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ASTM A387 Grade 21L Class 1 vs. ASTM A285 Carbon Steel

Both ASTM A387 grade 21L class 1 and ASTM A285 carbon steel are iron alloys. There are 31 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 ASTM A285 carbon steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 150
110 to 130
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 21
30 to 34
Fatigue Strength, MPa 160
150 to 180
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 74
73
Shear Strength, MPa 310
250 to 290
Tensile Strength: Ultimate (UTS), MPa 500
380 to 450
Tensile Strength: Yield (Proof), MPa 230
190 to 230

Thermal Properties

Latent Heat of Fusion, J/g 260
250
Maximum Temperature: Mechanical, °C 480
400
Melting Completion (Liquidus), °C 1470
1470
Melting Onset (Solidus), °C 1430
1420 to 1430
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 41
53
Thermal Expansion, µm/m-K 13
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.6
7.0
Electrical Conductivity: Equal Weight (Specific), % IACS 8.8
8.0

Otherwise Unclassified Properties

Base Metal Price, % relative 4.1
1.8
Density, g/cm3 7.9
7.9
Embodied Carbon, kg CO2/kg material 1.8
1.4
Embodied Energy, MJ/kg 23
18
Embodied Water, L/kg 62
46

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 84
110
Resilience: Unit (Modulus of Resilience), kJ/m3 140
94 to 150
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 18
13 to 16
Strength to Weight: Bending, points 18
15 to 17
Thermal Diffusivity, mm2/s 11
14
Thermal Shock Resistance, points 14
12 to 14