W108 Special

W108 Special Tool Die Steels to SAE J 437 (1970)

W108 Special - Specification & Application

  • SAE J 437 (1970) - Selection and heat treatment of tool and die steels
  • SAE J 438 (1970) - Tool and die steels

Tool and die steels

Chemical composition(wt.%) of W108 Special grade: to SAE J 437 (1970)

Elements Min.（≥） Max.（≤） Similar Remarks
C 0.70 0.85
Si 0.10 0.40
Mn 0.10 0.40
Cr - -
V - -

W108 Special - Detail

Tool and die steels

Mechanical properties of grade W108 Special SAE J 437 (1970)

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)
589 (≥) 357 (≥) 22 12 21 Solution and Aging, Annealing, Ausaging, Q+T,etc 234

Physical properties of grade W108 Special SAE J 437 (1970)

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
221 (≥) 421 (≥) 32 21 14 Solution and Aging, Annealing, Ausaging, Q+T,etc 211
Temp.
°C/°F		 Creep strain limit
(10000h)
(Rp1,0) N/mm2		 Creep rupture strength
(10000h)
(Rp1,0) N/mm2
477 482 864

Equivalent Grade

1 W108 Commerial 2 W108 Standard 3 W108 Extra 4 W108 Special

Equivalent Products

Product shapes we supply:

We can customize the production of W108 Special grade, contact us for the best solution.
–sales@specificsteel.com