High Quality DIN 1.2379 Cold Work Tool Steel
We supply high quality cold work tool steel DIN 1.2379 from
dia.1.5mm min. to 650mm.
Such big size range could meet your demands very well.
DIN 1.2379 is equial to AISI D2, JIS SKD11, GB Cr12Mo1V1, with
higher content of V and Mo.
It is widely used in making various kinds of cold work molds.
AISI / SAE
DIN / W.Nr
◆ Chemical Composition (%)
|Cold Drawn||Hot Rolled||Forged|
|** We Recommend ESR from dia.400mm|
◆ Delivery Condition
Smelting method: EAF+(ESR) or EAF+LF+VD+(ESR)
Prodution method: Hot rolled or Cold Drawn or Forged
Heat treatment: Annealed
Hardness: 255HB max.
Surface: Untreated or Treated as Peeling, Turning, Grinding
UT: 100% Passed
1. With good hardenability and wear resistance.
2. With high oxidation resistance, good corrosion resistance after
quenching and polishing, small deformation after heat treatment.
For making different kinds of cold work molds with high accuracy
and long service life,
cutting tools and measuring instruments, such as complex-shaped
threading screw plates, cold extrusion dies, cold cutting scissors,
◆ Forging Technique
◆ Heat Treatment
800 to 850°C
Slow controlled cooling in furnace at a rate of 10 to 20°C/hr down
to approx. 600°C,
further cooling in air.
Hardness after annealing: max. 255 HB.
650 to 700°C
Slow cooling in furnace; intended to relieve stresses set up by
or incomplex shapes.
After through heating, hold in neutral atmosphere for 1 to 2 hours.
1020 to 1040°C
Complex shapes/air, simple shapes/air blast, oil, salt bath from
(220 to 250°C or
500 to 550°C).
Holding time after temperature equalization: 15 to 30 minutes.
Obtainable hardness: 63 - 65 HRC.
Slow heating to tempering temperature immediately after
hardening/time in furnace
1hour for each 20 mm of work piece thickness, but at least 2
hours/cooling in air.
For average hardness figures to be obtained, please refer to the
For certain cases we recommend to reduce tempering temperature and
For certain applications requiring improved retention of hardness,
a nitriding treatment