MakeItFrom.com
Menu (ESC)

SAE-AISI M4 Steel vs. ASTM A369 Grade FP91

Both SAE-AISI M4 steel and ASTM A369 grade FP91 are iron alloys. They have 85% of their average alloy composition in common. There are 22 material properties with values for both materials. Properties with values for just one material (10, in this case) are not shown.

For each property being compared, the top bar is SAE-AISI M4 steel and the bottom bar is ASTM A369 grade FP91.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
190
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 76
75
Tensile Strength: Ultimate (UTS), MPa 770 to 2150
670

Thermal Properties

Latent Heat of Fusion, J/g 260
270
Melting Completion (Liquidus), °C 1610
1460
Melting Onset (Solidus), °C 1560
1420
Specific Heat Capacity, J/kg-K 440
470
Thermal Conductivity, W/m-K 25
26
Thermal Expansion, µm/m-K 12
13

Otherwise Unclassified Properties

Base Metal Price, % relative 25
7.0
Density, g/cm3 8.3
7.8
Embodied Carbon, kg CO2/kg material 14
2.6
Embodied Energy, MJ/kg 210
37
Embodied Water, L/kg 110
88

Common Calculations

PREN (Pitting Resistance) 30
13
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 23
25
Strength to Weight: Axial, points 26 to 72
24
Strength to Weight: Bending, points 23 to 45
22
Thermal Diffusivity, mm2/s 6.9
6.9
Thermal Shock Resistance, points 24 to 68
18

Alloy Composition

Aluminum (Al), % 0
0 to 0.020
Carbon (C), % 1.3 to 1.4
0.080 to 0.12
Chromium (Cr), % 3.8 to 4.8
8.0 to 9.5
Copper (Cu), % 0 to 0.25
0
Iron (Fe), % 75.9 to 81.4
87.3 to 90.3
Manganese (Mn), % 0.15 to 0.4
0.3 to 0.6
Molybdenum (Mo), % 4.3 to 5.5
0.85 to 1.1
Nickel (Ni), % 0 to 0.3
0 to 0.4
Niobium (Nb), % 0
0.060 to 0.1
Nitrogen (N), % 0
0.030 to 0.070
Phosphorus (P), % 0 to 0.030
0 to 0.025
Silicon (Si), % 0.2 to 0.45
0.2 to 0.5
Sulfur (S), % 0 to 0.030
0 to 0.025
Titanium (Ti), % 0
0 to 0.010
Tungsten (W), % 5.3 to 6.5
0
Vanadium (V), % 3.8 to 4.5
0.18 to 0.25
Zirconium (Zr), % 0
0 to 0.010