What is SKH4C and what is SK4?

Grade: Japan SKH4C stainless edge steel.

SKH4C characteristics: SKH4C (non-rusting edge steel - hardened HRC60° 2°) ultra-high hardness super mirror stainless edge steel, with excellent rust resistance, corrosion resistance, wear resistance (high hardness) performance and ideal impact resistance, a wide range of applications. Compared with the general stainless die steel, which has a service life of 3 6 times, the corresponding AISI440C and SUS440C have better cutting sharpness and wear resistance.

In the salt water, the rust resistance can be increased to more than 10 15 times, the quality is quite excellent and stable, and it can produce extremely complex and precise shank shapes.

SKH4C :( a type of high-speed steel that is completely rust-free. (Hardening: HRC60° 2°).

This is super high hardness super mirror stainless steel high speed steel. It has excellent rust resistance, corrosion resistance, wear resistance (high hardness) and ideal impact resistance. It has a wide range of applications.

Its service life is 3-6 times that of ordinary stainless steel products. In addition, AIS1440C and SUS440C have better permeability and better wear resistance. In a saltwater environment, its rust resistance can be increased by more than 10-20 times.

Its quality is very good and stable.

Carbon tool steel.

The strength and wear resistance of SK4 steel are higher than those of T8 and T9, but the hot hardness is low, the hardenability is not high, and the quenching deformation is large. SK4 is suitable for manufacturing with poor cutting conditions and high wear resistance requirements.

1. Supply hardness: soft, semi-hard, hard (heat-treated hard material).

2. Surface color: white, blue, golden, heat-treated primary color.

3. Delivery condition: The steel is delivered in annealed condition. By agreement between the two parties, it can also be delivered without annealing.

<>SK3 is a kind of carbon Huiyun silver tool steel, and it is also a kind of high-carbon steel, this material has good wear resistance and machinability. However, due to the relatively small content of alloying elements in SK3 steel, its hard and quiet deficiency layer is relatively shallow, and the tempering resistance is low, and the deformation is relatively large after quenching. SK3 is the number of Japan, the carbon content of this steel is above, it is also relatively easy, the machinability is relatively good, and it is a tool steel used to make a low hardenability cold work mold.

It is often used to make some dies, fixtures or parts with high hardness and wear resistance for some sliding parts.

SK4 is a carbon tool rigid.

Composition Carbon C : Silicon Si: Manganese Mn:

Sulfur s : phosphorus p : chromium cr:

Allowable Residual Content When manufacturing lead bath quenched steel wire) Nickel Ni: Permissible residual content When manufacturing lead bath quenched steel wire) Copper Cu: Permissible residual content When manufacturing lead bath quenched steel wire) Note:

Allowable residual content cr+Ni+cu when manufacturing lead bath quenched steel wire) Hardness: annealed, 197HB, indentation diameter; Quenching, 62HRC Heat Treatment Specification and Metallographic Structure: Heat Treatment Specification:

Specimen quenching 760 780, water cooled.

This raw material is often used in the production of tools. It is generally delivered in an annealed condition.

When choosing a cutting knife, you need to choose a very strong knife, which hurts the knife.

The product I've seen from which it is used as a raw material is a razor.

Other estimates are what sabers and the like.

SK4 is a carbon tool steel, and the strength and wear resistance of SK4 steel are higher than those of T8 and T9, but the hot hardness is low, the hardenability is not high, and the quenching deformation is large. SK4 is suitable for manufacturing various tools with poor cutting conditions, high wear resistance requirements, and is not subject to sudden and violent vibration, and requires a certain toughness and sharp knife edge, such as turning tools, planer knives, drills, paper cutters, and low-precision and simple shape measuring tools (such as pallets, etc.), which can be used as wear-resistant parts that are not subject to large impact.

Carbon C:

Silicon SI:

Manganese mn:

Sulfur s:

Phosphorus p:

Chromium Cr: Permissible Residual Content When Fabricating Lead Bath Quenched Steel Wire) Nickel Ni: Permissible Residual Content When Fabricating Lead Bath Quenched Steel Wire) Copper Cu:

Allowable residual content When manufacturing lead bath quenched steel wire) Note: Allowable residual content Cr+Ni+Cu When manufacturing lead bath quenched steel wire) Hardness: annealing, 197HB, indentation diameter; Quenched, 62hrc

Carbon C:

Silicon SI:

Manganese mn:

Sulfur s:

Phosphorus p:

Chromium Cr: Permissible Residual Content When Fabricating Lead Bath Quenched Steel Wire) Nickel Ni: Permissible Residual Content When Fabricating Lead Bath Quenched Steel Wire) Copper Cu:

Allowable residual content When manufacturing lead bath quenched steel wire) Note: Allowable residual content Cr+Ni+Cu When manufacturing lead bath quenched steel wire) Hardness: annealing, 197HB, indentation diameter; Quenched, 62hrc

SKT4 belongs to the Japanese standard hot work die steel, the executive standard: JIS G4404-2006 SKT4 steel has good toughness, strength and high wear resistance, is a hot work die steel. Its mechanical properties are almost the same at room temperature and 500 600.

When heated to 500, it can still maintain the hardness of about HB300. Due to the presence of molybdenum in steel, it is not sensitive to tempering brittleness. After the 600 cooled down slowly, the impact toughness decreased only slightly.

It is suitable for manufacturing all kinds of large and medium-sized hammer forging dies and trimming dies with complex shapes, large impact loads, low working temperatures, and side lengths of 400mm. It is used for manufacturing, simple shape, general manufacturing process, smelting, vacuum refining process is used to ensure the purity of steel; Large-scale professional heat treatment is used to achieve the best pre-hardening effect of the steel, and the hardness is evenly distributed.

The chemical composition of SKT4 is shown in the figure below

SK Group is the third largest multinational company in South Korea, with two of its subsidiaries in the Fortune Global 500, with two of its subsidiaries in the ranks of the world's top 500 companies. Currently, SK and its affiliates have more than 30,000 employees and 124 offices and subsidiaries worldwide. The world's top 500 companies ranked 57th, with an annual sales revenue of 80.8 billion US dollars.

LOL is a project it sponsors, called skt1 is not skt is skt1kt1s

SKH9 Japan Hitachi YSS Anjie Steel.

It belongs to cold die tool steel.

Also known as yxm1

The tungsten content is above that.

Japan Hitachi SKH9 special high-quality high-speed die steel.

Comparison criteria and characteristics: m2 chemical composition analysis results (%)Carbon:

Silica Cavity God: Following.

Chromium: Manganese: Below.

Molybdenum: vanadium: tungsten: phosphorus:

Sulfur: Steel Properties: High Speed Steel.

General use of steel: suitable for manufacturing strong cutting and wear-resistant, high-grade molds, screw molds, round molds that require toughness and complex tools, milling cutters, drills, etc.

Factory condition and hardness (surface): HB900-1100 HRC63