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EN 1.4307 +C700 Steel vs. EN 1.4307 +C800 Steel

Both EN 1.4307 +C700 steel and EN 1.4307 +C800 steel are variants of the same material. They share alloy composition and many physical properties, but develop different mechanical properties as a result of different processing.

For each property being compared, the top bar is EN 1.4307 +C700 steel and the bottom bar is EN 1.4307 +C800 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 230
270
Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 22
14
Fatigue Strength, MPa 260
320
Impact Strength: V-Notched Charpy, J 91
91
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 77
77
Shear Strength, MPa 490
550
Tensile Strength: Ultimate (UTS), MPa 780
900
Tensile Strength: Yield (Proof), MPa 390
570

Thermal Properties

Latent Heat of Fusion, J/g 290
290
Maximum Temperature: Corrosion, °C 420
420
Maximum Temperature: Mechanical, °C 940
940
Melting Completion (Liquidus), °C 1430
1430
Melting Onset (Solidus), °C 1380
1380
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 15
15
Thermal Expansion, µm/m-K 16
16

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.4
2.4
Electrical Conductivity: Equal Weight (Specific), % IACS 2.7
2.7

Otherwise Unclassified Properties

Base Metal Price, % relative 15
15
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 3.0
3.0
Embodied Energy, MJ/kg 43
43
Embodied Water, L/kg 140
140

Common Calculations

PREN (Pitting Resistance) 19
19
Resilience: Ultimate (Unit Rupture Work), MJ/m3 150
110
Resilience: Unit (Modulus of Resilience), kJ/m3 390
810
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 28
32
Strength to Weight: Bending, points 24
27
Thermal Diffusivity, mm2/s 4.0
4.0
Thermal Shock Resistance, points 18
20

Alloy Composition

Carbon (C), % 0 to 0.030
0 to 0.030
Chromium (Cr), % 17.5 to 19.5
17.5 to 19.5
Iron (Fe), % 66.8 to 74.5
66.8 to 74.5
Manganese (Mn), % 0 to 2.0
0 to 2.0
Nickel (Ni), % 8.0 to 10.5
8.0 to 10.5
Nitrogen (N), % 0 to 0.1
0 to 0.1
Phosphorus (P), % 0 to 0.045
0 to 0.045
Silicon (Si), % 0 to 1.0
0 to 1.0
Sulfur (S), % 0 to 0.015
0 to 0.015