AISI 1045 Carbon Steel – ASTM A29

WALDUN is a Chinese AISI 1045 steel Manufacturer and Exporter, can supply with round,square,flat,block,and shaft etc.

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 and 210.

AISI 1045 steel has 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.

AISI 1045 Carbon Steel Supply Form & Size & Tolerance

Supply Form	Size(mm)	Process	Tolerance
Round	Φ6-Φ100	Cold Drawn	Bright/Black	Best H11
	Φ16-Φ350	Hot Rolled	Black	-0/+1mm
			Peeled/ground	Best H11
	Φ90-Φ1000	Hot Forged	Black	-0/+5mm
			Rough Turned	-0/+3mm
Flat/Square/Block	Thickness :120-800	Hot Forged	Black	-0/+8mm
	Width:120-1500		Rough Machined	-0/+3mm

 AISI 1045 Carbon Steel Chemical Composition per ASTM A29

GRADE	C	Si	Mn	P	S
1045	0.43-0.50	0.15-0.35	0.60-0.90	≤ 0.040	≤ 0.050

AISI 1045 Properties

AISI 1045 Density, g/cm3	7.87
AISI 1045 Melting point °C	1495
AISI 1045 Modulus of Elasticity, psi	29 x 10^6
AISI 1045 Coefficient of Thermal Expansion, 68-212˚F, /˚F	6.39 x 10^-6
AISI 1045 Thermal Conductivity, Btu/ft hr ˚F	30
AISI 1045 Specific Heat, Btu/lb ˚F	0.116
AISI 1045 Electrical Resistivity, Microhm-in	6.42

 AISI 1045 Equivalent grades

EU EN

USA –

Germany DIN,WNr

Japan JIS

France AFNOR

England BS

Italy UNI

Spain UNE

China GB

Sweden SS

Finland SFS

Russia GOST

Inter ISO

C45E (1.1191)

1045

Ck45

S45C

XC45 XC48H1

080M46 CFS8

C45

C45k F1140

45 45H

1672

C45

45

C45E4

Cross reference table for Steel 1045 ( AISI, ASTM, UNS) and its European equivalent C45E (1.1191) ( EN )

AISI 1045 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:

1045 Forging

Heat AISI 1045 with two steps,first heat the temperature to 750 ^oC – 800 ^oC ,hold for suitable time,then heat the temperature up to 1100 ^oC – 1200 ^oC,hold enough time for the steel to be thoroughly heated.Minimum forging temperature 850°C,so don’t forge below it.AISI 1045 steel should be cooled as slowly as possible in still air or in sand after forged.

AISI 1045 Normalizing

Normalizing temperature for AISI 1045 steel should be carried out between 870℃-920℃. hold suitable time for the steel to be thoroughly heated to  complete the ferrite to austenite transformation.Soak for 10 – 15 minutes,then cool in still air.

AISI 1045 Annealing

AISI 1045 should be carried our at a nominal temperature of 800℃-850℃,hold suitable time for the steel to be thoroughly heated, then furnace cooling.

AISI 1045 Hardening

AISI 1045 can be hardened to increase surface hardness and strength.It is usually heated to temperature  820^oC – 860^oC,hold suitable time for the steel to be heated uniformly,soak for 10 -15 minutes per 25mm of section, and quench in water or oil.Tempering should be followed immediately after quenched.

AISI 1045 Tempering

AISI 1045 steel is usually heated to 400^oC – 650^oC as required, hold until temperature is uniform throughout the section, soak for 1 hour per 25mm of section, and cool in still air.

AISI 1045 Application

Compared with AISI 1020,AISI 1045 has low alloy,but can be flamed or induction hardening to obtain high strength,and is widely used in many industries which require more strength,wear resistance,

Typical applications includes Axles,Bolts, Connecting Rods, Hydraulic Clamps ,Rams, Pins , Rolls, Studs, Shafts, Spindles, Sockets, Light gears etc.

FAQ About AISI 1045 Carbon Steel – ASTM A29

What grade of steel is 1045?

