SKH20

Other

SKH20

Tungsten-type high-speed steel. (JIS G4404; equiv ASTM A600 / DIN 1.3355 / JIS SKH2 / GB W18Cr4V). Nominal values—confirm mill certificate.

Chemical Composition (%)

C0.65
W17
CR3.75
V0.9

Mechanical Properties

Hardness:≥63 HRC

Chinese Standard

JIS G4404 SKH20

Equivalent Standards

ASTM A600

Applications

钨系高速钢。,Bar

Available Forms

Tool and die steel for cutting, forming, punching and molding tools. Tungsten/molybdenum (≈17.75%/0%) give hot hardness and red-hardness for high-speed and hot-work tools. High chromium (≈4.125%) provides wear resistance and secondary hardening. Applied to blanks, punches, extrusion dies, shear blades, plastic-mold and cold-work tooling.

Uses

Powder/HSS: preheat 800–850 °C, austenitize 1180–1230 °C (salt or vacuum), quench, triple temper 540–570 °C to ≈64–66 HRC.

Heat Treatment

Risk of quench cracking and distortion — use graded preheating, controlled cooling and multiple tempers. Avoid overheating the austenitizing temperature. Machine in the soft annealed condition; allow for dimensional change after heat treatment. Grind with coolant to prevent rehardening cracks.

Precautions

DIN 1.3355 / JIS SKH2 / GB W18Cr4V

Request a Quote Back to category

Comments 0