EN 1.5511 (35B2) Boron Steel
Other Steels
quenched and tempered
Property Overview
Density7.8g/cm³
Elastic Modulus190GPa
Tensile Strength580MPa
Yield Strength340MPa
Brinell Hardness170HB
Maximum Service Temperature400°C
Chemical Composition
C
0.32 to 0.39%
MN
0.5 to 0.8%
SI
0 to 0.4%
P
0 to 0.030%
S
0 to 0.015%
AL
0.020 to 0.060%
B
0.00080 to 0.0050%
FE
98.3 to 99.159%
Mechanical
Elastic (Young's, Tensile) Modulus
190 GPa
Elongation at Break
25 %
Fatigue Strength
240 MPa
Impact Strength: V-Notched Charpy
62 J
Poisson's Ratio
0.29
Reduction in Area
51 %
Shear Modulus
72 GPa
Shear Strength
370 MPa
Tensile Strength: Ultimate (UTS)
580 MPa
Tensile Strength: Yield (Proof)
340 MPa
Hardness
Brinell Hardness
170
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
51 W/m-K
Thermal Diffusivity
14 mm 2 /s
Thermal Expansion
13 µm/m-K
Thermal Shock Resistance
17 points
Electrical
Electrical Conductivity: Equal Volume
7.1 % IACS
Electrical Conductivity: Equal Weight (Specific)
8.1 % IACS
Calculated
Resilience: Ultimate (Unit Rupture Work)
120 MJ/m 3
Resilience: Unit (Modulus of Resilience)
300 kJ/m 3
Stiffness to Weight: Axial
13 points
Stiffness to Weight: Bending
24 points
Strength to Weight: Axial
20 points
Strength to Weight: Bending
20 points
Environmental
Base Metal Price
1.8 % relative
Embodied Carbon
1.4 kg CO 2 /kg material
Embodied Energy
19 MJ/kg
Embodied Energy
19 MJ/kg 8.0 x 10 3 BTU/lb
Embodied Water
46 L/kg
Embodied Water
46 L/kg 5.5 gal/lb
Registered Designations & Aliases
1.55111.551135B235B2EN 1.5511 (35B2) Boron Steel
Standards
EN 10269 EN 10269: 1999 Steels and nickel alloys for fasteners with specified elevated and/or low temperature properties
EN 10269 EN 10269: Steels and nickel alloys for fasteners with specified elevated and/or low temperature properties
EN 10269 EN 10269: Steels and nickel alloys for fasteners with specified elevated and/or low temperature properties Boron in Steel, S. K. Banerji and J. E. Morral (editors), 1980 Manufacture and Uses of Alloy Steels, Henry D. Hibbard, 2005