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ASTM A387 Grade 9 Steel vs. EN 1.4423 Stainless Steel

Both ASTM A387 grade 9 steel and EN 1.4423 stainless steel are iron alloys. They have 88% 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 A387 grade 9 steel and the bottom bar is EN 1.4423 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 20 to 21
17
Fatigue Strength, MPa 160 to 240
380
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 75
77
Shear Strength, MPa 310 to 380
520
Tensile Strength: Ultimate (UTS), MPa 500 to 600
850
Tensile Strength: Yield (Proof), MPa 230 to 350
630

Thermal Properties

Latent Heat of Fusion, J/g 270
280
Maximum Temperature: Mechanical, °C 600
780
Melting Completion (Liquidus), °C 1460
1460
Melting Onset (Solidus), °C 1410
1420
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 26
16
Thermal Expansion, µm/m-K 13
9.9

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 9.0
2.3
Electrical Conductivity: Equal Weight (Specific), % IACS 10
2.6

Otherwise Unclassified Properties

Base Metal Price, % relative 6.5
14
Density, g/cm3 7.8
7.9
Embodied Carbon, kg CO2/kg material 2.1
3.2
Embodied Energy, MJ/kg 28
43
Embodied Water, L/kg 87
120

Common Calculations

PREN (Pitting Resistance) 12
21
Resilience: Ultimate (Unit Rupture Work), MJ/m3 83 to 110
130
Resilience: Unit (Modulus of Resilience), kJ/m3 140 to 310
1000
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 18 to 21
30
Strength to Weight: Bending, points 18 to 20
25
Thermal Diffusivity, mm2/s 6.9
4.3
Thermal Shock Resistance, points 14 to 17
31

Alloy Composition

Carbon (C), % 0 to 0.15
0 to 0.020
Chromium (Cr), % 8.0 to 10
11 to 13
Copper (Cu), % 0
0.2 to 0.8
Iron (Fe), % 87.1 to 90.8
73.8 to 80.5
Manganese (Mn), % 0.3 to 0.6
0 to 2.0
Molybdenum (Mo), % 0.9 to 1.1
2.3 to 2.8
Nickel (Ni), % 0
6.0 to 7.0
Nitrogen (N), % 0
0 to 0.020
Phosphorus (P), % 0 to 0.025
0 to 0.040
Silicon (Si), % 0 to 1.0
0 to 0.5
Sulfur (S), % 0 to 0.025
0 to 0.0030
Vanadium (V), % 0 to 0.040
0