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ASTM A387 Grade 9 Steel vs. EN 1.4971 Stainless Steel

Both ASTM A387 grade 9 steel and EN 1.4971 stainless steel are iron alloys. They have 42% of their average alloy composition in common. There are 30 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 1.4971 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 150 to 180
240
Elastic (Young's, Tensile) Modulus, GPa 190
210
Elongation at Break, % 20 to 21
34
Fatigue Strength, MPa 160 to 240
270
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 75
81
Shear Strength, MPa 310 to 380
530
Tensile Strength: Ultimate (UTS), MPa 500 to 600
800
Tensile Strength: Yield (Proof), MPa 230 to 350
340

Thermal Properties

Latent Heat of Fusion, J/g 270
300
Maximum Temperature: Mechanical, °C 600
1100
Melting Completion (Liquidus), °C 1460
1460
Melting Onset (Solidus), °C 1410
1410
Specific Heat Capacity, J/kg-K 470
450
Thermal Conductivity, W/m-K 26
13
Thermal Expansion, µm/m-K 13
15

Otherwise Unclassified Properties

Base Metal Price, % relative 6.5
70
Density, g/cm3 7.8
8.4
Embodied Carbon, kg CO2/kg material 2.1
7.6
Embodied Energy, MJ/kg 28
110
Embodied Water, L/kg 87
300

Common Calculations

PREN (Pitting Resistance) 12
38
Resilience: Ultimate (Unit Rupture Work), MJ/m3 83 to 110
220
Resilience: Unit (Modulus of Resilience), kJ/m3 140 to 310
280
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 18 to 21
26
Strength to Weight: Bending, points 18 to 20
23
Thermal Diffusivity, mm2/s 6.9
3.4
Thermal Shock Resistance, points 14 to 17
19

Alloy Composition

Carbon (C), % 0 to 0.15
0.080 to 0.16
Chromium (Cr), % 8.0 to 10
20 to 22.5
Cobalt (Co), % 0
18.5 to 21
Iron (Fe), % 87.1 to 90.8
24.3 to 37.1
Manganese (Mn), % 0.3 to 0.6
0 to 2.0
Molybdenum (Mo), % 0.9 to 1.1
2.5 to 3.5
Nickel (Ni), % 0
19 to 21
Niobium (Nb), % 0
0.75 to 1.3
Nitrogen (N), % 0
0.1 to 0.2
Phosphorus (P), % 0 to 0.025
0 to 0.035
Silicon (Si), % 0 to 1.0
0 to 1.0
Sulfur (S), % 0 to 0.025
0 to 0.015
Tungsten (W), % 0
2.0 to 3.0
Vanadium (V), % 0 to 0.040
0