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S31277 Stainless Steel vs. AISI 420F Stainless Steel

Both S31277 stainless steel and AISI 420F stainless steel are iron alloys. Both are furnished in the annealed condition. They have 55% 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 S31277 stainless steel and the bottom bar is AISI 420F stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 210
190
Elongation at Break, % 45
18
Fatigue Strength, MPa 380
270
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 80
76
Shear Strength, MPa 600
460
Tensile Strength: Ultimate (UTS), MPa 860
740
Tensile Strength: Yield (Proof), MPa 410
430

Thermal Properties

Latent Heat of Fusion, J/g 310
270
Maximum Temperature: Corrosion, °C 430
390
Maximum Temperature: Mechanical, °C 1100
760
Melting Completion (Liquidus), °C 1460
1440
Melting Onset (Solidus), °C 1410
1390
Specific Heat Capacity, J/kg-K 460
480
Thermal Expansion, µm/m-K 16
10

Otherwise Unclassified Properties

Base Metal Price, % relative 36
7.0
Density, g/cm3 8.1
7.7
Embodied Carbon, kg CO2/kg material 6.7
2.0
Embodied Energy, MJ/kg 90
28
Embodied Water, L/kg 220
100

Common Calculations

PREN (Pitting Resistance) 51
14
Resilience: Ultimate (Unit Rupture Work), MJ/m3 320
120
Resilience: Unit (Modulus of Resilience), kJ/m3 410
480
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 29
27
Strength to Weight: Bending, points 25
23
Thermal Shock Resistance, points 19
27

Alloy Composition

Carbon (C), % 0 to 0.020
0.3 to 0.4
Chromium (Cr), % 20.5 to 23
12 to 14
Copper (Cu), % 0.5 to 1.5
0
Iron (Fe), % 35.5 to 46.2
82.4 to 87.6
Manganese (Mn), % 0 to 3.0
0 to 1.3
Molybdenum (Mo), % 6.5 to 8.0
0 to 0.5
Nickel (Ni), % 26 to 28
0
Nitrogen (N), % 0.3 to 0.4
0
Phosphorus (P), % 0 to 0.030
0 to 0.060
Silicon (Si), % 0 to 0.5
0 to 1.0
Sulfur (S), % 0 to 0.010
0.15 to 0.35