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S21800 Stainless Steel vs. ASTM A387 Grade 11 Steel

Both S21800 stainless steel and ASTM A387 grade 11 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 S21800 stainless steel and the bottom bar is ASTM A387 grade 11 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 210
150 to 180
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 40
25
Fatigue Strength, MPa 330
200 to 250
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 75
73
Shear Strength, MPa 510
320 to 390
Tensile Strength: Ultimate (UTS), MPa 740
500 to 600
Tensile Strength: Yield (Proof), MPa 390
270 to 350

Thermal Properties

Latent Heat of Fusion, J/g 340
260
Maximum Temperature: Mechanical, °C 900
430
Melting Completion (Liquidus), °C 1360
1460
Melting Onset (Solidus), °C 1310
1420
Specific Heat Capacity, J/kg-K 500
470
Thermal Expansion, µm/m-K 16
13

Otherwise Unclassified Properties

Base Metal Price, % relative 15
2.9
Density, g/cm3 7.5
7.8
Embodied Carbon, kg CO2/kg material 3.1
1.6
Embodied Energy, MJ/kg 45
21
Embodied Water, L/kg 150
53

Common Calculations

PREN (Pitting Resistance) 19
3.1
Resilience: Ultimate (Unit Rupture Work), MJ/m3 250
100 to 130
Resilience: Unit (Modulus of Resilience), kJ/m3 390
200 to 320
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 26
24
Strength to Weight: Axial, points 27
18 to 21
Strength to Weight: Bending, points 24
18 to 20
Thermal Shock Resistance, points 17
15 to 18

Alloy Composition

Carbon (C), % 0 to 0.1
0.050 to 0.17
Chromium (Cr), % 16 to 18
1.0 to 1.5
Iron (Fe), % 59.1 to 65.4
96.2 to 97.6
Manganese (Mn), % 7.0 to 9.0
0.4 to 0.65
Molybdenum (Mo), % 0
0.45 to 0.65
Nickel (Ni), % 8.0 to 9.0
0
Nitrogen (N), % 0.080 to 0.18
0
Phosphorus (P), % 0 to 0.060
0 to 0.025
Silicon (Si), % 3.5 to 4.5
0.5 to 0.8
Sulfur (S), % 0 to 0.030
0 to 0.025