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EN 1.4740 Stainless Steel vs. ASTM Grade HP Steel

Both EN 1.4740 stainless steel and ASTM grade HP steel are iron alloys. They have 56% of their average alloy composition in common. There are 22 material properties with values for both materials. Properties with values for just one material (10, in this case) are not shown.

For each property being compared, the top bar is EN 1.4740 stainless steel and the bottom bar is ASTM grade HP steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 260
140
Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 22
5.1
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 77
78

Thermal Properties

Latent Heat of Fusion, J/g 300
320
Maximum Temperature: Corrosion, °C 410
440
Maximum Temperature: Mechanical, °C 900
1100
Melting Completion (Liquidus), °C 1420
1370
Melting Onset (Solidus), °C 1370
1330
Specific Heat Capacity, J/kg-K 490
480
Thermal Conductivity, W/m-K 18
12
Thermal Expansion, µm/m-K 10
16

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
34
Density, g/cm3 7.6
7.9
Embodied Carbon, kg CO2/kg material 2.3
5.8
Embodied Energy, MJ/kg 32
82
Embodied Water, L/kg 120
220

Common Calculations

PREN (Pitting Resistance) 18
27
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Thermal Diffusivity, mm2/s 4.8
3.2

Alloy Composition

Carbon (C), % 0.3 to 0.5
0.35 to 0.75
Chromium (Cr), % 16 to 19
24 to 28
Iron (Fe), % 75.4 to 82.7
29.2 to 42.7
Manganese (Mn), % 0 to 1.0
0 to 2.0
Molybdenum (Mo), % 0 to 0.5
0 to 0.5
Nickel (Ni), % 0 to 1.0
33 to 37
Phosphorus (P), % 0 to 0.040
0 to 0.040
Silicon (Si), % 1.0 to 2.5
0 to 2.5
Sulfur (S), % 0 to 0.030
0 to 0.040