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S31727 Stainless Steel vs. ASTM A387 Grade 2 Steel

Both S31727 stainless steel and ASTM A387 grade 2 steel are iron alloys. They have 59% of their average alloy composition in common. There are 28 material properties with values for both materials. Properties with values for just one material (7, in this case) are not shown.

For each property being compared, the top bar is S31727 stainless steel and the bottom bar is ASTM A387 grade 2 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 190
140 to 170
Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 40
25
Fatigue Strength, MPa 240
190 to 250
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 78
73
Shear Strength, MPa 430
300 to 350
Tensile Strength: Ultimate (UTS), MPa 630
470 to 550
Tensile Strength: Yield (Proof), MPa 270
260 to 350

Thermal Properties

Latent Heat of Fusion, J/g 290
250
Maximum Temperature: Mechanical, °C 1010
420
Melting Completion (Liquidus), °C 1440
1470
Melting Onset (Solidus), °C 1390
1420
Specific Heat Capacity, J/kg-K 470
470
Thermal Expansion, µm/m-K 16
13

Otherwise Unclassified Properties

Base Metal Price, % relative 24
2.6
Density, g/cm3 8.0
7.9
Embodied Carbon, kg CO2/kg material 4.7
1.6
Embodied Energy, MJ/kg 64
20
Embodied Water, L/kg 180
50

Common Calculations

PREN (Pitting Resistance) 35
2.4
Resilience: Ultimate (Unit Rupture Work), MJ/m3 200
98 to 120
Resilience: Unit (Modulus of Resilience), kJ/m3 190
180 to 320
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 22
16 to 20
Strength to Weight: Bending, points 20
17 to 19
Thermal Shock Resistance, points 14
14 to 16

Alloy Composition

Carbon (C), % 0 to 0.030
0.050 to 0.21
Chromium (Cr), % 17.5 to 19
0.5 to 0.8
Copper (Cu), % 2.8 to 4.0
0
Iron (Fe), % 53.7 to 61.3
97.1 to 98.3
Manganese (Mn), % 0 to 1.0
0.55 to 0.8
Molybdenum (Mo), % 3.8 to 4.5
0.45 to 0.6
Nickel (Ni), % 14.5 to 16.5
0
Nitrogen (N), % 0.15 to 0.21
0
Phosphorus (P), % 0 to 0.030
0 to 0.025
Silicon (Si), % 0 to 1.0
0.15 to 0.4
Sulfur (S), % 0 to 0.030
0 to 0.025