MakeItFrom.com
Menu (ESC)

ASTM A387 Grade 21 Steel vs. SAE-AISI 1146 Steel

Both ASTM A387 grade 21 steel and SAE-AISI 1146 steel are iron alloys. They have a very high 96% 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 21 steel and the bottom bar is SAE-AISI 1146 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 150 to 180
190 to 200
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 21
13 to 17
Fatigue Strength, MPa 160 to 250
240 to 400
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 74
72
Shear Strength, MPa 310 to 370
410 to 440
Tensile Strength: Ultimate (UTS), MPa 500 to 590
670 to 730
Tensile Strength: Yield (Proof), MPa 230 to 350
360 to 630

Thermal Properties

Latent Heat of Fusion, J/g 260
250
Maximum Temperature: Mechanical, °C 480
400
Melting Completion (Liquidus), °C 1470
1460
Melting Onset (Solidus), °C 1430
1420
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 41
51
Thermal Expansion, µm/m-K 13
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.6
7.1
Electrical Conductivity: Equal Weight (Specific), % IACS 8.8
8.1

Otherwise Unclassified Properties

Base Metal Price, % relative 4.1
1.8
Density, g/cm3 7.9
7.8
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 to 110
93 to 97
Resilience: Unit (Modulus of Resilience), kJ/m3 140 to 320
340 to 1050
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 18 to 21
24 to 26
Strength to Weight: Bending, points 18 to 20
22 to 23
Thermal Diffusivity, mm2/s 11
14
Thermal Shock Resistance, points 14 to 17
20 to 22

Alloy Composition

Carbon (C), % 0.050 to 0.15
0.42 to 0.49
Chromium (Cr), % 2.8 to 3.3
0
Iron (Fe), % 94.4 to 96
98.3 to 98.8
Manganese (Mn), % 0.3 to 0.6
0.7 to 1.0
Molybdenum (Mo), % 0.9 to 1.1
0
Phosphorus (P), % 0 to 0.025
0 to 0.040
Silicon (Si), % 0 to 0.5
0
Sulfur (S), % 0 to 0.025
0.080 to 0.13