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AISI 439 Stainless Steel vs. ASTM A27 Cast Steel

Both AISI 439 stainless steel and ASTM A27 cast steel are iron alloys. There are 30 material properties with values for both materials. Properties with values for just one material (6, in this case) are not shown.

For each property being compared, the top bar is AISI 439 stainless steel and the bottom bar is ASTM A27 cast steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 23
25 to 27
Fatigue Strength, MPa 170
170 to 230
Poisson's Ratio 0.28
0.29
Reduction in Area, % 51
34 to 40
Shear Modulus, GPa 77
73
Tensile Strength: Ultimate (UTS), MPa 490
460 to 550
Tensile Strength: Yield (Proof), MPa 250
230 to 310

Thermal Properties

Latent Heat of Fusion, J/g 280
250
Maximum Temperature: Mechanical, °C 890
400
Melting Completion (Liquidus), °C 1510
1460
Melting Onset (Solidus), °C 1430
1420
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 25
52
Thermal Expansion, µm/m-K 11
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.9
7.0 to 7.1
Electrical Conductivity: Equal Weight (Specific), % IACS 3.4
8.1

Otherwise Unclassified Properties

Base Metal Price, % relative 9.0
1.8
Density, g/cm3 7.7
7.8
Embodied Carbon, kg CO2/kg material 2.3
1.4
Embodied Energy, MJ/kg 34
18
Embodied Water, L/kg 120
45 to 46

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 95
96 to 120
Resilience: Unit (Modulus of Resilience), kJ/m3 160
140 to 260
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 18
16 to 20
Strength to Weight: Bending, points 18
17 to 19
Thermal Diffusivity, mm2/s 6.7
14
Thermal Shock Resistance, points 16
15 to 18