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ASTM A387 Grade 2 Steel vs. S21600 Stainless Steel

Both ASTM A387 grade 2 steel and S21600 stainless steel are iron alloys. They have 65% 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 ASTM A387 grade 2 steel and the bottom bar is S21600 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 140 to 170
200
Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 25
46
Fatigue Strength, MPa 190 to 250
360
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 73
79
Shear Strength, MPa 300 to 350
500
Tensile Strength: Ultimate (UTS), MPa 470 to 550
710
Tensile Strength: Yield (Proof), MPa 260 to 350
390

Thermal Properties

Latent Heat of Fusion, J/g 250
290
Maximum Temperature: Mechanical, °C 420
990
Melting Completion (Liquidus), °C 1470
1420
Melting Onset (Solidus), °C 1420
1380
Specific Heat Capacity, J/kg-K 470
480
Thermal Expansion, µm/m-K 13
17

Otherwise Unclassified Properties

Base Metal Price, % relative 2.6
17
Density, g/cm3 7.9
7.7
Embodied Carbon, kg CO2/kg material 1.6
3.6
Embodied Energy, MJ/kg 20
50
Embodied Water, L/kg 50
160

Common Calculations

PREN (Pitting Resistance) 2.4
34
Resilience: Ultimate (Unit Rupture Work), MJ/m3 98 to 120
270
Resilience: Unit (Modulus of Resilience), kJ/m3 180 to 320
370
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 16 to 20
25
Strength to Weight: Bending, points 17 to 19
23
Thermal Shock Resistance, points 14 to 16
15

Alloy Composition

Carbon (C), % 0.050 to 0.21
0 to 0.080
Chromium (Cr), % 0.5 to 0.8
17.5 to 22
Iron (Fe), % 97.1 to 98.3
57.6 to 67.8
Manganese (Mn), % 0.55 to 0.8
7.5 to 9.0
Molybdenum (Mo), % 0.45 to 0.6
2.0 to 3.0
Nickel (Ni), % 0
5.0 to 7.0
Nitrogen (N), % 0
0.25 to 0.5
Phosphorus (P), % 0 to 0.025
0 to 0.045
Silicon (Si), % 0.15 to 0.4
0 to 0.75
Sulfur (S), % 0 to 0.025
0 to 0.030