What are the properties of 1.2379 tool steel

     The 1.2379 tool steel high carbon and high chromium cold work die steel, be widely used in the international. It is a kind of ledeburite steel, with high hardenability, hardening capacity and high wear resistance; oxidation resistance is good at high temperature, anti rust ability is good after quenching and polishing, the amount of deformation is small after heat treatment. High carbon, high chromium type ledeburite steel, if no special requirements, do not need to add cobalt. The content of molybdenum and vanadium are higher than the 1.2601 steel, so the steel microstructure and grain size of further refinement, increase the hardenability, the strength and toughness of steel, the better comprehensive properties of the steel.
     1.2379 steel used for the manufacturing requirements of high wear resistance of large die complicated cold, such as cold cutting, trimming die, drawing die, screw plate, thread rolling die, binding mode and requirement of high wear-resistant die and punch.

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What are the advantages of 1.2344 ESR steel

     1.2344 ESR steel is use of ESR to smelting, so it has a very high purity, macroscopic and microscopic uniformity is also high.
     When the sulfur content is lower than 0.005%, the transverse toughness becomes high.
     Special smelting method makes the alloy elements distribution is very uniform, can also form a uniform annealing microstructure with globular carbide.
     The maximum tempering hardness is 229HB.
     The 1.2344 steel need good thermally processed to obtain a uniform quenched and tempered tissue, so that the mechanical properties isotropic.
     The steel is made mould can resist the formation and propagation of cracks, especially produced thermal stress when temperature changes.

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About H13 hot work tool steel hardness

    Carbon content determines the hardness of quenched steel substrate of H13 hot work tool steel. According to the curve of relationship between carbon content and hardness of hardened steel in steel, we can know that the quenching hardness of H13 die steel at about 55HRC. For tool steel, a part of carbon into the steel matrix caused by solid solution strengthening the other part of the carbon and alloying element carbides combine to form alloy carbides. For H13 mould steel, this kind of alloy carbides in addition to a small amount of residual, and need it is precipitates in the quenched martensite matrix in the process of tempering, have twice of hardening. Thus the residual alloy carbon compounds and tempered martensite uniform distribution of tissues to determine the performance of hot work die steel.

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The corresponding grade of D2 cold work steel

The corresponding grade of D2 cold work steel:
China GB standard steel grade Cr12Mo1V1,
American ASTM/UNS standard steel grade D2/T30402,
International Organization for Standardization ISO standard steel grade 160CrMoV12,
French NF standard steel 160CrMoV12,
British BS standard steel grade BD2,
Japan JIS standard steel grade SKD11,
Japan HITACHI standard steel grade SLD,
Japan DAIDO standard steel grade DC11,
Japan NAXHI standard steel grade CDS11,
German DIN standard material number 1.2379 steel,
German DIN standard steel grade X155 CrMoV12-1,
Austria BOHLER standard steel grade K110,
Sweden ASSAB standard steel grade XW-41.

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The characteristics of high chromium steel 1.2080

    The high chromium steel 1.2080 is high carbon high chromium type ledeburite, carbon content up to 2%, so the impact toughness is poor, easy to rattle, and easy to form uneven eutectic carbides. There are a lot of elements Cr in 1.2080 steel, mainly formed 7C3 compounds (Cr·Fe), and carburizing type carbide are very few.
    A lot of carbonization logistics into austenite when quenching. After quenching martensite with high hardness. A large amount of dispersed carbides precipitation from martensite after tempering. Because of its hardness is very high, thus improves the wear resistance of steel, Cr and the isothermal transformation curve shifts to the right, thus increase the hardenability of steel. Martensitic transformation point is low, there is a lot of mold steel retained austenite after quenching, reduces the deformation of the mold quenching. High-carbon high chromium 1.2080 steel, with high hardenability, less deformation hardening, high hardness, good wear resistance.

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How to adjust the hardness of alloy steel aisi 4140 products

The alloy steel aisi 4140 products hardness adjustment methods are as follows:
Quenching + tempering: 840 ± 10 °C quenching in water or oil (depending on the complexity of the product shape), 680-700 °C tempering. HB <217.
Quenching + tempering: 840 ± 10 °C oil quenching, then 470 °C tempered. HRC41-45.
Quenching + tempering: 840 ± 10 °C oil quenching, then 480 °C tempered. HRC35-45.
Quenching + tempering: 850 °C oil quenching, then 510 °C tempering. HRC38-42.
Quenching + tempering: 850 °C oil quenching, then 500 °C tempering. HRC40-43.
Quenching + tempering: 850 °C oil quenching, then 510 °C tempered. HRC36-42.
Quenching + tempering: 850 °C oil quenching, then 560 °C tempered. HRC32-36.
Quenching + tempering: 860 °C oil quenching, then 390 °C tempering. HRC48-52.
Softening annealing specification:
Annealing temperature 680 ~ 700 °C, slow cooling in the furnace, the hardness ≤217HBW.
4140 steel quenching and tempering specification:
Quenching temperature 830 ~ 860 °C, oil-cooling or 180 ~ 220 °C salt bath cooling, hardness 52HRC, strength 1780MPa.
Tempering temperature: 100 °C / 200 °C / 300 °C / 400 °C / 500 °C / 600 °C, the hardness of 50HRC / 49HRC / 46HRC / 42HRC / 36HRC / 28HRC.

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What are the uses of DIN 1.2379 cold work steel

     DIN 1.2379 cold work steel is a high carbon high chromium alloy tool steel. After heat treatment has very high hardness and abrasion resistance, and the hardenability is strong, good size stability.
     Used for the production of a variety of silicon steel sheet of high speed blanking die.
     Used in precision stamping dies, cold extrusion die, drawing die, blanking die.
     Used for cutting sheet material efficient scissors, deep drawing die and tube drawing die.
     1.2379 steel is used for the complex and easy deformation mould. High wear resistance and long service life of cold punching mould.
     Used for the excellent wear resistance and good toughness cold working die, can be used for embossing dies, cold forging die.
     Used for heavy stamping die, cold shear blade, thread rolling die etc..
     DIN 1.2379 cold work steel is used for cold heading dies, pottery clay mold etc..
     Used for wear-resistant plastic mould.

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