EN 1.5538 (37MnB5) Boron Steel
Other Steels
spheroidized and cold-drawn
Property Overview
Density7.8g/cm³
Elastic Modulus190GPa
Tensile Strength620MPa
Yield Strength480MPa
Brinell Hardness190HB
Maximum Service Temperature400°C
Chemical Composition
C
0.35 to 0.4%
CR
0 to 0.3%
MN
1.2 to 1.5%
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
97.2 to 98.5%
Mechanical
Elastic (Young's, Tensile) Modulus
190 GPa
Elongation at Break
11 %
Fatigue Strength
300 MPa
Poisson's Ratio
0.29
Reduction in Area
64 %
Shear Modulus
73 GPa
Shear Strength
370 MPa
Tensile Strength: Ultimate (UTS)
620 MPa
Tensile Strength: Yield (Proof)
480 MPa
Hardness
Brinell Hardness
190
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
18 points
Electrical
Electrical Conductivity: Equal Volume
7.2 % IACS
Electrical Conductivity: Equal Weight (Specific)
8.3 % IACS
Calculated
Resilience: Ultimate (Unit Rupture Work)
65 MJ/m 3
Resilience: Unit (Modulus of Resilience)
610 kJ/m 3
Stiffness to Weight: Axial
13 points
Stiffness to Weight: Bending
24 points
Strength to Weight: Axial
22 points
Strength to Weight: Bending
21 points
Environmental
Base Metal Price
2.0 % relative
Embodied Carbon
1.4 kg CO 2 /kg material
Embodied Energy
19 MJ/kg
Embodied Energy
19 MJ/kg 8.1 x 10 3 BTU/lb
Embodied Water
48 L/kg
Embodied Water
48 L/kg 5.7 gal/lb
Registered Designations & Aliases
1.55381.553837MnB537MnB5EN 1.5538 (37MnB5) Boron Steel
Standards
EN 10263-4 EN 10263-4: 2001 Steel rod, bars and wire for cold heading and cold extrusion. Technical delivery conditions for steels for quenching and tempering
EN 10263-4 EN 10263-4: Steel rod, bars and wire for cold heading and cold extrusion - Part 4: Technical delivery conditions for steels for quenching and tempering