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S64512 Stainless Steel vs. S21800 Stainless Steel

Both S64512 stainless steel and S21800 stainless steel are iron alloys. They have 77% of their average alloy composition in common. There are 30 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 S64512 stainless steel and the bottom bar is S21800 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 330
210
Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 17
40
Fatigue Strength, MPa 540
330
Poisson's Ratio 0.28
0.28
Reduction in Area, % 34
62
Shear Modulus, GPa 76
75
Shear Strength, MPa 700
510
Tensile Strength: Ultimate (UTS), MPa 1140
740
Tensile Strength: Yield (Proof), MPa 890
390

Thermal Properties

Latent Heat of Fusion, J/g 270
340
Maximum Temperature: Corrosion, °C 390
410
Maximum Temperature: Mechanical, °C 750
900
Melting Completion (Liquidus), °C 1460
1360
Melting Onset (Solidus), °C 1420
1310
Specific Heat Capacity, J/kg-K 470
500
Thermal Expansion, µm/m-K 10
16

Otherwise Unclassified Properties

Base Metal Price, % relative 10
15
Density, g/cm3 7.8
7.5
Embodied Carbon, kg CO2/kg material 3.3
3.1
Embodied Energy, MJ/kg 47
45
Embodied Water, L/kg 110
150

Common Calculations

PREN (Pitting Resistance) 18
19
Resilience: Ultimate (Unit Rupture Work), MJ/m3 180
250
Resilience: Unit (Modulus of Resilience), kJ/m3 2020
390
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
26
Strength to Weight: Axial, points 40
27
Strength to Weight: Bending, points 31
24
Thermal Shock Resistance, points 42
17

Alloy Composition

Carbon (C), % 0.080 to 0.15
0 to 0.1
Chromium (Cr), % 11 to 12.5
16 to 18
Iron (Fe), % 80.6 to 84.7
59.1 to 65.4
Manganese (Mn), % 0.5 to 0.9
7.0 to 9.0
Molybdenum (Mo), % 1.5 to 2.0
0
Nickel (Ni), % 2.0 to 3.0
8.0 to 9.0
Nitrogen (N), % 0.010 to 0.050
0.080 to 0.18
Phosphorus (P), % 0 to 0.025
0 to 0.060
Silicon (Si), % 0 to 0.35
3.5 to 4.5
Sulfur (S), % 0 to 0.025
0 to 0.030
Vanadium (V), % 0.25 to 0.4
0