AISI W1 (T72301) Water-Hardening Steel
Tool Steels
Property Overview
Density7.8g/cm³
Elastic Modulus190GPa
Tensile Strength590 to 2320MPa
Yield StrengthUnknown
Brinell HardnessUnknown
Maximum Service TemperatureUnknown
Chemical Composition
C
0.7 to 1.5%
CR
0 to 0.15%
NI
0 to 0.2%
MO
0 to 0.1%
MN
0.35 to 0.73%
SI
0.1 to 0.4%
P
0 to 0.025%
S
0 to 0.025%
CU
0 to 0.2%
V
0 to 0.1%
W
0 to 0.15%
FE
96.4 to 98.9%
Mechanical
Elastic (Young's, Tensile) Modulus
190 GPa
Poisson's Ratio
0.29
Shear Modulus
72 GPa
Tensile Strength: Ultimate (UTS)
590 to 2320 MPa
Physical
Density
7.8 g/cm 3
Thermal
Latent Heat of Fusion
250 J/g
Melting Completion (Liquidus)
1450 °C
Melting Onset (Solidus)
1410 °C
Specific Heat Capacity
470 J/kg-K
Thermal Conductivity
48 W/m-K
Thermal Diffusivity
13 mm 2 /s
Thermal Expansion
10 µm/m-K
Thermal Shock Resistance
22 to 85 points
Electrical
Electrical Conductivity: Equal Volume
7.1 % IACS
Electrical Conductivity: Equal Weight (Specific)
8.2 % IACS
Calculated
Stiffness to Weight: Axial
13 points
Stiffness to Weight: Bending
24 points
Strength to Weight: Axial
21 to 83 points
Strength to Weight: Bending
20 to 50 points
Environmental
Base Metal Price
2.2 % relative
Embodied Carbon
1.6 kg CO 2 /kg material
Embodied Energy
21 MJ/kg
Embodied Energy
21 MJ/kg 9.2 x 10 3 BTU/lb
Embodied Water
47 L/kg
Embodied Water
47 L/kg 5.5 gal/lb
Registered Designations & Aliases
AISI W1 (T72301) Water-Hardening SteelT72301
Standards
ASTM A686 ASTM A686: Standard Specification for Tool Steel, Carbon
ASTM A686 ASTM A686: Standard Specification for Tool Steel, Carbon Tool Steels, 5th ed., George Roberts et al., 1998 Tool Steels: Properties and Performance, Rafael A. Mesquita (editor), 2016