3Cr2W8V

Other

3Cr2W8V

High-C high-Cr cold-work tool steel. (GB/T 1299; equiv GB Cr12 / DIN 1.2080 / JIS SKD1). Nominal values—confirm mill certificate.

Chemical Composition (%)

C0.3
SI0.4
MN0.2
CR2.2
W7.5
V0.2
P0.03
S0.03

Mechanical Properties

Hardness(annealed):≤241 HB;Hardness(hardened):48-52 HRC

Chinese Standard

T 1299 3Cr2W8V

Equivalent Grades

GB Cr12 / DIN 1.2080 / JIS SKD1

Applications

高碳高铬冷作模具钢。,"Bar

Available Forms

Block"

Uses

Tool and die steel for cutting, forming, punching and molding tools. Tungsten/molybdenum (≈8.25%/0%) give hot hardness and red-hardness for high-speed and hot-work tools. High chromium (≈2.45%) provides wear resistance and secondary hardening. Applied to blanks, punches, extrusion dies, shear blades, plastic-mold and cold-work tooling.

Heat Treatment

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

Precautions

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.

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