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ASTM A588 Steel vs. ASTM A387 Grade 21 Steel

Both ASTM A588 steel and ASTM A387 grade 21 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 A588 steel and the bottom bar is ASTM A387 grade 21 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 170
150 to 180
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 22
21
Fatigue Strength, MPa 270
160 to 250
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 73
74
Shear Strength, MPa 350
310 to 370
Tensile Strength: Ultimate (UTS), MPa 550
500 to 590
Tensile Strength: Yield (Proof), MPa 390
230 to 350

Thermal Properties

Latent Heat of Fusion, J/g 250 to 260
260
Maximum Temperature: Mechanical, °C 410
480
Melting Completion (Liquidus), °C 1460
1470
Melting Onset (Solidus), °C 1410 to 1420
1430
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 43 to 44
41
Thermal Expansion, µm/m-K 13
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.4
7.6
Electrical Conductivity: Equal Weight (Specific), % IACS 8.5
8.8

Otherwise Unclassified Properties

Base Metal Price, % relative 2.3 to 2.5
4.1
Density, g/cm3 7.8
7.9
Embodied Carbon, kg CO2/kg material 1.5 to 1.6
1.8
Embodied Energy, MJ/kg 20 to 22
23
Embodied Water, L/kg 50 to 51
62

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 110
84 to 110
Resilience: Unit (Modulus of Resilience), kJ/m3 400
140 to 320
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 20
18 to 21
Strength to Weight: Bending, points 19
18 to 20
Thermal Diffusivity, mm2/s 12
11
Thermal Shock Resistance, points 16
14 to 17