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ASTM A356 Grade 8 vs. EN 1.4371 Stainless Steel

Both ASTM A356 grade 8 and EN 1.4371 stainless steel are iron alloys. They have 73% of their average alloy composition in common. 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 ASTM A356 grade 8 and the bottom bar is EN 1.4371 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 190
220 to 230
Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 21
45 to 51
Fatigue Strength, MPa 270
290 to 340
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 73
77
Tensile Strength: Ultimate (UTS), MPa 630
740 to 750
Tensile Strength: Yield (Proof), MPa 390
320 to 340

Thermal Properties

Latent Heat of Fusion, J/g 260
280
Maximum Temperature: Mechanical, °C 440
880
Melting Completion (Liquidus), °C 1470
1410
Melting Onset (Solidus), °C 1430
1370
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 38
15
Thermal Expansion, µm/m-K 13
17

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.5
2.5
Electrical Conductivity: Equal Weight (Specific), % IACS 8.6
2.9

Otherwise Unclassified Properties

Base Metal Price, % relative 3.5
12
Density, g/cm3 7.8
7.7
Embodied Carbon, kg CO2/kg material 2.0
2.6
Embodied Energy, MJ/kg 26
38
Embodied Water, L/kg 55
140

Common Calculations

PREN (Pitting Resistance) 4.7
20
Resilience: Ultimate (Unit Rupture Work), MJ/m3 110
270 to 310
Resilience: Unit (Modulus of Resilience), kJ/m3 390
250 to 300
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 22
27
Strength to Weight: Bending, points 21
24
Thermal Diffusivity, mm2/s 10
4.0
Thermal Shock Resistance, points 18
16

Alloy Composition

Carbon (C), % 0 to 0.2
0 to 0.030
Chromium (Cr), % 1.0 to 1.5
16 to 17.5
Copper (Cu), % 0
0 to 1.0
Iron (Fe), % 95.4 to 97.4
66.7 to 74.4
Manganese (Mn), % 0.5 to 0.9
6.0 to 8.0
Molybdenum (Mo), % 0.9 to 1.2
0
Nickel (Ni), % 0
3.5 to 5.5
Nitrogen (N), % 0
0.15 to 0.25
Phosphorus (P), % 0 to 0.035
0 to 0.045
Silicon (Si), % 0.2 to 0.6
0 to 1.0
Sulfur (S), % 0 to 0.030
0 to 0.015
Vanadium (V), % 0.050 to 0.15
0