Cr12 Tool Die Steels to GB/T 1229-2000

Cr12 - Specification & Application

  • GB/T 1229-2000 - Round bar, Wire,

Often used in the manufacture of small bear impact load and wear resistance of high cold cold punching die, punch, shear knife, cold roll, drill sets and wire drawing die, as well as the gauge, model, the CAM pin, eccentric wheel, etc

Chemical composition(wt.%) of Cr12 grade: to GB/T 1229-2000

Elements Min.(≥) Max.(≤) Similar Remarks
C 2.00 2.30
Si - 0.40
Mn - 0.40
Cr 11.50 13.00

Cr12 - Detail

Wide application of cold working die steel with high strength, hardenability and abrasion resistance, quenching deformation;But the impact toughness is poorer, brittle crack, easy to form the uneven eutectic carbides, poor thermal conductivity and high temperature plastic also

Mechanical properties of grade Cr12 GB/T 1229-2000

Proof strength
Rp0.2 (MPa)
Tensile strength
Rm (MPa)
Impact energy
KV (J)
Elongation at fracture
A (%)
Reduction in cross section on fracture
Z (%)
As-Heat-Treated Condition Brinell hardness (HBW)
493 (≥) 212 (≥) 34 34 32 Solution and Aging, Annealing, Ausaging, Q+T,etc 341

Physical properties of grade Cr12 GB/T 1229-2000

Property Density
kg/dm3
Temperature T
°C/F
Specific heat
J / kgK
Thermal conductivity
W/mK
Electric resistance
µΩ·cm
Modulus of elasticity
kN/mm2
Expansion rate
116 (≥) 753 (≥) 13 24 13 Solution and Aging, Annealing, Ausaging, Q+T,etc 344
Temp.
°C/°F
Creep strain limit
(10000h)
(Rp1,0) N/mm2
Creep rupture strength
(10000h)
(Rp1,0) N/mm2
549 728 777
We can customize the production of Cr12 grade, contact us for the best solution.
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