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AWS E383 vs. ASTM A387 Grade 21L Class 1

Both AWS E383 and ASTM A387 grade 21L class 1 are iron alloys. They have a modest 39% of their average alloy composition in common, which, by itself, doesn't mean much. There are 23 material properties with values for both materials. Properties with values for just one material (9, in this case) are not shown.

For each property being compared, the top bar is AWS E383 and the bottom bar is ASTM A387 grade 21L class 1.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 210
190
Elongation at Break, % 34
21
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 80
74
Tensile Strength: Ultimate (UTS), MPa 580
500

Thermal Properties

Latent Heat of Fusion, J/g 320
260
Melting Completion (Liquidus), °C 1420
1470
Melting Onset (Solidus), °C 1370
1430
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 12
41
Thermal Expansion, µm/m-K 14
13

Otherwise Unclassified Properties

Base Metal Price, % relative 37
4.1
Density, g/cm3 8.1
7.9
Embodied Carbon, kg CO2/kg material 6.4
1.8
Embodied Energy, MJ/kg 89
23
Embodied Water, L/kg 240
62

Common Calculations

PREN (Pitting Resistance) 40
6.4
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 20
18
Strength to Weight: Bending, points 19
18
Thermal Diffusivity, mm2/s 3.1
11
Thermal Shock Resistance, points 15
14

Alloy Composition

Carbon (C), % 0 to 0.030
0 to 0.1
Chromium (Cr), % 26.5 to 29
2.8 to 3.3
Copper (Cu), % 0.6 to 1.5
0
Iron (Fe), % 28.8 to 39.2
94.4 to 96.1
Manganese (Mn), % 0.5 to 2.5
0.3 to 0.6
Molybdenum (Mo), % 3.2 to 4.2
0.9 to 1.1
Nickel (Ni), % 30 to 33
0
Phosphorus (P), % 0 to 0.020
0 to 0.025
Silicon (Si), % 0 to 0.9
0 to 0.5
Sulfur (S), % 0 to 0.020
0 to 0.025