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S28200 Stainless Steel vs. ASTM A387 Grade 21 Steel

Both S28200 stainless steel and ASTM A387 grade 21 steel are iron alloys. They have 66% of their average alloy composition in common. There are 28 material properties with values for both materials. Properties with values for just one material (6, in this case) are not shown.

For each property being compared, the top bar is S28200 stainless steel and the bottom bar is ASTM A387 grade 21 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 260
150 to 180
Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 45
21
Fatigue Strength, MPa 430
160 to 250
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 77
74
Shear Strength, MPa 610
310 to 370
Tensile Strength: Ultimate (UTS), MPa 870
500 to 590
Tensile Strength: Yield (Proof), MPa 460
230 to 350

Thermal Properties

Latent Heat of Fusion, J/g 290
260
Maximum Temperature: Mechanical, °C 900
480
Melting Completion (Liquidus), °C 1380
1470
Melting Onset (Solidus), °C 1330
1430
Specific Heat Capacity, J/kg-K 480
470
Thermal Expansion, µm/m-K 18
13

Otherwise Unclassified Properties

Base Metal Price, % relative 12
4.1
Density, g/cm3 7.6
7.9
Embodied Carbon, kg CO2/kg material 2.8
1.8
Embodied Energy, MJ/kg 41
23
Embodied Water, L/kg 160
62

Common Calculations

PREN (Pitting Resistance) 29
6.4
Resilience: Ultimate (Unit Rupture Work), MJ/m3 330
84 to 110
Resilience: Unit (Modulus of Resilience), kJ/m3 540
140 to 320
Stiffness to Weight: Axial, points 15
13
Stiffness to Weight: Bending, points 26
24
Strength to Weight: Axial, points 32
18 to 21
Strength to Weight: Bending, points 27
18 to 20
Thermal Shock Resistance, points 17
14 to 17

Alloy Composition

Carbon (C), % 0 to 0.15
0.050 to 0.15
Chromium (Cr), % 17 to 19
2.8 to 3.3
Copper (Cu), % 0.75 to 1.3
0
Iron (Fe), % 57.7 to 64.1
94.4 to 96
Manganese (Mn), % 17 to 19
0.3 to 0.6
Molybdenum (Mo), % 0.75 to 1.3
0.9 to 1.1
Nitrogen (N), % 0.4 to 0.6
0
Phosphorus (P), % 0 to 0.045
0 to 0.025
Silicon (Si), % 0 to 1.0
0 to 0.5
Sulfur (S), % 0 to 0.030
0 to 0.025