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ASTM A387 Grade 91 Class 2 vs. EN 1.4361 Stainless Steel

Both ASTM A387 grade 91 class 2 and EN 1.4361 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 (2, 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 1.4361 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 200
200
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 20
43
Fatigue Strength, MPa 330
220
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 75
75
Shear Strength, MPa 420
440
Tensile Strength: Ultimate (UTS), MPa 670
630
Tensile Strength: Yield (Proof), MPa 470
250

Thermal Properties

Latent Heat of Fusion, J/g 270
350
Maximum Temperature: Mechanical, °C 600
940
Melting Completion (Liquidus), °C 1460
1370
Melting Onset (Solidus), °C 1420
1330
Specific Heat Capacity, J/kg-K 470
490
Thermal Conductivity, W/m-K 26
14
Thermal Expansion, µm/m-K 13
16

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 8.9
2.1
Electrical Conductivity: Equal Weight (Specific), % IACS 10
2.5

Otherwise Unclassified Properties

Base Metal Price, % relative 7.0
19
Density, g/cm3 7.8
7.6
Embodied Carbon, kg CO2/kg material 2.6
3.6
Embodied Energy, MJ/kg 37
52
Embodied Water, L/kg 88
150

Common Calculations

PREN (Pitting Resistance) 13
19
Resilience: Ultimate (Unit Rupture Work), MJ/m3 120
220
Resilience: Unit (Modulus of Resilience), kJ/m3 580
160
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 24
23
Strength to Weight: Bending, points 22
21
Thermal Diffusivity, mm2/s 6.9
3.7
Thermal Shock Resistance, points 19
15

Alloy Composition

Aluminum (Al), % 0 to 0.020
0
Carbon (C), % 0.080 to 0.12
0 to 0.015
Chromium (Cr), % 8.0 to 9.5
16.5 to 18.5
Iron (Fe), % 87.3 to 90.3
58.7 to 65.8
Manganese (Mn), % 0.3 to 0.6
0 to 2.0
Molybdenum (Mo), % 0.85 to 1.1
0 to 0.2
Nickel (Ni), % 0 to 0.4
14 to 16
Niobium (Nb), % 0.060 to 0.1
0
Nitrogen (N), % 0.030 to 0.070
0 to 0.1
Phosphorus (P), % 0 to 0.020
0 to 0.025
Silicon (Si), % 0.2 to 0.5
3.7 to 4.5
Sulfur (S), % 0 to 0.010
0 to 0.010
Titanium (Ti), % 0 to 0.010
0
Vanadium (V), % 0.18 to 0.25
0
Zirconium (Zr), % 0 to 0.010
0