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ASTM A387 Grade 21 Steel vs. N08332 Stainless Steel

Both ASTM A387 grade 21 steel and N08332 stainless steel are iron alloys. They have 47% 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 21 steel and the bottom bar is N08332 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 150 to 180
170
Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 21
34
Fatigue Strength, MPa 160 to 250
170
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 74
76
Shear Strength, MPa 310 to 370
350
Tensile Strength: Ultimate (UTS), MPa 500 to 590
520
Tensile Strength: Yield (Proof), MPa 230 to 350
210

Thermal Properties

Latent Heat of Fusion, J/g 260
310
Maximum Temperature: Mechanical, °C 480
1050
Melting Completion (Liquidus), °C 1470
1390
Melting Onset (Solidus), °C 1430
1340
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
1.9

Otherwise Unclassified Properties

Base Metal Price, % relative 4.1
32
Density, g/cm3 7.9
8.0
Embodied Carbon, kg CO2/kg material 1.8
5.4
Embodied Energy, MJ/kg 23
77
Embodied Water, L/kg 62
190

Common Calculations

PREN (Pitting Resistance) 6.4
19
Resilience: Ultimate (Unit Rupture Work), MJ/m3 84 to 110
140
Resilience: Unit (Modulus of Resilience), kJ/m3 140 to 320
110
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 18 to 21
18
Strength to Weight: Bending, points 18 to 20
18
Thermal Diffusivity, mm2/s 11
3.1
Thermal Shock Resistance, points 14 to 17
12

Alloy Composition

Carbon (C), % 0.050 to 0.15
0.050 to 0.1
Chromium (Cr), % 2.8 to 3.3
17 to 20
Copper (Cu), % 0
0 to 1.0
Iron (Fe), % 94.4 to 96
38.3 to 48.2
Lead (Pb), % 0
0 to 0.0050
Manganese (Mn), % 0.3 to 0.6
0 to 2.0
Molybdenum (Mo), % 0.9 to 1.1
0
Nickel (Ni), % 0
34 to 37
Phosphorus (P), % 0 to 0.025
0 to 0.030
Silicon (Si), % 0 to 0.5
0.75 to 1.5
Sulfur (S), % 0 to 0.025
0 to 0.030
Tin (Sn), % 0
0 to 0.025