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ASTM A387 Grade 21L Class 1 vs. S20910 Stainless Steel

Both ASTM A387 grade 21L class 1 and S20910 stainless steel are iron alloys. They have 62% of their average alloy composition in common. There are 30 material properties with values for both materials. Properties with values for just one material (4, in this case) are not shown.

For each property being compared, the top bar is ASTM A387 grade 21L class 1 and the bottom bar is S20910 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 150
230 to 290
Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 21
14 to 39
Fatigue Strength, MPa 160
310 to 460
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 74
79
Shear Strength, MPa 310
500 to 570
Tensile Strength: Ultimate (UTS), MPa 500
780 to 940
Tensile Strength: Yield (Proof), MPa 230
430 to 810

Thermal Properties

Latent Heat of Fusion, J/g 260
300
Maximum Temperature: Mechanical, °C 480
1080
Melting Completion (Liquidus), °C 1470
1420
Melting Onset (Solidus), °C 1430
1380
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 41
13
Thermal Expansion, µm/m-K 13
16

Otherwise Unclassified Properties

Base Metal Price, % relative 4.1
22
Density, g/cm3 7.9
7.8
Embodied Carbon, kg CO2/kg material 1.8
4.8
Embodied Energy, MJ/kg 23
68
Embodied Water, L/kg 62
180

Common Calculations

PREN (Pitting Resistance) 6.4
34
Resilience: Ultimate (Unit Rupture Work), MJ/m3 84
120 to 260
Resilience: Unit (Modulus of Resilience), kJ/m3 140
460 to 1640
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 18
28 to 33
Strength to Weight: Bending, points 18
24 to 27
Thermal Diffusivity, mm2/s 11
3.6
Thermal Shock Resistance, points 14
17 to 21

Alloy Composition

Carbon (C), % 0 to 0.1
0 to 0.060
Chromium (Cr), % 2.8 to 3.3
20.5 to 23.5
Iron (Fe), % 94.4 to 96.1
52.1 to 62.1
Manganese (Mn), % 0.3 to 0.6
4.0 to 6.0
Molybdenum (Mo), % 0.9 to 1.1
1.5 to 3.0
Nickel (Ni), % 0
11.5 to 13.5
Niobium (Nb), % 0
0.1 to 0.3
Nitrogen (N), % 0
0.2 to 0.4
Phosphorus (P), % 0 to 0.025
0 to 0.040
Silicon (Si), % 0 to 0.5
0 to 0.75
Sulfur (S), % 0 to 0.025
0 to 0.030
Vanadium (V), % 0
0.1 to 0.3