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S32750 Stainless Steel vs. AISI 321H Stainless Steel

Both S32750 stainless steel and AISI 321H stainless steel are iron alloys. Both are furnished in the annealed condition. They have 88% of their average alloy composition in common. There are 33 material properties with values for both materials. Properties with values for just one material (3, in this case) are not shown.

For each property being compared, the top bar is S32750 stainless steel and the bottom bar is AISI 321H stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 270
190
Elastic (Young's, Tensile) Modulus, GPa 210
200
Elongation at Break, % 17
40
Fatigue Strength, MPa 360
200
Poisson's Ratio 0.27
0.28
Shear Modulus, GPa 81
77
Shear Strength, MPa 530
400
Tensile Strength: Ultimate (UTS), MPa 860
580
Tensile Strength: Yield (Proof), MPa 590
230

Thermal Properties

Latent Heat of Fusion, J/g 300
290
Maximum Temperature: Corrosion, °C 450
480
Maximum Temperature: Mechanical, °C 1100
940
Melting Completion (Liquidus), °C 1450
1430
Melting Onset (Solidus), °C 1400
1380
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 15
15
Thermal Expansion, µm/m-K 12
17

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.2
2.4
Electrical Conductivity: Equal Weight (Specific), % IACS 2.5
2.7

Otherwise Unclassified Properties

Base Metal Price, % relative 21
16
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 4.1
3.2
Embodied Energy, MJ/kg 56
46
Embodied Water, L/kg 180
140

Common Calculations

PREN (Pitting Resistance) 43
18
Resilience: Ultimate (Unit Rupture Work), MJ/m3 130
190
Resilience: Unit (Modulus of Resilience), kJ/m3 860
140
Stiffness to Weight: Axial, points 15
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 31
21
Strength to Weight: Bending, points 26
20
Thermal Diffusivity, mm2/s 4.0
4.0
Thermal Shock Resistance, points 25
12

Alloy Composition

Carbon (C), % 0 to 0.030
0.040 to 0.1
Chromium (Cr), % 24 to 26
17 to 19
Copper (Cu), % 0 to 0.5
0
Iron (Fe), % 58.1 to 66.8
65.4 to 74
Manganese (Mn), % 0 to 1.2
0 to 2.0
Molybdenum (Mo), % 3.0 to 5.0
0
Nickel (Ni), % 6.0 to 8.0
9.0 to 12
Nitrogen (N), % 0.24 to 0.32
0
Phosphorus (P), % 0 to 0.035
0 to 0.045
Silicon (Si), % 0 to 0.8
0 to 0.75
Sulfur (S), % 0 to 0.020
0 to 0.030
Titanium (Ti), % 0
0 to 0.7