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ASTM A387 Grade 21L Class 1 vs. S35315 Stainless Steel

Both ASTM A387 grade 21L class 1 and S35315 stainless steel are iron alloys. Both are furnished in the annealed condition. They have 41% 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 S35315 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 150
190
Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 21
46
Fatigue Strength, MPa 160
280
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 74
78
Shear Strength, MPa 310
520
Tensile Strength: Ultimate (UTS), MPa 500
740
Tensile Strength: Yield (Proof), MPa 230
300

Thermal Properties

Latent Heat of Fusion, J/g 260
330
Maximum Temperature: Mechanical, °C 480
1100
Melting Completion (Liquidus), °C 1470
1370
Melting Onset (Solidus), °C 1430
1330
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
34
Density, g/cm3 7.9
7.9
Embodied Carbon, kg CO2/kg material 1.8
5.7
Embodied Energy, MJ/kg 23
81
Embodied Water, L/kg 62
220

Common Calculations

PREN (Pitting Resistance) 6.4
27
Resilience: Ultimate (Unit Rupture Work), MJ/m3 84
270
Resilience: Unit (Modulus of Resilience), kJ/m3 140
230
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 18
26
Strength to Weight: Bending, points 18
23
Thermal Diffusivity, mm2/s 11
3.1
Thermal Shock Resistance, points 14
17

Alloy Composition

Carbon (C), % 0 to 0.1
0.040 to 0.080
Cerium (Ce), % 0
0.030 to 0.1
Chromium (Cr), % 2.8 to 3.3
24 to 26
Iron (Fe), % 94.4 to 96.1
33.6 to 40.6
Manganese (Mn), % 0.3 to 0.6
0 to 2.0
Molybdenum (Mo), % 0.9 to 1.1
0
Nickel (Ni), % 0
34 to 36
Nitrogen (N), % 0
0.12 to 0.18
Phosphorus (P), % 0 to 0.025
0 to 0.040
Silicon (Si), % 0 to 0.5
1.2 to 2.0
Sulfur (S), % 0 to 0.025
0 to 0.030