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ASTM A387 Grade 21L Class 1 vs. N08320 Stainless Steel

Both ASTM A387 grade 21L class 1 and N08320 stainless steel are iron alloys. They have 49% of their average alloy composition in common. There are 32 material properties with values for both materials. Properties with values for just one material (2, in this case) are not shown.

For each property being compared, the top bar is ASTM A387 grade 21L class 1 and the bottom bar is N08320 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 150
190
Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 21
40
Fatigue Strength, MPa 160
190
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 74
78
Shear Strength, MPa 310
400
Tensile Strength: Ultimate (UTS), MPa 500
580
Tensile Strength: Yield (Proof), MPa 230
220

Thermal Properties

Latent Heat of Fusion, J/g 260
300
Maximum Temperature: Mechanical, °C 480
1100
Melting Completion (Liquidus), °C 1470
1400
Melting Onset (Solidus), °C 1430
1350
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 41
12
Thermal Expansion, µm/m-K 13
16

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.6
1.7
Electrical Conductivity: Equal Weight (Specific), % IACS 8.8
2.0

Otherwise Unclassified Properties

Base Metal Price, % relative 4.1
28
Density, g/cm3 7.9
8.0
Embodied Carbon, kg CO2/kg material 1.8
4.9
Embodied Energy, MJ/kg 23
69
Embodied Water, L/kg 62
200

Common Calculations

PREN (Pitting Resistance) 6.4
22
Resilience: Ultimate (Unit Rupture Work), MJ/m3 84
180
Resilience: Unit (Modulus of Resilience), kJ/m3 140
120
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 18
20
Strength to Weight: Bending, points 18
20
Thermal Diffusivity, mm2/s 11
3.3
Thermal Shock Resistance, points 14
13

Alloy Composition

Carbon (C), % 0 to 0.1
0 to 0.050
Chromium (Cr), % 2.8 to 3.3
21 to 23
Iron (Fe), % 94.4 to 96.1
40.4 to 50
Manganese (Mn), % 0.3 to 0.6
0 to 2.5
Molybdenum (Mo), % 0.9 to 1.1
0
Nickel (Ni), % 0
25 to 27
Phosphorus (P), % 0 to 0.025
0 to 0.040
Silicon (Si), % 0 to 0.5
0 to 1.0
Sulfur (S), % 0 to 0.025
0 to 0.030