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SAE-AISI 1049 Steel vs. EN 1.4309 Stainless Steel

Both SAE-AISI 1049 steel and EN 1.4309 stainless steel are iron alloys. They have 69% of their average alloy composition in common. There are 30 material properties with values for both materials. Properties with values for just one material (5, in this case) are not shown.

For each property being compared, the top bar is SAE-AISI 1049 steel and the bottom bar is EN 1.4309 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 200 to 220
140
Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 11 to 17
34
Fatigue Strength, MPa 250 to 400
170
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 72
77
Tensile Strength: Ultimate (UTS), MPa 680 to 750
490
Tensile Strength: Yield (Proof), MPa 370 to 640
210

Thermal Properties

Latent Heat of Fusion, J/g 250
290
Maximum Temperature: Mechanical, °C 400
960
Melting Completion (Liquidus), °C 1460
1420
Melting Onset (Solidus), °C 1420
1380
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 51
15
Thermal Expansion, µm/m-K 12
17

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.0
2.2
Electrical Conductivity: Equal Weight (Specific), % IACS 8.1
2.6

Otherwise Unclassified Properties

Base Metal Price, % relative 1.8
16
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 1.4
3.1
Embodied Energy, MJ/kg 18
45
Embodied Water, L/kg 46
150

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 75 to 99
140
Resilience: Unit (Modulus of Resilience), kJ/m3 370 to 1090
110
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 24 to 27
18
Strength to Weight: Bending, points 22 to 23
18
Thermal Diffusivity, mm2/s 14
4.1
Thermal Shock Resistance, points 22 to 24
11

Alloy Composition

Carbon (C), % 0.46 to 0.53
0 to 0.030
Chromium (Cr), % 0
18 to 20
Iron (Fe), % 98.5 to 98.9
64.2 to 73
Manganese (Mn), % 0.6 to 0.9
0 to 2.0
Nickel (Ni), % 0
9.0 to 12
Nitrogen (N), % 0
0 to 0.2
Phosphorus (P), % 0 to 0.040
0 to 0.035
Silicon (Si), % 0
0 to 1.5
Sulfur (S), % 0 to 0.050
0 to 0.025