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AISI 434 Stainless Steel vs. ASTM A372 Grade K Steel

Both AISI 434 stainless steel and ASTM A372 grade K steel are iron alloys. They have 83% of their average alloy composition in common. There are 32 material properties with values for both materials. Properties with values for just one material (3, in this case) are not shown.

For each property being compared, the top bar is AISI 434 stainless steel and the bottom bar is ASTM A372 grade K steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 170
230
Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 24
23
Fatigue Strength, MPa 220
440
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 78
73
Shear Strength, MPa 330
490
Tensile Strength: Ultimate (UTS), MPa 520
780
Tensile Strength: Yield (Proof), MPa 320
620

Thermal Properties

Latent Heat of Fusion, J/g 280
250
Maximum Temperature: Mechanical, °C 880
440
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
48
Thermal Expansion, µm/m-K 10
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.5
7.8
Electrical Conductivity: Equal Weight (Specific), % IACS 2.9
8.9

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
4.4
Density, g/cm3 7.7
7.9
Embodied Carbon, kg CO2/kg material 2.4
1.8
Embodied Energy, MJ/kg 33
24
Embodied Water, L/kg 120
57

Common Calculations

PREN (Pitting Resistance) 20
2.7
Resilience: Ultimate (Unit Rupture Work), MJ/m3 110
160
Resilience: Unit (Modulus of Resilience), kJ/m3 260
1010
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 19
27
Strength to Weight: Bending, points 18
24
Thermal Diffusivity, mm2/s 6.7
13
Thermal Shock Resistance, points 19
23

Alloy Composition

Carbon (C), % 0 to 0.12
0 to 0.18
Chromium (Cr), % 16 to 18
1.0 to 1.8
Iron (Fe), % 78.6 to 83.3
93.4 to 96.6
Manganese (Mn), % 0 to 1.0
0.1 to 0.4
Molybdenum (Mo), % 0.75 to 1.3
0.2 to 0.6
Nickel (Ni), % 0
2.0 to 3.3
Phosphorus (P), % 0 to 0.040
0 to 0.015
Silicon (Si), % 0 to 1.0
0.15 to 0.35
Sulfur (S), % 0 to 0.030
0 to 0.010