MakeItFrom.com
Menu (ESC)

ASTM A387 Grade 91 Class 2 vs. S44635 Stainless Steel

Both ASTM A387 grade 91 class 2 and S44635 stainless steel are iron alloys. They have 76% 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 S44635 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 200
240
Elastic (Young's, Tensile) Modulus, GPa 190
210
Elongation at Break, % 20
23
Fatigue Strength, MPa 330
390
Poisson's Ratio 0.28
0.27
Shear Modulus, GPa 75
81
Shear Strength, MPa 420
450
Tensile Strength: Ultimate (UTS), MPa 670
710
Tensile Strength: Yield (Proof), MPa 470
580

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 1420
1420
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 26
16
Thermal Expansion, µm/m-K 13
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 8.9
2.2
Electrical Conductivity: Equal Weight (Specific), % IACS 10
2.5

Otherwise Unclassified Properties

Base Metal Price, % relative 7.0
22
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 2.6
4.4
Embodied Energy, MJ/kg 37
62
Embodied Water, L/kg 88
170

Common Calculations

PREN (Pitting Resistance) 13
39
Resilience: Ultimate (Unit Rupture Work), MJ/m3 120
150
Resilience: Unit (Modulus of Resilience), kJ/m3 580
810
Stiffness to Weight: Axial, points 14
15
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 24
25
Strength to Weight: Bending, points 22
23
Thermal Diffusivity, mm2/s 6.9
4.4
Thermal Shock Resistance, points 19
23

Alloy Composition

Aluminum (Al), % 0 to 0.020
0
Carbon (C), % 0.080 to 0.12
0 to 0.025
Chromium (Cr), % 8.0 to 9.5
24.5 to 26
Iron (Fe), % 87.3 to 90.3
61.5 to 68.5
Manganese (Mn), % 0.3 to 0.6
0 to 1.0
Molybdenum (Mo), % 0.85 to 1.1
3.5 to 4.5
Nickel (Ni), % 0 to 0.4
3.5 to 4.5
Niobium (Nb), % 0.060 to 0.1
0.2 to 0.8
Nitrogen (N), % 0.030 to 0.070
0 to 0.035
Phosphorus (P), % 0 to 0.020
0 to 0.040
Silicon (Si), % 0.2 to 0.5
0 to 0.75
Sulfur (S), % 0 to 0.010
0 to 0.030
Titanium (Ti), % 0 to 0.010
0.2 to 0.8
Vanadium (V), % 0.18 to 0.25
0
Zirconium (Zr), % 0 to 0.010
0