AISI 1045 Carbon Steel | Din 1.1191 | C45E | S45C
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.
1. AISI 1045 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 | ||
2. AISI 1045 Chemical Composition
| Standard | Grade | C | Si | Mn | P | S | Cr |
| ASTM A29 | 1045 | 0.43-0.50 | - | 0.60-0.90 | ≤0.04 | ≤0.05 | - |
| EN 10083-2 | C45 | 0.42-0.50 | ≤0.04 | 0.50-0.90 | ≤0.03 | ≤0.035 | ≤0.4 |
| 1.1191 | |||||||
| JIS G4051 | S45C | 0.42-0.48 | 0.15-0.35 | 0.60-0.90 | ≤0.03 | ≤0.035 | - |
3. 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 |
4. 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) |
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Cross reference table for Steel 1045 ( AISI, ASTM, UNS) and its European equivalent C45E (1.1191) ( EN )
5. AISI 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 820oC – 860oC,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 400oC – 650oC as required, hold until temperature is uniform throughout the section, soak for 1 hour per 25mm of section, and cool in still air.
6.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.
