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S21900 Stainless Steel vs. SAE-AISI 1038 Steel

Both S21900 stainless steel and SAE-AISI 1038 steel are iron alloys. They have 64% of their average alloy composition in common. There are 32 material properties with values for both materials. Properties with values for just one material (2, in this case) are not shown.

For each property being compared, the top bar is S21900 stainless steel and the bottom bar is SAE-AISI 1038 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 220
170 to 180
Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 50
14 to 20
Fatigue Strength, MPa 380
220 to 350
Poisson's Ratio 0.28
0.29
Reduction in Area, % 57
40 to 45
Shear Modulus, GPa 78
73
Shear Strength, MPa 510
370 to 390
Tensile Strength: Ultimate (UTS), MPa 710
590 to 640
Tensile Strength: Yield (Proof), MPa 390
320 to 540

Thermal Properties

Latent Heat of Fusion, J/g 290
250
Maximum Temperature: Mechanical, °C 980
400
Melting Completion (Liquidus), °C 1400
1460
Melting Onset (Solidus), °C 1350
1420
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 14
51
Thermal Expansion, µm/m-K 17
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.5
7.0
Electrical Conductivity: Equal Weight (Specific), % IACS 2.9
8.0

Otherwise Unclassified Properties

Base Metal Price, % relative 15
1.8
Density, g/cm3 7.7
7.8
Embodied Carbon, kg CO2/kg material 3.0
1.4
Embodied Energy, MJ/kg 43
18
Embodied Water, L/kg 160
46

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 300
83 to 100
Resilience: Unit (Modulus of Resilience), kJ/m3 380
270 to 790
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 26
21 to 23
Strength to Weight: Bending, points 23
20 to 21
Thermal Diffusivity, mm2/s 3.8
14
Thermal Shock Resistance, points 15
19 to 20

Alloy Composition

Carbon (C), % 0 to 0.080
0.35 to 0.42
Chromium (Cr), % 19 to 21.5
0
Iron (Fe), % 59.4 to 67.4
98.6 to 99.05
Manganese (Mn), % 8.0 to 10
0.6 to 0.9
Nickel (Ni), % 5.5 to 7.5
0
Nitrogen (N), % 0.15 to 0.4
0
Phosphorus (P), % 0 to 0.045
0 to 0.040
Silicon (Si), % 0 to 1.0
0
Sulfur (S), % 0 to 0.030
0 to 0.050