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AISI 321H Stainless Steel vs. SAE-AISI 1108 Steel

Both AISI 321H stainless steel and SAE-AISI 1108 steel are iron alloys. They have 71% of their average alloy composition in common. There are 32 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 AISI 321H stainless steel and the bottom bar is SAE-AISI 1108 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 190
110 to 140
Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 40
23 to 34
Fatigue Strength, MPa 200
170 to 260
Poisson's Ratio 0.28
0.29
Reduction in Area, % 51
45 to 57
Shear Modulus, GPa 77
73
Shear Strength, MPa 400
250 to 280
Tensile Strength: Ultimate (UTS), MPa 580
380 to 440
Tensile Strength: Yield (Proof), MPa 230
220 to 360

Thermal Properties

Latent Heat of Fusion, J/g 290
250
Maximum Temperature: Mechanical, °C 940
400
Melting Completion (Liquidus), °C 1430
1460
Melting Onset (Solidus), °C 1380
1420
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 15
52
Thermal Expansion, µm/m-K 17
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.4
7.0
Electrical Conductivity: Equal Weight (Specific), % IACS 2.7
8.0

Otherwise Unclassified Properties

Base Metal Price, % relative 16
1.8
Density, g/cm3 7.8
7.9
Embodied Carbon, kg CO2/kg material 3.2
1.4
Embodied Energy, MJ/kg 46
18
Embodied Water, L/kg 140
46

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 190
95 to 110
Resilience: Unit (Modulus of Resilience), kJ/m3 140
130 to 340
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 21
13 to 16
Strength to Weight: Bending, points 20
15 to 16
Thermal Diffusivity, mm2/s 4.0
14
Thermal Shock Resistance, points 12
12 to 14

Alloy Composition

Carbon (C), % 0.040 to 0.1
0.080 to 0.13
Chromium (Cr), % 17 to 19
0
Iron (Fe), % 65.4 to 74
98.9 to 99.24
Manganese (Mn), % 0 to 2.0
0.6 to 0.8
Nickel (Ni), % 9.0 to 12
0
Phosphorus (P), % 0 to 0.045
0 to 0.040
Silicon (Si), % 0 to 0.75
0
Sulfur (S), % 0 to 0.030
0.080 to 0.13
Titanium (Ti), % 0 to 0.7
0