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ASTM A387 Grade 2 Steel vs. S32750 Stainless Steel

Both ASTM A387 grade 2 steel and S32750 stainless steel are iron alloys. They have 65% of their average alloy composition in common. There are 32 material properties with values for both materials. Properties with values for just one material (2, in this case) are not shown.

For each property being compared, the top bar is ASTM A387 grade 2 steel and the bottom bar is S32750 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 140 to 170
270
Elastic (Young's, Tensile) Modulus, GPa 190
210
Elongation at Break, % 25
17
Fatigue Strength, MPa 190 to 250
360
Poisson's Ratio 0.29
0.27
Shear Modulus, GPa 73
81
Shear Strength, MPa 300 to 350
530
Tensile Strength: Ultimate (UTS), MPa 470 to 550
860
Tensile Strength: Yield (Proof), MPa 260 to 350
590

Thermal Properties

Latent Heat of Fusion, J/g 250
300
Maximum Temperature: Mechanical, °C 420
1100
Melting Completion (Liquidus), °C 1470
1450
Melting Onset (Solidus), °C 1420
1400
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 45
15
Thermal Expansion, µm/m-K 13
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.2
2.2
Electrical Conductivity: Equal Weight (Specific), % IACS 8.3
2.5

Otherwise Unclassified Properties

Base Metal Price, % relative 2.6
21
Density, g/cm3 7.9
7.8
Embodied Carbon, kg CO2/kg material 1.6
4.1
Embodied Energy, MJ/kg 20
56
Embodied Water, L/kg 50
180

Common Calculations

PREN (Pitting Resistance) 2.4
43
Resilience: Ultimate (Unit Rupture Work), MJ/m3 98 to 120
130
Resilience: Unit (Modulus of Resilience), kJ/m3 180 to 320
860
Stiffness to Weight: Axial, points 13
15
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 16 to 20
31
Strength to Weight: Bending, points 17 to 19
26
Thermal Diffusivity, mm2/s 12
4.0
Thermal Shock Resistance, points 14 to 16
25

Alloy Composition

Carbon (C), % 0.050 to 0.21
0 to 0.030
Chromium (Cr), % 0.5 to 0.8
24 to 26
Copper (Cu), % 0
0 to 0.5
Iron (Fe), % 97.1 to 98.3
58.1 to 66.8
Manganese (Mn), % 0.55 to 0.8
0 to 1.2
Molybdenum (Mo), % 0.45 to 0.6
3.0 to 5.0
Nickel (Ni), % 0
6.0 to 8.0
Nitrogen (N), % 0
0.24 to 0.32
Phosphorus (P), % 0 to 0.025
0 to 0.035
Silicon (Si), % 0.15 to 0.4
0 to 0.8
Sulfur (S), % 0 to 0.025
0 to 0.020