1045 steel is a medium carbon steel that offers better mechanical properties than 1018 steel, as well as a higher level of wear resistance. 1045 steel can be heat treated to achieve a wide range of hardness levels, from HRC 22 to HRC 60. 1045 steel is typically used in applications where greater strength and wear resistance are required, such as gears, shafts, axles, and crankshafts. 1045 steel is also often used in 1045 Steel 1045 is a medium-carbon steel, made with 0.44%-0.50% carbon. It has moderate ductility and strength, plus good machinability and weldability. 1045 is stronger than most of the common low-carbon steels like 1018 & 1020, but with similar malleability.. 1045 is available in rounds, squares, flats, hexagons and other shapes. Its finishes include hot roll Annealed (HR), Cold Drawn (CD) & Turned Ground & Polished (TG&P). The hot roll 1045 TGP shafting meets ASTM A108 Grade 1045 specifications and standards. Tensile strength 125ksi min Yield strength: 85 ksi min Elongation: 12% in 2″.

Is 1045 a good steel?

1045 steel is a popular choice for a wide range of applications, from tools and machinery to automotive parts. Its popularity is due to its good weldability, toughness, strength, and affordability. 1045 steel also has good machinability and can be heat treated for greater hardness. While 1045 steel is not as corrosion resistant as other types of steel, it can be treated with a coating or paint to improve its durability. Overall, 1045 steel is a versatile and affordable option that is well suited for a variety of applications.

What does 1045 mean in steel?

1045 steel is a type of low-carbon steel that contains between 0.4 and 0.5 percent carbon. 1045 steel is often used in applications where strength, hardness, and wear resistance are required. 1045 steel can be heat treated to produce a wide range of properties, including increased hardness and strength, improved machinability, and improved weldability. 1045 steel is also often used in applications where high temperatures are required, such as in furnaces and forge work. 1045 steel is available in a wide range of shapes, including rounds, squares, flats, and Hexagons. 1045 steel can also be supplied in a variety of surface finishes, including hot-rolled, cold-rolled, annealed, or normalized.

CAN 1045 steel be welded?

1045 steel can be welded using all standard welding methods. However, it is important to note that 1045 steel has a high carbon content, which can make it susceptible to cracking. As a result, it is important to use a low-hydrogen welding process and to avoid any sudden cooling of the weld area. In addition, it is often necessary to perform a post-weld heat treatment in order to relieve stresses and promote healing of the weld area. With proper care and attention, 1045 steel can be successfully welded without any difficulty.

What is the difference between 1045 and 4140 steel?

1045 steel is a medium-carbon steel that offers better mechanical properties than 1018 Steel and other lower carbon steels. 1045 is ideal for applications requiring greater strength and wear resistance. 1045 has the most common of the hot-rolled steels. It is suitable for shafts, gears and forgings. 1045 should be normalized before heat treatment. 4140 steel is a low alloy steel that contains chromium, molybdenum, and manganese. 4140 is an oil-hardening steel that can be heat treated to a variety of hardness levels. 4140 offers good wear resistance and toughness in contrast to other quenched and tempered steels. 4140 is typically used in applications where strength, hardness, and abrasion resistance are required. The difference between 1045 and 4140 steels is that 1045 is a medium-carbon steel whereas 4140 is a low alloy steel containing chromium and molybdenum. 1045 is ideal for applications requiring greater strength and wear resistance whereas 4140 is suited for applications where strength, hardness, and abrasion resistance are required.

Can a 1045 be hardened?

1045 steel is a versatile medium carbon steel that can be heat-treated, forged, and normalized. 1045 can be used for a variety of applications including gears, shafts, axles, and bolts. 1045 is available in a variety of shapes including round, square, and rectangle. 1045 can be hardened by heating the steel to approximately 1700 degrees Fahrenheit and then quenching in water or oil. 1045 can also be annealed by heating the steel to approximately 1500 degrees Fahrenheit and then cooling in a furnace. 1045 is a versatile steel that can be used for a variety of applications.

What is 1045 carbon steel used for?

1045 steel is a medium-carbon steel that offers better mechanical properties than 1018 steel and other lower-carbon steels. Its strength, durability, and dimensional stability make 1045 steel well-suited for applications requiringma high degree of wear resistance. 1045 steel can be heat-treated to obtain a wide range of hardness levels, from HRC22 for soft applications to HRC60 for maximum wear resistance. 1045 carbon steel also offers good weldability, machinability, and can be normalized or annealed after heat treatment. 1045 carbon steel is commonly used in the automotive and construction industries for a variety of applications.

Other Related Steel