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S32101 Stainless Steel vs. AISI 439 Stainless Steel

Both S32101 stainless steel and AISI 439 stainless steel are iron alloys. Both are furnished in the annealed condition. They have 90% of their average alloy composition in common. There are 33 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 S32101 stainless steel and the bottom bar is AISI 439 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 260
160
Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 34
23
Fatigue Strength, MPa 400
170
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 78
77
Shear Strength, MPa 490
310
Tensile Strength: Ultimate (UTS), MPa 740
490
Tensile Strength: Yield (Proof), MPa 500
250

Thermal Properties

Latent Heat of Fusion, J/g 290
280
Maximum Temperature: Corrosion, °C 430
530
Maximum Temperature: Mechanical, °C 1000
890
Melting Completion (Liquidus), °C 1420
1510
Melting Onset (Solidus), °C 1370
1430
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 15
25
Thermal Expansion, µm/m-K 13
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.2
2.9
Electrical Conductivity: Equal Weight (Specific), % IACS 2.5
3.4

Otherwise Unclassified Properties

Base Metal Price, % relative 12
9.0
Density, g/cm3 7.7
7.7
Embodied Carbon, kg CO2/kg material 2.6
2.3
Embodied Energy, MJ/kg 38
34
Embodied Water, L/kg 150
120

Common Calculations

PREN (Pitting Resistance) 27
18
Resilience: Ultimate (Unit Rupture Work), MJ/m3 230
95
Resilience: Unit (Modulus of Resilience), kJ/m3 640
160
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 27
18
Strength to Weight: Bending, points 24
18
Thermal Diffusivity, mm2/s 4.0
6.7
Thermal Shock Resistance, points 20
16

Alloy Composition

Aluminum (Al), % 0
0 to 0.15
Carbon (C), % 0 to 0.040
0 to 0.030
Chromium (Cr), % 21 to 22
17 to 19
Copper (Cu), % 0.1 to 0.8
0
Iron (Fe), % 67.3 to 73.3
77.1 to 82.8
Manganese (Mn), % 4.0 to 6.0
0 to 1.0
Molybdenum (Mo), % 0.1 to 0.8
0
Nickel (Ni), % 1.4 to 1.7
0 to 0.5
Nitrogen (N), % 0.2 to 0.25
0 to 0.030
Phosphorus (P), % 0 to 0.040
0 to 0.040
Silicon (Si), % 0 to 1.0
0 to 1.0
Sulfur (S), % 0 to 0.030
0 to 0.030
Titanium (Ti), % 0
0.2 to 1.1