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Annealed AISI 301LN vs. ASTM A387 Grade 21 Class 1

Both annealed AISI 301LN and ASTM A387 grade 21 class 1 are iron alloys. Both are furnished in the annealed condition. 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 (2, in this case) are not shown.

For each property being compared, the top bar is annealed AISI 301LN and the bottom bar is ASTM A387 grade 21 class 1.

Metric UnitsUS Customary Units

Mechanical Properties

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

Thermal Properties

Latent Heat of Fusion, J/g 280
260
Maximum Temperature: Mechanical, °C 890
480
Melting Completion (Liquidus), °C 1430
1470
Melting Onset (Solidus), °C 1380
1430
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 15
41
Thermal Expansion, µm/m-K 16
13

Electrical Properties

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

Otherwise Unclassified Properties

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

Common Calculations

PREN (Pitting Resistance) 19
6.4
Resilience: Ultimate (Unit Rupture Work), MJ/m3 260
84
Resilience: Unit (Modulus of Resilience), kJ/m3 180
140
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 22
18
Strength to Weight: Bending, points 21
18
Thermal Diffusivity, mm2/s 4.0
11
Thermal Shock Resistance, points 14
14

Alloy Composition

Carbon (C), % 0 to 0.030
0.050 to 0.15
Chromium (Cr), % 16 to 18
2.8 to 3.3
Iron (Fe), % 70.7 to 77.9
94.4 to 96
Manganese (Mn), % 0 to 2.0
0.3 to 0.6
Molybdenum (Mo), % 0
0.9 to 1.1
Nickel (Ni), % 6.0 to 8.0
0
Nitrogen (N), % 0.070 to 0.2
0
Phosphorus (P), % 0 to 0.045
0 to 0.025
Silicon (Si), % 0 to 1.0
0 to 0.5
Sulfur (S), % 0 to 0.030
0 to 0.025