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ASTM A387 Grade 12 Steel vs. S39274 Stainless Steel

Both ASTM A387 grade 12 steel and S39274 stainless steel are iron alloys. They have 64% 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 S39274 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 140 to 160
270
Elastic (Young's, Tensile) Modulus, GPa 190
210
Elongation at Break, % 25
17
Fatigue Strength, MPa 190 to 230
380
Poisson's Ratio 0.29
0.27
Shear Modulus, GPa 73
81
Shear Strength, MPa 300 to 330
560
Tensile Strength: Ultimate (UTS), MPa 470 to 520
900
Tensile Strength: Yield (Proof), MPa 260 to 310
620

Thermal Properties

Latent Heat of Fusion, J/g 250
300
Maximum Temperature: Mechanical, °C 430
1100
Melting Completion (Liquidus), °C 1470
1480
Melting Onset (Solidus), °C 1420
1430
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 44
16
Thermal Expansion, µm/m-K 13
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.2
2.2
Electrical Conductivity: Equal Weight (Specific), % IACS 8.3
2.4

Otherwise Unclassified Properties

Base Metal Price, % relative 2.8
24
Density, g/cm3 7.8
8.0
Embodied Carbon, kg CO2/kg material 1.6
4.3
Embodied Energy, MJ/kg 21
60
Embodied Water, L/kg 51
180

Common Calculations

PREN (Pitting Resistance) 2.7
43
Resilience: Ultimate (Unit Rupture Work), MJ/m3 98 to 110
140
Resilience: Unit (Modulus of Resilience), kJ/m3 180 to 250
940
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 16 to 18
32
Strength to Weight: Bending, points 17 to 18
26
Thermal Diffusivity, mm2/s 12
4.2
Thermal Shock Resistance, points 14 to 15
25

Alloy Composition

Carbon (C), % 0.050 to 0.17
0 to 0.030
Chromium (Cr), % 0.8 to 1.2
24 to 26
Copper (Cu), % 0
0.2 to 0.8
Iron (Fe), % 97 to 98.2
57 to 65.6
Manganese (Mn), % 0.4 to 0.65
0 to 1.0
Molybdenum (Mo), % 0.45 to 0.6
2.5 to 3.5
Nickel (Ni), % 0
6.0 to 8.0
Nitrogen (N), % 0
0.24 to 0.32
Phosphorus (P), % 0 to 0.025
0 to 0.030
Silicon (Si), % 0.15 to 0.4
0 to 0.8
Sulfur (S), % 0 to 0.025
0 to 0.020
Tungsten (W), % 0
1.5 to 2.5