12-2 Cold Work Tool Steel

Detail Information

1.2378 is Cold working steel. Ledeburitic chromium steel with high durability and cutting performance.

Applications

Tools for cutting of dynamo and transformer sheet, measuring instruments, tools for processing

of plastics.

Mat.No.: 1.2378

DIN: X220CrVMo12-2

C(％)	Si(％)	Mn(％)	P(％)	S(％)	Cr(％)	Mo(％)	V(%)
2.15-2.30	0.15-0.30	0.25-0.40	Max 0.035	Max 0.035	12.0-13.0	0.80-1.00	2.00-2.30

Proof strength Rp0.2 (MPa)	Tensile strength Rm (MPa)	Impact energy KV (J)	Elongation at fracture A (%)	Reduction in cross section on fracture Z (%)	As-Heat-Treated Condition	Brinell hardness (HBW)
933 (≥)	238 (≥)	12	43	33	Solution and Aging, Annealing, Ausaging, Q+T,etc	122

Modulus of elasticity [103 x N/mm2]:210

Density [g/cm3]:7.63

Thermal conductivity [W/m.K]:20.0

Electric resistivity[Ohmmm2/m]:0.65

Specific heat capacity[J/g.K]:0.46

Heat to 820-850 C , cool slowly in furnace . This will produce a maximum Brinell hardness of 260 .

Stress relieving to remove machining stresses should be carried out by heating to 650 C, holding

for one hour at heat, followed by air cooling. This operation is performed to reduce distortion

during heat treatment .

Harden from a temperature of 1070-1100 C followed by air quenching or warm bath quenching

350-450C. Hardness after quenching is 63-64 HRC.

Hot forming temperature: 1050-900°C.

The machinability rating of 1.2378 is roughly 25 % that of free machining carbon steel 1018.

Due to its abrasion resistant nature, machining in the hardened condition should be limited to

finish grinding.