L4 Tool Die Steels

L4 - Specification & Application

Low Alloy Tool Steel

Chemical composition(wt.%) of L4 grade:

Elements Min.(≥) Max.(≤) Similar Remarks
C 0.90 1.10
Si 0.10 0.40
Mn 0.50 0.70
Cr 1.45 1.55
Mo - -
V 0.20 0.30
W - -

L4 - Detail

Low Alloy Tool Steel

Mechanical properties of grade L4

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)
458 (≥) 954 (≥) 42 41 44 Solution and Aging, Annealing, Ausaging, Q+T,etc 233

Physical properties of grade L4

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
581 (≥) 433 (≥) 42 13 11 Solution and Aging, Annealing, Ausaging, Q+T,etc 342
Temp.
°C/°F
Creep strain limit
(10000h)
(Rp1,0) N/mm2
Creep rupture strength
(10000h)
(Rp1,0) N/mm2
363 858 671
We can customize the production of L4 grade, contact us for the best solution.
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