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ASTM A387 Grade 12 Steel vs. S20161 Stainless Steel

Both ASTM A387 grade 12 steel and S20161 stainless steel are iron alloys. They have 72% of their average alloy composition in common. There are 32 material properties with values for both materials. Properties with values for just one material (3, in this case) are not shown.

For each property being compared, the top bar is ASTM A387 grade 12 steel and the bottom bar is S20161 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 140 to 160
250
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 25
46
Fatigue Strength, MPa 190 to 230
360
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 73
76
Shear Strength, MPa 300 to 330
690
Tensile Strength: Ultimate (UTS), MPa 470 to 520
980
Tensile Strength: Yield (Proof), MPa 260 to 310
390

Thermal Properties

Latent Heat of Fusion, J/g 250
330
Maximum Temperature: Mechanical, °C 430
870
Melting Completion (Liquidus), °C 1470
1380
Melting Onset (Solidus), °C 1420
1330
Specific Heat Capacity, J/kg-K 470
490
Thermal Conductivity, W/m-K 44
15
Thermal Expansion, µm/m-K 13
16

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.2
2.5
Electrical Conductivity: Equal Weight (Specific), % IACS 8.3
2.9

Otherwise Unclassified Properties

Base Metal Price, % relative 2.8
12
Density, g/cm3 7.8
7.5
Embodied Carbon, kg CO2/kg material 1.6
2.7
Embodied Energy, MJ/kg 21
39
Embodied Water, L/kg 51
130

Common Calculations

PREN (Pitting Resistance) 2.7
19
Resilience: Ultimate (Unit Rupture Work), MJ/m3 98 to 110
360
Resilience: Unit (Modulus of Resilience), kJ/m3 180 to 250
390
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
26
Strength to Weight: Axial, points 16 to 18
36
Strength to Weight: Bending, points 17 to 18
29
Thermal Diffusivity, mm2/s 12
4.0
Thermal Shock Resistance, points 14 to 15
22

Alloy Composition

Carbon (C), % 0.050 to 0.17
0 to 0.15
Chromium (Cr), % 0.8 to 1.2
15 to 18
Iron (Fe), % 97 to 98.2
65.6 to 73.9
Manganese (Mn), % 0.4 to 0.65
4.0 to 6.0
Molybdenum (Mo), % 0.45 to 0.6
0
Nickel (Ni), % 0
4.0 to 6.0
Nitrogen (N), % 0
0.080 to 0.2
Phosphorus (P), % 0 to 0.025
0 to 0.040
Silicon (Si), % 0.15 to 0.4
3.0 to 4.0
Sulfur (S), % 0 to 0.025
0 to 0.040