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AISI 445 Stainless Steel vs. S31727 Stainless Steel

Both AISI 445 stainless steel and S31727 stainless steel are iron alloys. Both are furnished in the annealed condition. They have 78% of their average alloy composition in common. There are 30 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 445 stainless steel and the bottom bar is S31727 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 160
190
Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 25
40
Fatigue Strength, MPa 160
240
Poisson's Ratio 0.28
0.28
Rockwell B Hardness 71
83
Shear Modulus, GPa 78
78
Shear Strength, MPa 310
430
Tensile Strength: Ultimate (UTS), MPa 480
630
Tensile Strength: Yield (Proof), MPa 230
270

Thermal Properties

Latent Heat of Fusion, J/g 290
290
Maximum Temperature: Corrosion, °C 480
420
Maximum Temperature: Mechanical, °C 950
1010
Melting Completion (Liquidus), °C 1440
1440
Melting Onset (Solidus), °C 1390
1390
Specific Heat Capacity, J/kg-K 480
470
Thermal Expansion, µm/m-K 11
16

Otherwise Unclassified Properties

Base Metal Price, % relative 12
24
Density, g/cm3 7.7
8.0
Embodied Carbon, kg CO2/kg material 2.6
4.7
Embodied Energy, MJ/kg 38
64
Embodied Water, L/kg 130
180

Common Calculations

PREN (Pitting Resistance) 20
35
Resilience: Ultimate (Unit Rupture Work), MJ/m3 98
200
Resilience: Unit (Modulus of Resilience), kJ/m3 140
190
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 17
22
Strength to Weight: Bending, points 18
20
Thermal Shock Resistance, points 16
14

Alloy Composition

Carbon (C), % 0 to 0.020
0 to 0.030
Chromium (Cr), % 19 to 21
17.5 to 19
Copper (Cu), % 0.3 to 0.6
2.8 to 4.0
Iron (Fe), % 74.9 to 80.7
53.7 to 61.3
Manganese (Mn), % 0 to 1.0
0 to 1.0
Molybdenum (Mo), % 0
3.8 to 4.5
Nickel (Ni), % 0 to 0.6
14.5 to 16.5
Niobium (Nb), % 0 to 0.8
0
Nitrogen (N), % 0 to 0.030
0.15 to 0.21
Phosphorus (P), % 0 to 0.040
0 to 0.030
Silicon (Si), % 0 to 1.0
0 to 1.0
Sulfur (S), % 0 to 0.012
0 to 0.030