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ASTM A387 Grade 9 Steel vs. EN 1.4945 Stainless Steel

Both ASTM A387 grade 9 steel and EN 1.4945 stainless steel are iron alloys. They have 72% 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 1.4945 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 150 to 180
200 to 220
Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 20 to 21
19 to 34
Fatigue Strength, MPa 160 to 240
230 to 350
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 75
77
Shear Strength, MPa 310 to 380
430 to 460
Tensile Strength: Ultimate (UTS), MPa 500 to 600
640 to 740
Tensile Strength: Yield (Proof), MPa 230 to 350
290 to 550

Thermal Properties

Latent Heat of Fusion, J/g 270
290
Maximum Temperature: Mechanical, °C 600
920
Melting Completion (Liquidus), °C 1460
1490
Melting Onset (Solidus), °C 1410
1440
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 26
14
Thermal Expansion, µm/m-K 13
17

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 9.0
2.9
Electrical Conductivity: Equal Weight (Specific), % IACS 10
3.2

Otherwise Unclassified Properties

Base Metal Price, % relative 6.5
30
Density, g/cm3 7.8
8.1
Embodied Carbon, kg CO2/kg material 2.1
5.0
Embodied Energy, MJ/kg 28
73
Embodied Water, L/kg 87
150

Common Calculations

PREN (Pitting Resistance) 12
23
Resilience: Ultimate (Unit Rupture Work), MJ/m3 83 to 110
130 to 180
Resilience: Unit (Modulus of Resilience), kJ/m3 140 to 310
210 to 760
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 18 to 21
22 to 25
Strength to Weight: Bending, points 18 to 20
20 to 22
Thermal Diffusivity, mm2/s 6.9
3.7
Thermal Shock Resistance, points 14 to 17
14 to 16

Alloy Composition

Carbon (C), % 0 to 0.15
0.040 to 0.1
Chromium (Cr), % 8.0 to 10
15.5 to 17.5
Iron (Fe), % 87.1 to 90.8
57.9 to 65.7
Manganese (Mn), % 0.3 to 0.6
0 to 1.5
Molybdenum (Mo), % 0.9 to 1.1
0
Nickel (Ni), % 0
15.5 to 17.5
Niobium (Nb), % 0
0.4 to 1.2
Nitrogen (N), % 0
0.060 to 0.14
Phosphorus (P), % 0 to 0.025
0 to 0.035
Silicon (Si), % 0 to 1.0
0.3 to 0.6
Sulfur (S), % 0 to 0.025
0 to 0.015
Tungsten (W), % 0
2.5 to 3.5
Vanadium (V), % 0 to 0.040
0