1.2379 round and flat bars

1.2379 is a tool steel with a carbon content of 1.5% and a chromium content of 11.5%. After heat treatment, the hardness can reach 60HRC. It is a kind of semi-stainless steel. D2 steel has good wear resistance and moderate toughness. The disadvantage is that the corrosion resistance is slightly insufficient. It is a more suitable steel for practical use. Bob Dozier loves to use the D-2. D2 steel is a high wear-resistant, micro-deformation cold-working die steel, and wind-hardened tool steel. D2 steel can be used to manufacture cold work die steel with large cross-section, complex shape, high impact resistance and high wear resistance, such as silicon steel sheet die, cold cutting scissors, trimming die, etc.

Basic Information
1.2379 The high carbon and high chromium cold work die steel widely used in the world is ledeburite steel with high
Hardenability, hardenability and high wear resistance; good high temperature oxidation resistance, rust prevention after quenching
Good polishing performance, small heat treatment deformation.

hardness
Annealing≤255HB, indentation diameter≥3.8mm;

Quenching≥59HRC

Heat Treatment Specifications
Quenching, preheating at 820±15°C, heating at 1000±6°C (salt bath) or 1010±6°C (furnace controlled atmosphere),

Keep warm for 10-20min, air-cool, and temper at 200±6°C.

Material properties
1.2379 steel is a kind of high wear-resistant micro-deformation cold work die steel, which belongs to wind hard tool steel. quality
The carbon content in the steel is as high as 1.5%, and the chromium mass fraction is as high as 11.5%. After heat treatment,
The hardness can reach 60HRC, but the plasticity, toughness and anti-rust ability are weak, and the steel surface
Difficult to mirror polish. With the development of cold stamping products in the direction of high precision, high efficiency and high precision
There are many varieties, and the mold steel is required to have good wear resistance and toughness. Compared with Cr12MoV steel,
The chemical composition of the steel increases Mo and V, changes the casting structure of the steel, and improves the
The shape of the cabochon. The strength, toughness and wear resistance are all better than Cr12MoV steel, which improves
Mold use. Life. Because the yield point and plastic deformation resistance of the steel are higher than that of Cr12MoV
The forging performance and thermoplastic formability of the steel are slightly worse than those of Cr12MoV steel.

reference level
China GB standard grade Cr12Mo1v1

American ASTM/UNS standard grade D2/T30402,

International Organization for Standardization (ISO) standard grade 160CrMoV12,

German DIN standard material number 1.2379,

German DIN standard brand X155CrMoV12-1,

French NF standard grade X160CrMoV12,

British BS standard grade BD2,

Japan JIS standard grade SKD11,

Hitachi (HITACHl) standard SLD,

DAIDO standard grade DC11,

Japan Fujitsu (NACHl) standard CDS11,

Austrian white deer (BOHLER) standard grade K110,

Swedish ASSAB standard grade XW41

scope of use
Various cold stamping dies suitable for complex and deformable tool steel, high wear resistance and long life
Life, cold shear blade, thread rolling plate; cold extrusion molding, drawing die, stainless steel sheet and high hardness
Material. mode etc.

typical application
1) It is used for the drawing die of the back cover of the refrigerator compressor, and the quenching hardness is 56~58HRC.

2) In order to improve the service life of D2 cold working die flat steel rolled products, the method of adding rare earth is
Using this technology, the wear resistance and impact toughness of steel are greatly improved, so as to achieve the purpose of improving steel.
Service life of round die flat steel rolled material.

3) Since the content of V and Mo in 1.2379 steel is higher than that of Cr12MoV steel, it has better comprehensive performance, and at the same time
The traditional Cr12MoV steel will be gradually replaced.

4) The cold punching die of the roller and the adjustment plate under the table is made of D2 steel, which can increase the service life by 5-6 years
Compared with Cr12MoV steel.