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ASTM A387 Grade 9 Steel vs. EN 1.4640 Stainless Steel

Both ASTM A387 grade 9 steel and EN 1.4640 stainless steel are iron alloys. They have 80% of their average alloy composition in common. There are 32 material properties with values for both materials. Properties with values for just one material (1, 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 EN 1.4640 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 150 to 180
190 to 200
Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 20 to 21
51
Fatigue Strength, MPa 160 to 240
230 to 250
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 75
77
Shear Strength, MPa 310 to 380
440 to 460
Tensile Strength: Ultimate (UTS), MPa 500 to 600
620 to 650
Tensile Strength: Yield (Proof), MPa 230 to 350
240 to 260

Thermal Properties

Latent Heat of Fusion, J/g 270
280
Maximum Temperature: Mechanical, °C 600
930
Melting Completion (Liquidus), °C 1460
1420
Melting Onset (Solidus), °C 1410
1380
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 26
15
Thermal Expansion, µm/m-K 13
16

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 9.0
2.4
Electrical Conductivity: Equal Weight (Specific), % IACS 10
2.7

Otherwise Unclassified Properties

Base Metal Price, % relative 6.5
14
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 2.1
2.8
Embodied Energy, MJ/kg 28
40
Embodied Water, L/kg 87
150

Common Calculations

PREN (Pitting Resistance) 12
20
Resilience: Ultimate (Unit Rupture Work), MJ/m3 83 to 110
250 to 260
Resilience: Unit (Modulus of Resilience), kJ/m3 140 to 310
150 to 170
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 18 to 21
22 to 23
Strength to Weight: Bending, points 18 to 20
21
Thermal Diffusivity, mm2/s 6.9
4.0
Thermal Shock Resistance, points 14 to 17
14 to 15

Alloy Composition

Carbon (C), % 0 to 0.15
0.030 to 0.080
Chromium (Cr), % 8.0 to 10
18 to 19
Copper (Cu), % 0
1.3 to 2.0
Iron (Fe), % 87.1 to 90.8
67.4 to 73.6
Manganese (Mn), % 0.3 to 0.6
1.5 to 4.0
Molybdenum (Mo), % 0.9 to 1.1
0
Nickel (Ni), % 0
5.5 to 6.9
Nitrogen (N), % 0
0.030 to 0.11
Phosphorus (P), % 0 to 0.025
0 to 0.045
Silicon (Si), % 0 to 1.0
0 to 0.5
Sulfur (S), % 0 to 0.025
0 to 0.015
Vanadium (V), % 0 to 0.040
0