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ASTM A387 Grade 9 Steel vs. ASTM A209 Steel

Both ASTM A387 grade 9 steel and ASTM A209 steel are iron alloys. There are 31 material properties with values for both materials. Properties with values for just one material (2, in this case) are not shown.

For each property being compared, the top bar is ASTM A387 grade 9 steel and the bottom bar is ASTM A209 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 150 to 180
140 to 150
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 20 to 21
34
Fatigue Strength, MPa 160 to 240
180 to 200
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 75
73
Shear Strength, MPa 310 to 380
280 to 310
Tensile Strength: Ultimate (UTS), MPa 500 to 600
420 to 460
Tensile Strength: Yield (Proof), MPa 230 to 350
220 to 250

Thermal Properties

Latent Heat of Fusion, J/g 270
250
Maximum Temperature: Mechanical, °C 600
410
Melting Completion (Liquidus), °C 1460
1470
Melting Onset (Solidus), °C 1410
1420 to 1430
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 26
50
Thermal Expansion, µm/m-K 13
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 9.0
7.1
Electrical Conductivity: Equal Weight (Specific), % IACS 10
8.1 to 8.2

Otherwise Unclassified Properties

Base Metal Price, % relative 6.5
2.4
Density, g/cm3 7.8
7.9
Embodied Carbon, kg CO2/kg material 2.1
1.5
Embodied Energy, MJ/kg 28
20
Embodied Water, L/kg 87
47

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 83 to 110
120 to 130
Resilience: Unit (Modulus of Resilience), kJ/m3 140 to 310
130 to 170
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 18 to 21
15 to 16
Strength to Weight: Bending, points 18 to 20
16 to 17
Thermal Diffusivity, mm2/s 6.9
13
Thermal Shock Resistance, points 14 to 17
12 to 14