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EN 1.4318 Stainless Steel vs. ASTM A302 Alloy Steel

Both EN 1.4318 stainless steel and ASTM A302 alloy steel are iron alloys. There are 31 material properties with values for both materials. Properties with values for just one material (3, in this case) are not shown.

For each property being compared, the top bar is EN 1.4318 stainless steel and the bottom bar is ASTM A302 alloy steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 230
180 to 190
Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 44
20 to 23
Fatigue Strength, MPa 340
250 to 280
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 77
73
Shear Strength, MPa 520
370 to 390
Tensile Strength: Ultimate (UTS), MPa 740
590 to 620
Tensile Strength: Yield (Proof), MPa 380
350 to 390

Thermal Properties

Latent Heat of Fusion, J/g 290
250
Maximum Temperature: Mechanical, °C 910
410
Melting Completion (Liquidus), °C 1430
1460
Melting Onset (Solidus), °C 1380
1420
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 15
39 to 51
Thermal Expansion, µm/m-K 16
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.4
7.2 to 7.4
Electrical Conductivity: Equal Weight (Specific), % IACS 2.7
8.2 to 8.4

Otherwise Unclassified Properties

Base Metal Price, % relative 13
2.4 to 3.0
Density, g/cm3 7.8
7.8 to 7.9
Embodied Carbon, kg CO2/kg material 2.8
1.5 to 1.6
Embodied Energy, MJ/kg 39
20 to 21
Embodied Water, L/kg 130
48 to 50

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 280
110 to 120
Resilience: Unit (Modulus of Resilience), kJ/m3 360
330 to 410
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 27
21 to 22
Strength to Weight: Bending, points 23
20 to 21
Thermal Diffusivity, mm2/s 4.0
10 to 14
Thermal Shock Resistance, points 17
17 to 18