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AISI 308 Stainless Steel vs. ASTM Grade HE Steel

Both AISI 308 stainless steel and ASTM grade HE steel are iron alloys. They have a moderately high 91% 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 308 stainless steel and the bottom bar is ASTM grade HE steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 160
190
Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 45
10
Fatigue Strength, MPa 210
160
Poisson's Ratio 0.28
0.27
Shear Modulus, GPa 78
79
Tensile Strength: Ultimate (UTS), MPa 590
670
Tensile Strength: Yield (Proof), MPa 230
310

Thermal Properties

Latent Heat of Fusion, J/g 290
310
Maximum Temperature: Corrosion, °C 420
450
Maximum Temperature: Mechanical, °C 990
1100
Melting Completion (Liquidus), °C 1420
1400
Melting Onset (Solidus), °C 1380
1360
Specific Heat Capacity, J/kg-K 480
490
Thermal Conductivity, W/m-K 15
14
Thermal Expansion, µm/m-K 16
17

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.4
2.1
Electrical Conductivity: Equal Weight (Specific), % IACS 2.8
2.5

Otherwise Unclassified Properties

Base Metal Price, % relative 17
19
Density, g/cm3 7.8
7.7
Embodied Carbon, kg CO2/kg material 3.2
3.5
Embodied Energy, MJ/kg 46
50
Embodied Water, L/kg 150
190

Common Calculations

PREN (Pitting Resistance) 20
29
Resilience: Ultimate (Unit Rupture Work), MJ/m3 210
56
Resilience: Unit (Modulus of Resilience), kJ/m3 140
240
Stiffness to Weight: Axial, points 14
15
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 21
24
Strength to Weight: Bending, points 20
22
Thermal Diffusivity, mm2/s 4.1
3.6
Thermal Shock Resistance, points 13
14

Alloy Composition

Carbon (C), % 0 to 0.080
0.2 to 0.5
Chromium (Cr), % 19 to 21
26 to 30
Iron (Fe), % 64.1 to 71
53.9 to 65.8
Manganese (Mn), % 0 to 2.0
0 to 2.0
Molybdenum (Mo), % 0
0 to 0.5
Nickel (Ni), % 10 to 12
8.0 to 11
Phosphorus (P), % 0 to 0.045
0 to 0.040
Silicon (Si), % 0 to 0.75
0 to 2.0
Sulfur (S), % 0 to 0.030
0 to 0.040