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ASTM A387 Grade 9 Steel vs. SAE-AISI 1049 Steel

Both ASTM A387 grade 9 steel and SAE-AISI 1049 steel are iron alloys. They have 90% of their average alloy composition in common. 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 SAE-AISI 1049 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 150 to 180
200 to 220
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 20 to 21
11 to 17
Fatigue Strength, MPa 160 to 240
250 to 400
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 75
72
Shear Strength, MPa 310 to 380
420 to 450
Tensile Strength: Ultimate (UTS), MPa 500 to 600
680 to 750
Tensile Strength: Yield (Proof), MPa 230 to 350
370 to 640

Thermal Properties

Latent Heat of Fusion, J/g 270
250
Maximum Temperature: Mechanical, °C 600
400
Melting Completion (Liquidus), °C 1460
1460
Melting Onset (Solidus), °C 1410
1420
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 26
51
Thermal Expansion, µm/m-K 13
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 9.0
7.0
Electrical Conductivity: Equal Weight (Specific), % IACS 10
8.1

Otherwise Unclassified Properties

Base Metal Price, % relative 6.5
1.8
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 2.1
1.4
Embodied Energy, MJ/kg 28
18
Embodied Water, L/kg 87
46

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 83 to 110
75 to 99
Resilience: Unit (Modulus of Resilience), kJ/m3 140 to 310
370 to 1090
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 18 to 21
24 to 27
Strength to Weight: Bending, points 18 to 20
22 to 23
Thermal Diffusivity, mm2/s 6.9
14
Thermal Shock Resistance, points 14 to 17
22 to 24

Alloy Composition

Carbon (C), % 0 to 0.15
0.46 to 0.53
Chromium (Cr), % 8.0 to 10
0
Iron (Fe), % 87.1 to 90.8
98.5 to 98.9
Manganese (Mn), % 0.3 to 0.6
0.6 to 0.9
Molybdenum (Mo), % 0.9 to 1.1
0
Phosphorus (P), % 0 to 0.025
0 to 0.040
Silicon (Si), % 0 to 1.0
0
Sulfur (S), % 0 to 0.025
0 to 0.050
Vanadium (V), % 0 to 0.040
0