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ACI-ASTM CG8M Steel vs. AISI 316L Stainless Steel

Both ACI-ASTM CG8M steel and AISI 316L stainless steel are iron alloys. They have a very high 96% of their average alloy composition in common. There are 32 material properties with values for both materials. Properties with values for just one material (4, in this case) are not shown.

For each property being compared, the top bar is ACI-ASTM CG8M steel and the bottom bar is AISI 316L stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 180
170 to 350
Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 45
9.0 to 50
Fatigue Strength, MPa 280
170 to 450
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 79
78
Tensile Strength: Ultimate (UTS), MPa 550
530 to 1160
Tensile Strength: Yield (Proof), MPa 300
190 to 870

Thermal Properties

Latent Heat of Fusion, J/g 300
290
Maximum Temperature: Corrosion, °C 420
410
Maximum Temperature: Mechanical, °C 1020
870
Melting Completion (Liquidus), °C 1450
1400
Melting Onset (Solidus), °C 1400
1380
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 16
15
Thermal Expansion, µm/m-K 16
16

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.0
2.3
Electrical Conductivity: Equal Weight (Specific), % IACS 2.3
2.6

Otherwise Unclassified Properties

Base Metal Price, % relative 20
19
Density, g/cm3 7.9
7.9
Embodied Carbon, kg CO2/kg material 4.1
3.9
Embodied Energy, MJ/kg 56
53
Embodied Water, L/kg 160
150

Common Calculations

PREN (Pitting Resistance) 31
26
Resilience: Ultimate (Unit Rupture Work), MJ/m3 210
77 to 230
Resilience: Unit (Modulus of Resilience), kJ/m3 220
93 to 1880
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 19
19 to 41
Strength to Weight: Bending, points 19
18 to 31
Thermal Diffusivity, mm2/s 4.3
4.1
Thermal Shock Resistance, points 12
12 to 25

Alloy Composition

Carbon (C), % 0 to 0.080
0 to 0.030
Chromium (Cr), % 18 to 21
16 to 18
Iron (Fe), % 58.8 to 70
62 to 72
Manganese (Mn), % 0 to 1.5
0 to 2.0
Molybdenum (Mo), % 3.0 to 4.0
2.0 to 3.0
Nickel (Ni), % 9.0 to 13
10 to 14
Nitrogen (N), % 0
0 to 0.1
Phosphorus (P), % 0 to 0.040
0 to 0.045
Silicon (Si), % 0 to 1.5
0 to 0.75
Sulfur (S), % 0 to 0.040
0 to 0.030