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ASTM A209 Steel vs. S41045 Stainless Steel

Both ASTM A209 steel and S41045 stainless steel are iron alloys. 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 ASTM A209 steel and the bottom bar is S41045 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 140 to 150
160
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 34
25
Fatigue Strength, MPa 180 to 200
160
Poisson's Ratio 0.29
0.28
Rockwell B Hardness 77 to 81
70
Shear Modulus, GPa 73
76
Shear Strength, MPa 280 to 310
280
Tensile Strength: Ultimate (UTS), MPa 420 to 460
430
Tensile Strength: Yield (Proof), MPa 220 to 250
230

Thermal Properties

Latent Heat of Fusion, J/g 250
270
Maximum Temperature: Mechanical, °C 410
740
Melting Completion (Liquidus), °C 1470
1450
Melting Onset (Solidus), °C 1420 to 1430
1400
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 50
29
Thermal Expansion, µm/m-K 13
10

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.1
2.9
Electrical Conductivity: Equal Weight (Specific), % IACS 8.1 to 8.2
3.3

Otherwise Unclassified Properties

Base Metal Price, % relative 2.4
8.5
Density, g/cm3 7.9
7.8
Embodied Carbon, kg CO2/kg material 1.5
2.2
Embodied Energy, MJ/kg 20
31
Embodied Water, L/kg 47
100

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 120 to 130
92
Resilience: Unit (Modulus of Resilience), kJ/m3 130 to 170
140
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 15 to 16
16
Strength to Weight: Bending, points 16 to 17
16
Thermal Diffusivity, mm2/s 13
7.8
Thermal Shock Resistance, points 12 to 14
16