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S31277 Stainless Steel vs. AISI 303 Stainless Steel

Both S31277 stainless steel and AISI 303 stainless steel are iron alloys. They have 69% of their average alloy composition in common. There are 28 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 S31277 stainless steel and the bottom bar is AISI 303 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 210
200
Elongation at Break, % 45
40 to 51
Fatigue Strength, MPa 380
230 to 360
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 80
77
Shear Strength, MPa 600
430 to 470
Tensile Strength: Ultimate (UTS), MPa 860
600 to 690
Tensile Strength: Yield (Proof), MPa 410
230 to 420

Thermal Properties

Latent Heat of Fusion, J/g 310
290
Maximum Temperature: Corrosion, °C 430
410
Maximum Temperature: Mechanical, °C 1100
930
Melting Completion (Liquidus), °C 1460
1450
Melting Onset (Solidus), °C 1410
1400
Specific Heat Capacity, J/kg-K 460
480
Thermal Expansion, µm/m-K 16
17

Otherwise Unclassified Properties

Base Metal Price, % relative 36
15
Density, g/cm3 8.1
7.8
Embodied Carbon, kg CO2/kg material 6.7
3.0
Embodied Energy, MJ/kg 90
42
Embodied Water, L/kg 220
140

Common Calculations

PREN (Pitting Resistance) 51
18
Resilience: Ultimate (Unit Rupture Work), MJ/m3 320
240
Resilience: Unit (Modulus of Resilience), kJ/m3 410
140 to 440
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 29
21 to 25
Strength to Weight: Bending, points 25
20 to 22
Thermal Shock Resistance, points 19
13 to 15

Alloy Composition

Carbon (C), % 0 to 0.020
0 to 0.15
Chromium (Cr), % 20.5 to 23
17 to 19
Copper (Cu), % 0.5 to 1.5
0
Iron (Fe), % 35.5 to 46.2
67.3 to 74.9
Manganese (Mn), % 0 to 3.0
0 to 2.0
Molybdenum (Mo), % 6.5 to 8.0
0
Nickel (Ni), % 26 to 28
8.0 to 10
Nitrogen (N), % 0.3 to 0.4
0
Phosphorus (P), % 0 to 0.030
0 to 0.2
Silicon (Si), % 0 to 0.5
0 to 1.0
Sulfur (S), % 0 to 0.010
0.15 to 0.35