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S31727 Stainless Steel vs. AISI 442 Stainless Steel

Both S31727 stainless steel and AISI 442 stainless steel are iron alloys. Both are furnished in the annealed condition. They have 77% 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 S31727 stainless steel and the bottom bar is AISI 442 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 190
190
Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 40
23
Fatigue Strength, MPa 240
210
Poisson's Ratio 0.28
0.27
Rockwell B Hardness 83
83
Shear Modulus, GPa 78
78
Shear Strength, MPa 430
370
Tensile Strength: Ultimate (UTS), MPa 630
580
Tensile Strength: Yield (Proof), MPa 270
310

Thermal Properties

Latent Heat of Fusion, J/g 290
290
Maximum Temperature: Corrosion, °C 420
420
Maximum Temperature: Mechanical, °C 1010
960
Melting Completion (Liquidus), °C 1440
1430
Melting Onset (Solidus), °C 1390
1390
Specific Heat Capacity, J/kg-K 470
480
Thermal Expansion, µm/m-K 16
11

Otherwise Unclassified Properties

Base Metal Price, % relative 24
10
Density, g/cm3 8.0
7.7
Embodied Carbon, kg CO2/kg material 4.7
2.3
Embodied Energy, MJ/kg 64
32
Embodied Water, L/kg 180
130

Common Calculations

PREN (Pitting Resistance) 35
21
Resilience: Ultimate (Unit Rupture Work), MJ/m3 200
110
Resilience: Unit (Modulus of Resilience), kJ/m3 190
250
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 22
21
Strength to Weight: Bending, points 20
20
Thermal Shock Resistance, points 14
20

Alloy Composition

Carbon (C), % 0 to 0.030
0 to 0.2
Chromium (Cr), % 17.5 to 19
18 to 23
Copper (Cu), % 2.8 to 4.0
0
Iron (Fe), % 53.7 to 61.3
74.1 to 82
Manganese (Mn), % 0 to 1.0
0 to 1.0
Molybdenum (Mo), % 3.8 to 4.5
0
Nickel (Ni), % 14.5 to 16.5
0 to 0.6
Nitrogen (N), % 0.15 to 0.21
0
Phosphorus (P), % 0 to 0.030
0 to 0.040
Silicon (Si), % 0 to 1.0
0 to 1.0
Sulfur (S), % 0 to 0.030
0 to 0.040