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AISI 304N Stainless Steel vs. ASTM A372 Grade K Steel

Both AISI 304N stainless steel and ASTM A372 grade K steel are iron alloys. They have 75% of their average alloy composition in common. There are 32 material properties with values for both materials. Properties with values for just one material (1, in this case) are not shown.

For each property being compared, the top bar is AISI 304N stainless steel and the bottom bar is ASTM A372 grade K steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 190 to 360
230
Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 9.1 to 45
23
Fatigue Strength, MPa 220 to 440
440
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 77
73
Shear Strength, MPa 420 to 700
490
Tensile Strength: Ultimate (UTS), MPa 620 to 1180
780
Tensile Strength: Yield (Proof), MPa 270 to 850
620

Thermal Properties

Latent Heat of Fusion, J/g 290
250
Maximum Temperature: Mechanical, °C 960
440
Melting Completion (Liquidus), °C 1420
1460
Melting Onset (Solidus), °C 1380
1420
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 16
48
Thermal Expansion, µm/m-K 16
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.4
7.8
Electrical Conductivity: Equal Weight (Specific), % IACS 2.7
8.9

Otherwise Unclassified Properties

Base Metal Price, % relative 15
4.4
Density, g/cm3 7.8
7.9
Embodied Carbon, kg CO2/kg material 3.0
1.8
Embodied Energy, MJ/kg 43
24
Embodied Water, L/kg 150
57

Common Calculations

PREN (Pitting Resistance) 21
2.7
Resilience: Ultimate (Unit Rupture Work), MJ/m3 98 to 280
160
Resilience: Unit (Modulus of Resilience), kJ/m3 180 to 1830
1010
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 22 to 42
27
Strength to Weight: Bending, points 21 to 32
24
Thermal Diffusivity, mm2/s 4.2
13
Thermal Shock Resistance, points 14 to 26
23

Alloy Composition

Carbon (C), % 0 to 0.080
0 to 0.18
Chromium (Cr), % 18 to 20
1.0 to 1.8
Iron (Fe), % 66.4 to 73.9
93.4 to 96.6
Manganese (Mn), % 0 to 2.0
0.1 to 0.4
Molybdenum (Mo), % 0
0.2 to 0.6
Nickel (Ni), % 8.0 to 10.5
2.0 to 3.3
Nitrogen (N), % 0.1 to 0.16
0
Phosphorus (P), % 0 to 0.045
0 to 0.015
Silicon (Si), % 0 to 0.75
0.15 to 0.35
Sulfur (S), % 0 to 0.030
0 to 0.010