9CrWMn

Other

9CrWMn

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 (%)

C0.85
SI0.4
MN0.9
CR0.5
W0.5
P0.03
S0.03

Mechanical Properties

Hardness(annealed):≤217 HB;Hardness(hardened):58-63 HRC

Chinese Standard

T 1299 9CrWMn

Equivalent Grades

GB Cr12 / DIN 1.2080 / JIS SKD1

Applications

高碳高铬冷作模具钢。,"Bar

Available Forms

Block"

Uses

Low-alloy engineering steel with enhanced hardenability and strength from alloying elements. Chromium (≈0.65%) improves hardenability, wear and corrosion resistance. Applied to gears, shafts, bolts, connecting rods, pressure parts and heavy forgings in automotive, energy and machinery sectors.

Heat Treatment

Austenitize at 760–820 °C and quench (oil/water) then temper at 150–400 °C for high hardness; spheroidize anneal (680–720 °C) improves machinability of the as-rolled bar.

Precautions

Preheat and control interpass temperature when welding; post-weld heat treatment or stress relief is recommended to avoid hard-zone cracking. Use low-hydrogen electrodes. Protect from decarburization during heating (controlled atmosphere or protective coating).

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