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AISI 440B Stainless Steel vs. S31277 Stainless Steel

Both AISI 440B stainless steel and S31277 stainless steel are iron alloys. They have 59% of their average alloy composition in common. There are 27 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 AISI 440B 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, % 3.0 to 18
45
Fatigue Strength, MPa 260 to 850
380
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 77
80
Shear Strength, MPa 460 to 1110
600
Tensile Strength: Ultimate (UTS), MPa 740 to 1930
860
Tensile Strength: Yield (Proof), MPa 430 to 1860
410

Thermal Properties

Latent Heat of Fusion, J/g 280
310
Maximum Temperature: Corrosion, °C 390
430
Maximum Temperature: Mechanical, °C 870
1100
Melting Completion (Liquidus), °C 1480
1460
Melting Onset (Solidus), °C 1370
1410
Specific Heat Capacity, J/kg-K 480
460
Thermal Expansion, µm/m-K 10
16

Otherwise Unclassified Properties

Base Metal Price, % relative 9.0
36
Density, g/cm3 7.7
8.1
Embodied Carbon, kg CO2/kg material 2.2
6.7
Embodied Energy, MJ/kg 31
90
Embodied Water, L/kg 120
220

Common Calculations

PREN (Pitting Resistance) 18
51
Resilience: Ultimate (Unit Rupture Work), MJ/m3 57 to 110
320
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 27 to 70
29
Strength to Weight: Bending, points 24 to 45
25
Thermal Shock Resistance, points 27 to 70
19

Alloy Composition

Carbon (C), % 0.75 to 1.0
0 to 0.020
Chromium (Cr), % 16 to 18
20.5 to 23
Copper (Cu), % 0
0.5 to 1.5
Iron (Fe), % 78.2 to 83.3
35.5 to 46.2
Manganese (Mn), % 0 to 1.0
0 to 3.0
Molybdenum (Mo), % 0 to 0.75
6.5 to 8.0
Nickel (Ni), % 0
26 to 28
Nitrogen (N), % 0
0.3 to 0.4
Phosphorus (P), % 0 to 0.040
0 to 0.030
Silicon (Si), % 0 to 1.0
0 to 0.5
Sulfur (S), % 0 to 0.015
0 to 0.010