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Annealed AISI 304L vs. Annealed SAE-AISI M4

Both annealed AISI 304L and annealed SAE-AISI M4 are iron alloys. Both are furnished in the annealed condition. They have 75% of their average alloy composition in common. There are 24 material properties with values for both materials. Properties with values for just one material (12, in this case) are not shown.

For each property being compared, the top bar is annealed AISI 304L and the bottom bar is annealed SAE-AISI M4.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 170
230
Elastic (Young's, Tensile) Modulus, GPa 200
200
Poisson's Ratio 0.28
0.29
Rockwell B Hardness 79
100
Shear Modulus, GPa 77
76
Tensile Strength: Ultimate (UTS), MPa 540
770

Thermal Properties

Latent Heat of Fusion, J/g 290
260
Melting Completion (Liquidus), °C 1450
1610
Melting Onset (Solidus), °C 1400
1560
Specific Heat Capacity, J/kg-K 480
440
Thermal Conductivity, W/m-K 16
25
Thermal Expansion, µm/m-K 17
12

Otherwise Unclassified Properties

Base Metal Price, % relative 16
25
Density, g/cm3 7.8
8.3
Embodied Carbon, kg CO2/kg material 3.1
14
Embodied Energy, MJ/kg 44
210
Embodied Water, L/kg 150
110

Common Calculations

PREN (Pitting Resistance) 20
30
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
23
Strength to Weight: Axial, points 19
26
Strength to Weight: Bending, points 19
23
Thermal Diffusivity, mm2/s 4.2
6.9
Thermal Shock Resistance, points 12
24

Alloy Composition

Carbon (C), % 0 to 0.030
1.3 to 1.4
Chromium (Cr), % 18 to 20
3.8 to 4.8
Copper (Cu), % 0
0 to 0.25
Iron (Fe), % 65 to 74
75.9 to 81.4
Manganese (Mn), % 0 to 2.0
0.15 to 0.4
Molybdenum (Mo), % 0
4.3 to 5.5
Nickel (Ni), % 8.0 to 12
0 to 0.3
Nitrogen (N), % 0 to 0.1
0
Phosphorus (P), % 0 to 0.045
0 to 0.030
Silicon (Si), % 0 to 0.75
0.2 to 0.45
Sulfur (S), % 0 to 0.030
0 to 0.030
Tungsten (W), % 0
5.3 to 6.5
Vanadium (V), % 0
3.8 to 4.5