EN 1.5503 (18B2) Boron Steel
Other Steels
hot worked
Property Overview
Density7.8g/cm³
Elastic Modulus190GPa
Tensile Strength450MPa
Yield Strength270MPa
Brinell Hardness130HB
Maximum Service Temperature400°C
Chemical Composition
C
0.16 to 0.2%
MN
0.6 to 0.8%
SI
0 to 0.3%
P
0 to 0.025%
S
0 to 0.025%
CU
0 to 0.25%
B
0.00080 to 0.0050%
FE
98.4 to 99.239%
Mechanical
Elastic (Young's, Tensile) Modulus
190 GPa
Elongation at Break
17 %
Fatigue Strength
180 MPa
Poisson's Ratio
0.29
Reduction in Area
65 %
Shear Modulus
73 GPa
Shear Strength
270 MPa
Tensile Strength: Ultimate (UTS)
450 MPa
Tensile Strength: Yield (Proof)
270 MPa
Hardness
Brinell Hardness
130
Physical
Density
7.8 g/cm 3
Thermal
Latent Heat of Fusion
250 J/g
Maximum Temperature: Mechanical
400 °C
Melting Completion (Liquidus)
1460 °C
Melting Onset (Solidus)
1420 °C
Specific Heat Capacity
470 J/kg-K
Thermal Conductivity
52 W/m-K
Thermal Diffusivity
14 mm 2 /s
Thermal Expansion
13 µm/m-K
Thermal Shock Resistance
13 points
Electrical
Electrical Conductivity: Equal Volume
7.0 % IACS
Electrical Conductivity: Equal Weight (Specific)
8.1 % IACS
Calculated
Resilience: Ultimate (Unit Rupture Work)
64 MJ/m 3
Resilience: Unit (Modulus of Resilience)
200 kJ/m 3
Stiffness to Weight: Axial
13 points
Stiffness to Weight: Bending
24 points
Strength to Weight: Axial
16 points
Strength to Weight: Bending
17 points
Environmental
Base Metal Price
1.8 % relative
Embodied Carbon
1.4 kg CO 2 /kg material
Embodied Energy
18 MJ/kg
Embodied Energy
18 MJ/kg 7.9 x 10 3 BTU/lb
Embodied Water
46 L/kg
Embodied Water
46 L/kg 5.5 gal/lb
Registered Designations & Aliases
1.55031.550318B218B2EN 1.5503 (18B2) Boron Steel
Standards
EN 10263-3 EN 10263-3: 2001 Steel rod, bars and wire for cold heading and cold extrusion. Technical delivery conditions for case hardening steels
EN 10263-3 EN 10263-3: Steel rod, bars and wire for cold heading and cold extrusion - Part 3: Technical delivery conditions for case hardening steels