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ACI-ASTM CG8M Steel vs. S35500 Stainless Steel

Both ACI-ASTM CG8M steel and S35500 stainless steel are iron alloys. They have 88% of their average alloy composition in common. There are 31 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 S35500 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 45
14
Fatigue Strength, MPa 280
690 to 730
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 79
78
Tensile Strength: Ultimate (UTS), MPa 550
1330 to 1490
Tensile Strength: Yield (Proof), MPa 300
1200 to 1280

Thermal Properties

Latent Heat of Fusion, J/g 300
280
Maximum Temperature: Corrosion, °C 420
440
Maximum Temperature: Mechanical, °C 1020
870
Melting Completion (Liquidus), °C 1450
1460
Melting Onset (Solidus), °C 1400
1420
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 16
16
Thermal Expansion, µm/m-K 16
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.0
2.2
Electrical Conductivity: Equal Weight (Specific), % IACS 2.3
2.5

Otherwise Unclassified Properties

Base Metal Price, % relative 20
16
Density, g/cm3 7.9
7.8
Embodied Carbon, kg CO2/kg material 4.1
3.5
Embodied Energy, MJ/kg 56
47
Embodied Water, L/kg 160
130

Common Calculations

PREN (Pitting Resistance) 31
27
Resilience: Ultimate (Unit Rupture Work), MJ/m3 210
180 to 190
Resilience: Unit (Modulus of Resilience), kJ/m3 220
3610 to 4100
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 19
47 to 53
Strength to Weight: Bending, points 19
34 to 37
Thermal Diffusivity, mm2/s 4.3
4.4
Thermal Shock Resistance, points 12
44 to 49

Alloy Composition

Carbon (C), % 0 to 0.080
0.1 to 0.15
Chromium (Cr), % 18 to 21
15 to 16
Iron (Fe), % 58.8 to 70
73.2 to 77.7
Manganese (Mn), % 0 to 1.5
0.5 to 1.3
Molybdenum (Mo), % 3.0 to 4.0
2.5 to 3.2
Nickel (Ni), % 9.0 to 13
4.0 to 5.0
Niobium (Nb), % 0
0.1 to 0.5
Nitrogen (N), % 0
0.070 to 0.13
Phosphorus (P), % 0 to 0.040
0 to 0.040
Silicon (Si), % 0 to 1.5
0 to 0.5
Sulfur (S), % 0 to 0.040
0 to 0.030