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ASTM A387 Grade 21L Class 1 vs. AISI 430FSe Stainless Steel

Both ASTM A387 grade 21L class 1 and AISI 430FSe stainless steel are iron alloys. Both are furnished in the annealed condition. They have 86% 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 AISI 430FSe stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 150
230
Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 21
23
Fatigue Strength, MPa 160
210
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 74
77
Shear Strength, MPa 310
340
Tensile Strength: Ultimate (UTS), MPa 500
540
Tensile Strength: Yield (Proof), MPa 230
310

Thermal Properties

Latent Heat of Fusion, J/g 260
280
Maximum Temperature: Mechanical, °C 480
870
Melting Completion (Liquidus), °C 1470
1440
Melting Onset (Solidus), °C 1430
1390
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 41
25
Thermal Expansion, µm/m-K 13
10

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.6
2.9
Electrical Conductivity: Equal Weight (Specific), % IACS 8.8
3.4

Otherwise Unclassified Properties

Base Metal Price, % relative 4.1
8.5
Density, g/cm3 7.9
7.7
Embodied Carbon, kg CO2/kg material 1.8
2.1
Embodied Energy, MJ/kg 23
30
Embodied Water, L/kg 62
120

Common Calculations

PREN (Pitting Resistance) 6.4
17
Resilience: Ultimate (Unit Rupture Work), MJ/m3 84
110
Resilience: Unit (Modulus of Resilience), kJ/m3 140
250
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 18
20
Strength to Weight: Bending, points 18
19
Thermal Diffusivity, mm2/s 11
6.8
Thermal Shock Resistance, points 14
19

Alloy Composition

Carbon (C), % 0 to 0.1
0 to 0.12
Chromium (Cr), % 2.8 to 3.3
16 to 18
Iron (Fe), % 94.4 to 96.1
79.5 to 84
Manganese (Mn), % 0.3 to 0.6
0 to 1.3
Molybdenum (Mo), % 0.9 to 1.1
0
Phosphorus (P), % 0 to 0.025
0 to 0.060
Silicon (Si), % 0 to 0.5
0 to 1.0
Sulfur (S), % 0 to 0.025
0 to 0.060