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EN 1.4938 Stainless Steel vs. ASTM Grade HP Steel

Both EN 1.4938 stainless steel and ASTM grade HP steel are iron alloys. They have 51% of their average alloy composition in common. There are 29 material properties with values for both materials. Properties with values for just one material (4, in this case) are not shown.

For each property being compared, the top bar is EN 1.4938 stainless steel and the bottom bar is ASTM grade HP steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 16 to 17
5.1
Fatigue Strength, MPa 390 to 520
130
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 76
78
Tensile Strength: Ultimate (UTS), MPa 870 to 1030
490
Tensile Strength: Yield (Proof), MPa 640 to 870
260

Thermal Properties

Latent Heat of Fusion, J/g 270
320
Maximum Temperature: Corrosion, °C 390
440
Maximum Temperature: Mechanical, °C 750
1100
Melting Completion (Liquidus), °C 1460
1370
Melting Onset (Solidus), °C 1420
1330
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 30
12
Thermal Expansion, µm/m-K 11
16

Otherwise Unclassified Properties

Base Metal Price, % relative 10
34
Density, g/cm3 7.8
7.9
Embodied Carbon, kg CO2/kg material 3.3
5.8
Embodied Energy, MJ/kg 47
82
Embodied Water, L/kg 110
220

Common Calculations

PREN (Pitting Resistance) 18
27
Resilience: Ultimate (Unit Rupture Work), MJ/m3 140 to 160
21
Resilience: Unit (Modulus of Resilience), kJ/m3 1050 to 1920
170
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 31 to 37
17
Strength to Weight: Bending, points 26 to 29
17
Thermal Diffusivity, mm2/s 8.1
3.2
Thermal Shock Resistance, points 30 to 35
11

Alloy Composition

Carbon (C), % 0.080 to 0.15
0.35 to 0.75
Chromium (Cr), % 11 to 12.5
24 to 28
Iron (Fe), % 80.5 to 84.8
29.2 to 42.7
Manganese (Mn), % 0.4 to 0.9
0 to 2.0
Molybdenum (Mo), % 1.5 to 2.0
0 to 0.5
Nickel (Ni), % 2.0 to 3.0
33 to 37
Nitrogen (N), % 0.020 to 0.040
0
Phosphorus (P), % 0 to 0.025
0 to 0.040
Silicon (Si), % 0 to 0.5
0 to 2.5
Sulfur (S), % 0 to 0.015
0 to 0.040
Vanadium (V), % 0.25 to 0.4
0