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S31277 Stainless Steel vs. ACI-ASTM CG8M Steel

Both S31277 stainless steel and ACI-ASTM CG8M steel are iron alloys. They have 76% of their average alloy composition in common. There are 27 material properties with values for both materials. Properties with values for just one material (7, in this case) are not shown.

For each property being compared, the top bar is S31277 stainless steel and the bottom bar is ACI-ASTM CG8M steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 210
200
Elongation at Break, % 45
45
Fatigue Strength, MPa 380
280
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 80
79
Tensile Strength: Ultimate (UTS), MPa 860
550
Tensile Strength: Yield (Proof), MPa 410
300

Thermal Properties

Latent Heat of Fusion, J/g 310
300
Maximum Temperature: Corrosion, °C 430
420
Maximum Temperature: Mechanical, °C 1100
1020
Melting Completion (Liquidus), °C 1460
1450
Melting Onset (Solidus), °C 1410
1400
Specific Heat Capacity, J/kg-K 460
470
Thermal Expansion, µm/m-K 16
16

Otherwise Unclassified Properties

Base Metal Price, % relative 36
20
Density, g/cm3 8.1
7.9
Embodied Carbon, kg CO2/kg material 6.7
4.1
Embodied Energy, MJ/kg 90
56
Embodied Water, L/kg 220
160

Common Calculations

PREN (Pitting Resistance) 51
31
Resilience: Ultimate (Unit Rupture Work), MJ/m3 320
210
Resilience: Unit (Modulus of Resilience), kJ/m3 410
220
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 29
19
Strength to Weight: Bending, points 25
19
Thermal Shock Resistance, points 19
12

Alloy Composition

Carbon (C), % 0 to 0.020
0 to 0.080
Chromium (Cr), % 20.5 to 23
18 to 21
Copper (Cu), % 0.5 to 1.5
0
Iron (Fe), % 35.5 to 46.2
58.8 to 70
Manganese (Mn), % 0 to 3.0
0 to 1.5
Molybdenum (Mo), % 6.5 to 8.0
3.0 to 4.0
Nickel (Ni), % 26 to 28
9.0 to 13
Nitrogen (N), % 0.3 to 0.4
0
Phosphorus (P), % 0 to 0.030
0 to 0.040
Silicon (Si), % 0 to 0.5
0 to 1.5
Sulfur (S), % 0 to 0.010
0 to 0.040