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S31730 Stainless Steel vs. AISI 436 Stainless Steel

Both S31730 stainless steel and AISI 436 stainless steel are iron alloys. Both are furnished in the annealed condition. They have 76% of their average alloy composition in common. There are 30 material properties with values for both materials. Properties with values for just one material (4, in this case) are not shown.

For each property being compared, the top bar is S31730 stainless steel and the bottom bar is AISI 436 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 180
170
Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 40
25
Fatigue Strength, MPa 170
190
Poisson's Ratio 0.28
0.28
Rockwell B Hardness 78
77
Shear Modulus, GPa 77
77
Shear Strength, MPa 370
320
Tensile Strength: Ultimate (UTS), MPa 540
500
Tensile Strength: Yield (Proof), MPa 200
270

Thermal Properties

Latent Heat of Fusion, J/g 290
280
Maximum Temperature: Corrosion, °C 420
460
Maximum Temperature: Mechanical, °C 990
880
Melting Completion (Liquidus), °C 1430
1450
Melting Onset (Solidus), °C 1390
1410
Specific Heat Capacity, J/kg-K 470
480
Thermal Expansion, µm/m-K 16
10

Otherwise Unclassified Properties

Base Metal Price, % relative 24
12
Density, g/cm3 8.0
7.7
Embodied Carbon, kg CO2/kg material 4.6
2.7
Embodied Energy, MJ/kg 63
38
Embodied Water, L/kg 180
120

Common Calculations

PREN (Pitting Resistance) 30
20
Resilience: Ultimate (Unit Rupture Work), MJ/m3 170
110
Resilience: Unit (Modulus of Resilience), kJ/m3 99
190
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 19
18
Strength to Weight: Bending, points 18
18
Thermal Shock Resistance, points 12
18

Alloy Composition

Carbon (C), % 0 to 0.030
0 to 0.12
Chromium (Cr), % 17 to 19
16 to 18
Copper (Cu), % 4.0 to 5.0
0
Iron (Fe), % 52.4 to 61
77.8 to 83.3
Manganese (Mn), % 0 to 2.0
0 to 1.0
Molybdenum (Mo), % 3.0 to 4.0
0.75 to 1.3
Nickel (Ni), % 15 to 16.5
0
Niobium (Nb), % 0
0 to 0.8
Nitrogen (N), % 0 to 0.045
0
Phosphorus (P), % 0 to 0.040
0 to 0.040
Silicon (Si), % 0 to 1.0
0 to 1.0
Sulfur (S), % 0 to 0.010
0 to 0.030