AISI 1045 steel structure has a low through-hardening capability with only sections of size around 60 mm being recommended as suitable for tempering and through-hardening. However, 1045 steel structure can be efficiently flame or induction hardened in the normalized or hot rolled condition to obtain surface hardnesses in the range of Rc 54 - Rc 60 based on factors such as section size, type of set up, quenching medium used etc.
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1045 steel structure Chemical composition:
C(%): 0.43~0.50
Mn(%): 0.60~0.90
P(%)≤: 0.040
S(%)≤: 0.050
1045 steel structure Mechanical Properties
Mechanical Properties | Metric | Imperial |
Hardness, Brinell | 163 | 163 |
Hardness, Knoop (Converted from Brinell hardness) | 184 | 184 |
Hardness, Rockwell B (Converted from Brinell hardness) | 84 | 84 |
Hardness, Vickers (Converted from Brinell hardness) | 170 | 170 |
Tensile Strength, Ultimate | 565 MPa | 81900 psi |
Tensile Strength, Yield | 310 MPa | 45000 psi |
Elongation at Break (in 50 mm) | 16.0 % | 16.0 % |
Reduction of Area | 40.0 % | 40.0 % |
Modulus of Elasticity (Typical for steel) | 200 GPa | 29000 ksi |
Bulk Modulus (Typical for steel) | 140 GPa | 20300 ksi |
Poissons Ratio (Typical For Steel) | 0.290 | 0.290 |
Shear Modulus (Typical for steel) | 80 GPa | 11600 ksi |
1045 steel structure MACHINABILITY
Machinability of 1045 steel structure is good providing the full annealing cycle described above is used, ensuring a coarse lamellar pearlite to coarse spheroidite microstructure.
1045 steel structure WELDABILITY
1045 steel structure is readily welded with the correct procedure. Welding in the through hardened or flame or induction hardened conditions is not recommended.
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