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ASTM A387 Grade 21L Class 1 vs. S32906 Stainless Steel

Both ASTM A387 grade 21L class 1 and S32906 stainless steel are iron alloys. Both are furnished in the annealed condition. They have 65% 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 S32906 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 150
270
Elastic (Young's, Tensile) Modulus, GPa 190
210
Elongation at Break, % 21
28
Fatigue Strength, MPa 160
460
Poisson's Ratio 0.29
0.27
Shear Modulus, GPa 74
81
Shear Strength, MPa 310
550
Tensile Strength: Ultimate (UTS), MPa 500
850
Tensile Strength: Yield (Proof), MPa 230
620

Thermal Properties

Latent Heat of Fusion, J/g 260
300
Maximum Temperature: Mechanical, °C 480
1100
Melting Completion (Liquidus), °C 1470
1430
Melting Onset (Solidus), °C 1430
1380
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 41
13
Thermal Expansion, µm/m-K 13
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.6
2.2
Electrical Conductivity: Equal Weight (Specific), % IACS 8.8
2.5

Otherwise Unclassified Properties

Base Metal Price, % relative 4.1
20
Density, g/cm3 7.9
7.7
Embodied Carbon, kg CO2/kg material 1.8
3.7
Embodied Energy, MJ/kg 23
52
Embodied Water, L/kg 62
190

Common Calculations

PREN (Pitting Resistance) 6.4
41
Resilience: Ultimate (Unit Rupture Work), MJ/m3 84
220
Resilience: Unit (Modulus of Resilience), kJ/m3 140
950
Stiffness to Weight: Axial, points 13
15
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 18
30
Strength to Weight: Bending, points 18
26
Thermal Diffusivity, mm2/s 11
3.6
Thermal Shock Resistance, points 14
23

Alloy Composition

Carbon (C), % 0 to 0.1
0 to 0.030
Chromium (Cr), % 2.8 to 3.3
28 to 30
Copper (Cu), % 0
0 to 0.8
Iron (Fe), % 94.4 to 96.1
56.6 to 63.6
Manganese (Mn), % 0.3 to 0.6
0.8 to 1.5
Molybdenum (Mo), % 0.9 to 1.1
1.5 to 2.6
Nickel (Ni), % 0
5.8 to 7.5
Nitrogen (N), % 0
0.3 to 0.4
Phosphorus (P), % 0 to 0.025
0 to 0.030
Silicon (Si), % 0 to 0.5
0 to 0.5
Sulfur (S), % 0 to 0.025
0 to 0.030