SAE-AISI 50B44 (G50441) Boron Steel
Alloy Steels
Property Overview
Density7.8g/cm³
Elastic Modulus190GPa
Tensile Strength570MPa
Yield Strength360MPa
Brinell Hardness170HB
Maximum Service Temperature410°C
Chemical Composition
C
0.43 to 0.48%
CR
0.2 to 0.6%
MN
0.75 to 1.0%
SI
0.15 to 0.35%
P
0 to 0.035%
S
0 to 0.040%
B
0.00050 to 0.0030%
FE
97.5 to 98.5%
Mechanical
Elastic (Young's, Tensile) Modulus
190 GPa
Elongation at Break
22 %
Fatigue Strength
250 MPa
Poisson's Ratio
0.29
Shear Modulus
73 GPa
Shear Strength
360 MPa
Tensile Strength: Ultimate (UTS)
570 MPa
Tensile Strength: Yield (Proof)
360 MPa
Hardness
Brinell Hardness
170
Physical
Density
7.8 g/cm 3
Thermal
Latent Heat of Fusion
250 J/g
Maximum Temperature: Mechanical
410 °C
Melting Completion (Liquidus)
1460 °C
Melting Onset (Solidus)
1420 °C
Specific Heat Capacity
470 J/kg-K
Thermal Conductivity
46 W/m-K
Thermal Diffusivity
12 mm 2 /s
Thermal Expansion
13 µm/m-K
Thermal Shock Resistance
17 points
Electrical
Electrical Conductivity: Equal Volume
7.2 % IACS
Electrical Conductivity: Equal Weight (Specific)
8.2 % IACS
Calculated
Resilience: Ultimate (Unit Rupture Work)
110 MJ/m 3
Resilience: Unit (Modulus of Resilience)
350 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
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
G50441SAE-AISI 50B44 (G50441) Boron Steel
Standards
ASTM A29 ASTM A29: Standard Specification for Steel Bars, Carbon and Alloy, Hot-Wrought, General Requirements for
ASTM A322 ASTM A322: Standard Specification for Steel Bars, Alloy, Standard Grades
ASTM A752 ASTM A752: Standard Specification for General Requirements for Wire Rods and Coarse Round Wire, Alloy Steel
ASTM A752 ASTM A752: Standard Specification for General Requirements for Wire Rods and Coarse Round Wire, Alloy Steel ASTM A322: Standard Specification for Steel Bars, Alloy, Standard Grades Boron in Steel, S. K. Banerji and J. E. Morral (editors), 1980 ASTM A29: Standard Specification for Steel Bars, Carbon and Alloy, Hot-Wrought, General Requirements for