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SAE-AISI S6 Steel vs. SAE-AISI A6 Steel

Both SAE-AISI S6 steel and SAE-AISI A6 steel are iron alloys. They have a very high 97% of their average alloy composition in common.

For each property being compared, the top bar is SAE-AISI S6 steel and the bottom bar is SAE-AISI A6 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
73
Tensile Strength: Ultimate (UTS), MPa 670 to 1920
750 to 1990

Thermal Properties

Latent Heat of Fusion, J/g 290
250
Melting Completion (Liquidus), °C 1430
1460
Melting Onset (Solidus), °C 1390
1410
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 41
41
Thermal Expansion, µm/m-K 12
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.6
7.5
Electrical Conductivity: Equal Weight (Specific), % IACS 8.9
8.7

Otherwise Unclassified Properties

Base Metal Price, % relative 3.2
3.7
Density, g/cm3 7.7
7.8
Embodied Carbon, kg CO2/kg material 2.3
1.8
Embodied Energy, MJ/kg 33
24
Embodied Water, L/kg 56
57

Common Calculations

PREN (Pitting Resistance) 2.7
4.8
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 24 to 70
27 to 71
Strength to Weight: Bending, points 22 to 45
23 to 45
Thermal Diffusivity, mm2/s 11
11
Thermal Shock Resistance, points 22 to 64
25 to 65

Alloy Composition

Carbon (C), % 0.4 to 0.5
0.65 to 0.75
Chromium (Cr), % 1.2 to 1.5
0.9 to 1.2
Copper (Cu), % 0 to 0.25
0 to 0.25
Iron (Fe), % 92.8 to 94.7
93 to 95.8
Manganese (Mn), % 1.2 to 1.5
1.8 to 2.5
Molybdenum (Mo), % 0.3 to 0.5
0.9 to 1.4
Nickel (Ni), % 0
0 to 0.3
Phosphorus (P), % 0 to 0.030
0 to 0.030
Silicon (Si), % 2.0 to 2.5
0 to 0.5
Sulfur (S), % 0 to 0.030
0 to 0.030
Vanadium (V), % 0.2 to 0.4
0

Comparable Variants