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ASTM A387 Grade 91 Class 2 vs. EN 1.4874 Stainless Steel

Both ASTM A387 grade 91 class 2 and EN 1.4874 stainless steel are iron alloys. They have 42% of their average alloy composition in common. There are 29 material properties with values for both materials. Properties with values for just one material (4, in this case) are not shown.

For each property being compared, the top bar is ASTM A387 grade 91 class 2 and the bottom bar is EN 1.4874 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 200
140
Elastic (Young's, Tensile) Modulus, GPa 190
210
Elongation at Break, % 20
6.7
Fatigue Strength, MPa 330
180
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 75
80
Tensile Strength: Ultimate (UTS), MPa 670
480
Tensile Strength: Yield (Proof), MPa 470
360

Thermal Properties

Latent Heat of Fusion, J/g 270
300
Maximum Temperature: Mechanical, °C 600
1150
Melting Completion (Liquidus), °C 1460
1450
Melting Onset (Solidus), °C 1420
1400
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 7.0
70
Density, g/cm3 7.8
8.4
Embodied Carbon, kg CO2/kg material 2.6
7.6
Embodied Energy, MJ/kg 37
110
Embodied Water, L/kg 88
290

Common Calculations

PREN (Pitting Resistance) 13
34
Resilience: Ultimate (Unit Rupture Work), MJ/m3 120
29
Resilience: Unit (Modulus of Resilience), kJ/m3 580
310
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 24
16
Strength to Weight: Bending, points 22
16
Thermal Diffusivity, mm2/s 6.9
3.3
Thermal Shock Resistance, points 19
11

Alloy Composition

Aluminum (Al), % 0 to 0.020
0
Carbon (C), % 0.080 to 0.12
0.35 to 0.65
Chromium (Cr), % 8.0 to 9.5
19 to 22
Cobalt (Co), % 0
18.5 to 22
Iron (Fe), % 87.3 to 90.3
23 to 38.9
Manganese (Mn), % 0.3 to 0.6
0 to 2.0
Molybdenum (Mo), % 0.85 to 1.1
2.5 to 3.0
Nickel (Ni), % 0 to 0.4
18 to 22
Niobium (Nb), % 0.060 to 0.1
0.75 to 1.3
Nitrogen (N), % 0.030 to 0.070
0
Phosphorus (P), % 0 to 0.020
0 to 0.040
Silicon (Si), % 0.2 to 0.5
0 to 1.0
Sulfur (S), % 0 to 0.010
0 to 0.030
Titanium (Ti), % 0 to 0.010
0
Tungsten (W), % 0
2.0 to 3.0
Vanadium (V), % 0.18 to 0.25
0
Zirconium (Zr), % 0 to 0.010
0