Carbon Steel S45c 6u342s

CARBON STEEL S45C/ST60/AISI 1045 BY · OCTOBER 16, 2014

S45C steel is a medium tensile steel supplied in the black hot rolled or normalized condition. It has a tensile strength of 570 – 700 MPa and Brinell hardness ranging between 170 and 210. S45C steel is characterized by good weldability, good machinability, and high strength and impact properties in either the normalized or hot rolled condition. S45C steel has a low through-hardening capability with only sections of size around 60 mm 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. Size Availability: Round Bar: 13-560mm Equivalent S45C, ST60, AISI 1045, DIN C45, CK45, CF45, CQ45,ASTM A29 , ASTM A510 , ASTM A519 , ASTM A576 , ASTM A682, SAE J403 , SAE J412 , SAE J414, EN-8 / BS 970 080M40 Composition(%) Show entries 10

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C 0.42-0.48

Si 0.15-0.35

Mn 0.60-0.90

Ni

Cr

Mo

-

-

-

max

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Heat Treatment (°C) (Hardening)

820-870 (Water quenching)

(Tempering)

550-650 (Rapid cooling

Hardness (Annealed)

(Tempered)

167-229 HB

314-28 HRC

Applications S45C is widely used for all industrial applications requiring more wear resistance and strength. Typical applications of S45C 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

More Information on Fabrication and Heat Treatment: Machining S45C steel has good machinability in normalized as well as the hot rolled condition. Based on the recommendations given by the machine manufacturers, operations like tapping, milling, broaching, drilling, turning and sawing etc. can be carried out on S45C steel using suitable feeds, tool type and speeds. Welding

Certain facts about welding of S45C steel are:  S45C steel is readily welded when correct procedure is followed.  Welding S45C steel in through-hardened, tempered and flame or induction hardened condition is not recommended.  Low hydrogen electrodes are preferred for welding S45C steel.  The workpiece is  Pre-heated at 200°C–300°C (392°F – 572°F)  Maintained at the same temperature during welding  Cooled slowly using sand, ashes etc and  Stress relieved at 550°C – 660°C (1022°F – 1220°F). Heat Treatment S45C is subjected to the following processes:  Forging  Annealing  Normalizing  Stress relieving  Hardening  Tempering Forging  Heat to 850°C – 1250°C (1562°F – 2282°F)  Hold until the temperature is uniform  Cool in furnace Annealing  Heat to 800°C – 850°C (1472°F – 1562°F)  Hold until the temperature is uniform  Cool in 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 Hardening  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