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ASTM A387 Grade 21L Class 1 vs. AISI 301LN Stainless Steel

Both ASTM A387 grade 21L class 1 and AISI 301LN stainless steel are iron alloys. They have 78% of their average alloy composition in common. There are 32 material properties with values for both materials. Properties with values for just one material (1, 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 301LN stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 150
210 to 320
Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 21
23 to 51
Fatigue Strength, MPa 160
270 to 520
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 74
77
Shear Strength, MPa 310
450 to 670
Tensile Strength: Ultimate (UTS), MPa 500
630 to 1060
Tensile Strength: Yield (Proof), MPa 230
270 to 770

Thermal Properties

Latent Heat of Fusion, J/g 260
280
Maximum Temperature: Mechanical, °C 480
890
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
15
Thermal Expansion, µm/m-K 13
16

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.6
2.4
Electrical Conductivity: Equal Weight (Specific), % IACS 8.8
2.7

Otherwise Unclassified Properties

Base Metal Price, % relative 4.1
13
Density, g/cm3 7.9
7.8
Embodied Carbon, kg CO2/kg material 1.8
2.7
Embodied Energy, MJ/kg 23
39
Embodied Water, L/kg 62
130

Common Calculations

PREN (Pitting Resistance) 6.4
19
Resilience: Ultimate (Unit Rupture Work), MJ/m3 84
220 to 290
Resilience: Unit (Modulus of Resilience), kJ/m3 140
180 to 1520
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 18
22 to 38
Strength to Weight: Bending, points 18
21 to 30
Thermal Diffusivity, mm2/s 11
4.0
Thermal Shock Resistance, points 14
14 to 24

Alloy Composition

Carbon (C), % 0 to 0.1
0 to 0.030
Chromium (Cr), % 2.8 to 3.3
16 to 18
Iron (Fe), % 94.4 to 96.1
70.7 to 77.9
Manganese (Mn), % 0.3 to 0.6
0 to 2.0
Molybdenum (Mo), % 0.9 to 1.1
0
Nickel (Ni), % 0
6.0 to 8.0
Nitrogen (N), % 0
0.070 to 0.2
Phosphorus (P), % 0 to 0.025
0 to 0.045
Silicon (Si), % 0 to 0.5
0 to 1.0
Sulfur (S), % 0 to 0.025
0 to 0.030