1045 Piastra in acciaio al carbonio

Spacification

AISI 1045 steel is a medium tensile steel supplied in a black hot-rolled or normalized condition. It has a tensile strength of 570 – 700 MPa and Brinell hardness ranging between 170 E 210.

AISI 1045 steel is characterized by good weldability, good machinability, and high strength and impact properties in either the normalized or hot-rolled condition.

AISI 1045 steel has a low through-hardening capability with only sections of around 60 mm in size being recommended as suitable for tempering and through-hardening. However, it 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.

AISI 1045 steel lacks suitable alloying elements and hence does not respond to the nitriding process.

Composizione chimica

Element	Contenuto
Carbonio, C	0.420 – 0.50 %
Iron, Fe	98.51 – 98.98 %
Manganese, Mn	0.60 – 0.90 %
Phosphorous, P	≤ 0.040 %
Sulfur, S	≤ 0.050 %

Physical Properties

Physical Properties	Metric	Imperial
Density	7.87 g/cc	0.284 lb/in³

Proprietà meccaniche

Proprietà meccaniche	Metric	Imperial
Durezza, Brinell	163	163
Durezza, Knoop (Converted from Brinell hardness)	184	184
Durezza, Rockwell B (Converted from Brinell hardness)	84	84
Durezza, Vickers (Converted from Brinell hardness)	170	170
Resistenza alla trazione, Definitivo	565 MPa	81900 psi
Resistenza alla trazione, Yield	310 MPa	45000 psi
Allungamento a rottura (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
Modulo di taglio (Typical for steel)	80 GPa	11600 ksi

Applicazioni

AISI 1045 is widely used for all industrial applications requiring more wear-resistance and strength. Typical applications of AISI 1045 are as follows:

Gears	Pins	Rams
Shafts	Rolls	Sockets
Axles	Spindles	Worms
Bolts	Ratchets	Light gears
Studs	Crankshafts	Guide rods
Connecting rods	Torsion bars	Hydraulic clamps

Heat Treatment

AISI 1045 is subjected to forging, annealing, normalizing, stress-relieving, hardening and tempering processes – each of which is explained in more detail below:

Forgiatura – Heat to 850°C – 1250°C (1562°F – 2282°F). Hold until the temperature is uniform. Cool in a furnace.
Ricottura – Heat to 800°C – 850°C (1472°F – 1562°F). Hold until the temperature is uniform. Cool in a furnace.
Normalizing – Heat to 870°C – 920°C (1598°F-1688°F). Hold until the temperature is uniform. Soak for 10 – 15 minutes. Cool in still air.
Stress-Relieving – Heat to 550°C – 660°C (1022°F – 1220°F). Hold until the temperature is uniform. Soak for 1 hour per 25mm of section. Cool in still air.
Indurimento – Heat to 820°C – 850°C (1508°F – 1562°F). Hold until the temperature is uniform. Soak for 10 – 15 minutes per 25mm of section. Quench in water or brine.
Tempering – Re-heat to 400°C – 650°C (752°F – 1202°F) as required. Hold until the temperature is uniform. Soak for 1 hour per 25mm of section. Cool in still air.

Applicazioni

AISI 1045 is widely used for all industrial applications requiring more wear-resistance and strength. Typical applications of AISI 1045 are as follows: