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AISI 347LN Stainless Steel vs. ASTM A387 Grade 21L Class 1

Both AISI 347LN stainless steel and ASTM A387 grade 21L class 1 are iron alloys. Both are furnished in the annealed condition. They have 73% of their average alloy composition in common. There are 32 material properties with values for both materials. Properties with values for just one material (3, in this case) are not shown.

For each property being compared, the top bar is AISI 347LN stainless steel and the bottom bar is ASTM A387 grade 21L class 1.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 180
150
Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 40
21
Fatigue Strength, MPa 200
160
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 77
74
Shear Strength, MPa 400
310
Tensile Strength: Ultimate (UTS), MPa 590
500
Tensile Strength: Yield (Proof), MPa 230
230

Thermal Properties

Latent Heat of Fusion, J/g 290
260
Maximum Temperature: Mechanical, °C 940
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 18
4.1
Density, g/cm3 7.8
7.9
Embodied Carbon, kg CO2/kg material 3.5
1.8
Embodied Energy, MJ/kg 49
23
Embodied Water, L/kg 150
62

Common Calculations

PREN (Pitting Resistance) 19
6.4
Resilience: Ultimate (Unit Rupture Work), MJ/m3 190
84
Resilience: Unit (Modulus of Resilience), kJ/m3 130
140
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 21
18
Strength to Weight: Bending, points 20
18
Thermal Diffusivity, mm2/s 4.1
11
Thermal Shock Resistance, points 13
14

Alloy Composition

Carbon (C), % 0.0050 to 0.020
0 to 0.1
Chromium (Cr), % 17 to 19
2.8 to 3.3
Iron (Fe), % 64.3 to 73.7
94.4 to 96.1
Manganese (Mn), % 0 to 2.0
0.3 to 0.6
Molybdenum (Mo), % 0
0.9 to 1.1
Nickel (Ni), % 9.0 to 13
0
Niobium (Nb), % 0.2 to 0.5
0
Nitrogen (N), % 0.060 to 0.1
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