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ASTM A387 Grade 21L Class 1 vs. ASTM A202 Steel

Both ASTM A387 grade 21L class 1 and ASTM A202 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 A202 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 150
180 to 200
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 21
17 to 18
Fatigue Strength, MPa 160
240
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 74
73
Shear Strength, MPa 310
360 to 410
Tensile Strength: Ultimate (UTS), MPa 500
590 to 670
Tensile Strength: Yield (Proof), MPa 230
350 to 360

Thermal Properties

Latent Heat of Fusion, J/g 260
260
Maximum Temperature: Mechanical, °C 480
410
Melting Completion (Liquidus), °C 1470
1450
Melting Onset (Solidus), °C 1430
1410
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 41
52
Thermal Expansion, µm/m-K 13
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.6
7.3
Electrical Conductivity: Equal Weight (Specific), % IACS 8.8
8.4

Otherwise Unclassified Properties

Base Metal Price, % relative 4.1
2.1
Density, g/cm3 7.9
7.8
Embodied Carbon, kg CO2/kg material 1.8
1.4
Embodied Energy, MJ/kg 23
19
Embodied Water, L/kg 62
49

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 84
93 to 96
Resilience: Unit (Modulus of Resilience), kJ/m3 140
330 to 350
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 18
21 to 24
Strength to Weight: Bending, points 18
20 to 22
Thermal Diffusivity, mm2/s 11
14
Thermal Shock Resistance, points 14
17 to 20