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S15500 Stainless Steel vs. SAE-AISI 1021 Steel

Both S15500 stainless steel and SAE-AISI 1021 steel are iron alloys. They have 76% of their average alloy composition in common. There are 32 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 S15500 stainless steel and the bottom bar is SAE-AISI 1021 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 290 to 430
130 to 150
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 6.8 to 16
17 to 27
Fatigue Strength, MPa 350 to 650
190 to 300
Poisson's Ratio 0.28
0.29
Reduction in Area, % 17 to 40
46 to 54
Shear Modulus, GPa 75
73
Shear Strength, MPa 540 to 870
310 to 320
Tensile Strength: Ultimate (UTS), MPa 890 to 1490
480 to 530
Tensile Strength: Yield (Proof), MPa 590 to 1310
260 to 450

Thermal Properties

Latent Heat of Fusion, J/g 280
250
Maximum Temperature: Mechanical, °C 820
400
Melting Completion (Liquidus), °C 1430
1460
Melting Onset (Solidus), °C 1380
1420
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 17
52
Thermal Expansion, µm/m-K 11
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.2
7.0
Electrical Conductivity: Equal Weight (Specific), % IACS 2.5
8.0

Otherwise Unclassified Properties

Base Metal Price, % relative 13
1.8
Density, g/cm3 7.8
7.9
Embodied Carbon, kg CO2/kg material 2.7
1.4
Embodied Energy, MJ/kg 39
18
Embodied Water, L/kg 130
46

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 98 to 120
84 to 110
Resilience: Unit (Modulus of Resilience), kJ/m3 890 to 4460
180 to 530
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 32 to 53
17 to 19
Strength to Weight: Bending, points 26 to 37
17 to 18
Thermal Diffusivity, mm2/s 4.6
14
Thermal Shock Resistance, points 30 to 50
15 to 17

Alloy Composition

Carbon (C), % 0 to 0.070
0.18 to 0.23
Chromium (Cr), % 14 to 15.5
0
Copper (Cu), % 2.5 to 4.5
0
Iron (Fe), % 71.9 to 79.9
98.8 to 99.22
Manganese (Mn), % 0 to 1.0
0.6 to 0.9
Nickel (Ni), % 3.5 to 5.5
0
Niobium (Nb), % 0.15 to 0.45
0
Phosphorus (P), % 0 to 0.040
0 to 0.040
Silicon (Si), % 0 to 1.0
0
Sulfur (S), % 0 to 0.030
0 to 0.050