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SAE-AISI 9255 Steel vs. SAE-AISI H14 Steel

Both SAE-AISI 9255 steel and SAE-AISI H14 steel are iron alloys. They have 90% of their average alloy composition in common. There are 23 material properties with values for both materials. Properties with values for just one material (9, in this case) are not shown.

For each property being compared, the top bar is SAE-AISI 9255 steel and the bottom bar is SAE-AISI H14 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
190
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 72
75
Tensile Strength: Ultimate (UTS), MPa 680
710 to 2030

Thermal Properties

Latent Heat of Fusion, J/g 280
270
Melting Completion (Liquidus), °C 1430
1530
Melting Onset (Solidus), °C 1390
1490
Specific Heat Capacity, J/kg-K 480
460
Thermal Conductivity, W/m-K 46
35
Thermal Expansion, µm/m-K 13
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.4
9.3
Electrical Conductivity: Equal Weight (Specific), % IACS 8.6
10

Otherwise Unclassified Properties

Base Metal Price, % relative 2.0
15
Density, g/cm3 7.7
8.1
Embodied Carbon, kg CO2/kg material 1.5
2.7
Embodied Energy, MJ/kg 20
39
Embodied Water, L/kg 46
73

Common Calculations

Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 24
24 to 69
Strength to Weight: Bending, points 22
22 to 44
Thermal Diffusivity, mm2/s 13
9.3
Thermal Shock Resistance, points 21
24 to 68

Alloy Composition

Carbon (C), % 0.51 to 0.59
0.35 to 0.45
Chromium (Cr), % 0
4.8 to 5.5
Copper (Cu), % 0
0 to 0.25
Iron (Fe), % 96.2 to 97
86.5 to 89.9
Manganese (Mn), % 0.7 to 1.0
0.2 to 0.5
Nickel (Ni), % 0
0 to 0.3
Phosphorus (P), % 0 to 0.035
0 to 0.030
Silicon (Si), % 1.8 to 2.2
0.8 to 1.2
Sulfur (S), % 0 to 0.040
0 to 0.030
Tungsten (W), % 0
4.0 to 5.3