MakeItFrom.com
Menu (ESC)

ASTM A302 Alloy Steel vs. ASTM A242 HSLA Steel

Both ASTM A302 alloy steel and ASTM A242 HSLA steel are iron alloys.

For each property being compared, the top bar is ASTM A302 alloy steel and the bottom bar is ASTM A242 HSLA steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 180 to 190
150
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 20 to 23
22
Fatigue Strength, MPa 250 to 280
230
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 73
73
Shear Strength, MPa 370 to 390
310
Tensile Strength: Ultimate (UTS), MPa 590 to 620
490
Tensile Strength: Yield (Proof), MPa 350 to 390
330

Thermal Properties

Latent Heat of Fusion, J/g 250
250
Maximum Temperature: Mechanical, °C 410
400
Melting Completion (Liquidus), °C 1460
1460
Melting Onset (Solidus), °C 1420
1420
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 39 to 51
52
Thermal Expansion, µm/m-K 13
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.2 to 7.4
7.1
Electrical Conductivity: Equal Weight (Specific), % IACS 8.2 to 8.4
8.1

Otherwise Unclassified Properties

Base Metal Price, % relative 2.4 to 3.0
1.9
Density, g/cm3 7.8 to 7.9
7.9
Embodied Carbon, kg CO2/kg material 1.5 to 1.6
1.4
Embodied Energy, MJ/kg 20 to 21
18
Embodied Water, L/kg 48 to 50
46

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 110 to 120
95
Resilience: Unit (Modulus of Resilience), kJ/m3 330 to 410
290
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 21 to 22
17
Strength to Weight: Bending, points 20 to 21
17
Thermal Diffusivity, mm2/s 10 to 14
14
Thermal Shock Resistance, points 17 to 18
14