MakeItFrom.com
Menu (ESC)

AISI 418 Stainless Steel vs. ASTM A372 Grade M Steel

Both AISI 418 stainless steel and ASTM A372 grade M steel are iron alloys. They have 86% 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 418 stainless steel and the bottom bar is ASTM A372 grade M steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 330
240 to 280
Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 17
18 to 21
Fatigue Strength, MPa 520
450 to 520
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 77
73
Shear Strength, MPa 680
510 to 570
Tensile Strength: Ultimate (UTS), MPa 1100
810 to 910
Tensile Strength: Yield (Proof), MPa 850
660 to 770

Thermal Properties

Latent Heat of Fusion, J/g 270
250
Maximum Temperature: Mechanical, °C 770
450
Melting Completion (Liquidus), °C 1500
1460
Melting Onset (Solidus), °C 1460
1420
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 25
46
Thermal Expansion, µm/m-K 10
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.8
8.0
Electrical Conductivity: Equal Weight (Specific), % IACS 3.1
9.1

Otherwise Unclassified Properties

Base Metal Price, % relative 15
5.0
Density, g/cm3 8.0
7.9
Embodied Carbon, kg CO2/kg material 2.9
2.0
Embodied Energy, MJ/kg 41
27
Embodied Water, L/kg 110
61

Common Calculations

PREN (Pitting Resistance) 19
3.4
Resilience: Ultimate (Unit Rupture Work), MJ/m3 170
160
Resilience: Unit (Modulus of Resilience), kJ/m3 1830
1140 to 1580
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 38
29 to 32
Strength to Weight: Bending, points 29
24 to 27
Thermal Diffusivity, mm2/s 6.7
12
Thermal Shock Resistance, points 40
24 to 27

Alloy Composition

Carbon (C), % 0.15 to 0.2
0 to 0.23
Chromium (Cr), % 12 to 14
1.5 to 2.0
Iron (Fe), % 78.5 to 83.6
92.5 to 95.1
Manganese (Mn), % 0 to 0.5
0.2 to 0.4
Molybdenum (Mo), % 0 to 0.5
0.4 to 0.6
Nickel (Ni), % 1.8 to 2.2
2.8 to 3.9
Phosphorus (P), % 0 to 0.040
0 to 0.015
Silicon (Si), % 0 to 0.5
0 to 0.3
Sulfur (S), % 0 to 0.030
0 to 0.010
Tungsten (W), % 2.5 to 3.5
0
Vanadium (V), % 0
0 to 0.080