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S21904 Stainless Steel vs. S31277 Stainless Steel

Both S21904 stainless steel and S31277 stainless steel are iron alloys. They have 70% of their average alloy composition in common. There are 28 material properties with values for both materials. Properties with values for just one material (5, in this case) are not shown.

For each property being compared, the top bar is S21904 stainless steel and the bottom bar is S31277 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
210
Elongation at Break, % 17 to 51
45
Fatigue Strength, MPa 380 to 550
380
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 78
80
Shear Strength, MPa 510 to 620
600
Tensile Strength: Ultimate (UTS), MPa 700 to 1000
860
Tensile Strength: Yield (Proof), MPa 390 to 910
410

Thermal Properties

Latent Heat of Fusion, J/g 290
310
Maximum Temperature: Corrosion, °C 430
430
Maximum Temperature: Mechanical, °C 980
1100
Melting Completion (Liquidus), °C 1400
1460
Melting Onset (Solidus), °C 1350
1410
Specific Heat Capacity, J/kg-K 480
460
Thermal Expansion, µm/m-K 17
16

Otherwise Unclassified Properties

Base Metal Price, % relative 15
36
Density, g/cm3 7.7
8.1
Embodied Carbon, kg CO2/kg material 3.0
6.7
Embodied Energy, MJ/kg 43
90
Embodied Water, L/kg 160
220

Common Calculations

PREN (Pitting Resistance) 25
51
Resilience: Ultimate (Unit Rupture Work), MJ/m3 160 to 310
320
Resilience: Unit (Modulus of Resilience), kJ/m3 380 to 2070
410
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 25 to 36
29
Strength to Weight: Bending, points 23 to 29
25
Thermal Shock Resistance, points 15 to 21
19

Alloy Composition

Carbon (C), % 0 to 0.040
0 to 0.020
Chromium (Cr), % 19 to 21.5
20.5 to 23
Copper (Cu), % 0
0.5 to 1.5
Iron (Fe), % 59.5 to 67.4
35.5 to 46.2
Manganese (Mn), % 8.0 to 10
0 to 3.0
Molybdenum (Mo), % 0
6.5 to 8.0
Nickel (Ni), % 5.5 to 7.5
26 to 28
Nitrogen (N), % 0.15 to 0.4
0.3 to 0.4
Phosphorus (P), % 0 to 0.045
0 to 0.030
Silicon (Si), % 0 to 1.0
0 to 0.5
Sulfur (S), % 0 to 0.030
0 to 0.010