KH12 cold work die steel is a high-carbon, high-chromium alloy tool steel, which is widely used in the manufacture of cold work molds that need to withstand high loads and high wear resistance. It has a carbon content of up to 12%, chromium content is also higher, reaching 117%。This special composition makes KH12 steel extremely hard and wear-resistant, able to withstand a wide range of complex working conditions.
The microstructure of KH12 steel is martensite and carbide, which gives it excellent strength and toughness after quenching and tempering. Its wear resistance is several times that of ordinary carbon steel, and it can maintain good working performance in various harsh environments such as high temperature, low temperature, and high load.
During the manufacturing process, KH12 steel undergoes a special heat treatment process, including quenching, tempering, and surface strengthening treatments. These processes ensure the hardness and wear resistance of KH12 steel, while also improving its corrosion resistance and durability.
Due to its excellent properties and wide range of applications, KH12 steel has become one of the preferred materials for making cold work molds. It can be used to manufacture cold stamping dies, cutting tools, measuring tools, etc. of various complex shapes, and is widely used in automotive, machinery, electronics, aerospace and other manufacturing fields.
In conclusion, KH12 cold work die steel is a tool steel with high hardness, high wear resistance, high strength and good durability. Its excellent performance and wide range of applications make it one of the important materials for the manufacture of cold work molds and other complex tools.
Grade: KH12 steel for cold work molds
Chinese ISC T21200
Other names: T21200
Corresponds to standard tool steel
tool and mould steels
Categorization of tool steels
Tags: Steel for cold work molds, Alloy steel
Description Features and Uses: Equivalent to D3 steel in ASTM A681 with good wear resistance. Widely used cold work die steel, with high strength, hardenability and wear resistance, quenching deformation is small; However, the impact toughness is poor, it is easy to be brittle, it is easy to form uneven eutectic carbides, and the thermal conductivity and high-temperature plasticity are also poor. It is suitable for the production of cold stamping dies and punches, cold shear knives, drill sleeves, wire drawing dies, etc., as well as gauges, templates, cam pins, eccentric wheels, etc., which require less impact load and higher wear-resistance.
This standard is applicable to hot rolled, forged, cold-drawn, silver bright bar steel and machined delivery steel of tool and die steel, and its chemical composition is also applicable to ingots, billets and their products
KH12 chemical element composition content (%)
Composition C Si Mn P s Cr
Minimum values 2 - 115
Maximum value 23 0.4 0.4 0.03 0.02 13
Smelting method: electric arc furnace + vacuum degassing.
KH12 mechanical properties
Condition: Heat treatment or state hardness
HBW Delivery Status: Annealed 217 269
Specimen quenched HRC
Specimen heat treatment system: quenching temperature 950 1000 °C, oil cooling
1 Approximate Comparison Table Alloy cold work tool steel
China, Japan, International Organization for Standardization, Germany, France, European Standard, Russia, United Kingdom
GB JIS ISO din en din nf en nf en numeric grade GOST BS en BS
cr12 skd1 x210cr12 x210cr12 z200c12 x210cr12 1.208 kh12 bd3
Hotspot Engine Program