MakeItFrom.com
Menu (ESC)

AISI 431 Stainless Steel vs. ASTM A387 Grade 2 Steel

Both AISI 431 stainless steel and ASTM A387 grade 2 steel are iron alloys. They have 83% 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 AISI 431 stainless steel and the bottom bar is ASTM A387 grade 2 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 250
140 to 170
Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 15 to 17
25
Fatigue Strength, MPa 430 to 610
190 to 250
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 77
73
Shear Strength, MPa 550 to 840
300 to 350
Tensile Strength: Ultimate (UTS), MPa 890 to 1380
470 to 550
Tensile Strength: Yield (Proof), MPa 710 to 1040
260 to 350

Thermal Properties

Latent Heat of Fusion, J/g 280
250
Maximum Temperature: Mechanical, °C 850
420
Melting Completion (Liquidus), °C 1510
1470
Melting Onset (Solidus), °C 1450
1420
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 26
45
Thermal Expansion, µm/m-K 12
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.6
7.2
Electrical Conductivity: Equal Weight (Specific), % IACS 3.0
8.3

Otherwise Unclassified Properties

Base Metal Price, % relative 9.0
2.6
Density, g/cm3 7.7
7.9
Embodied Carbon, kg CO2/kg material 2.2
1.6
Embodied Energy, MJ/kg 31
20
Embodied Water, L/kg 120
50

Common Calculations

PREN (Pitting Resistance) 16
2.4
Resilience: Ultimate (Unit Rupture Work), MJ/m3 140 to 180
98 to 120
Resilience: Unit (Modulus of Resilience), kJ/m3 1270 to 2770
180 to 320
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 32 to 50
16 to 20
Strength to Weight: Bending, points 27 to 36
17 to 19
Thermal Diffusivity, mm2/s 7.0
12
Thermal Shock Resistance, points 28 to 43
14 to 16

Alloy Composition

Carbon (C), % 0 to 0.2
0.050 to 0.21
Chromium (Cr), % 15 to 17
0.5 to 0.8
Iron (Fe), % 78.2 to 83.8
97.1 to 98.3
Manganese (Mn), % 0 to 1.0
0.55 to 0.8
Molybdenum (Mo), % 0
0.45 to 0.6
Nickel (Ni), % 1.3 to 2.5
0
Phosphorus (P), % 0 to 0.040
0 to 0.025
Silicon (Si), % 0 to 1.0
0.15 to 0.4
Sulfur (S), % 0 to 0.030
0 to 0.025