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1045 Hot Rolled:

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Disclaimer: The content of this page is for general information only and is not to be used for engineering or design. The content of this material specification page was compiled from available public sources and authorities on material properties. Although we believe the information to be corrrect, Metal Stock, Inc. is not responsible for the accuracy of any of the material specifications and only presents this data as general information for our customers.

1045 hot rolled is a silicon killed medium carbon steel. Higher carbon content imparts increased strength over low carbon steels, such as 1018. Response to heat treatment is excellent, and the resultant mechanical properties can be obtained to permit wide usage in the production of machinery parts and shafts. 1045 can be hammer forged; machinability is good, but forming and welding qualities are limited.

 

General Information about Hot Rolled 1045:


APPLICATIONS:

1045 hot rolled has a wide variety of applications. It is used for machinery parts, die forging, hot upsetting, gears, crankshafts, shafts, axles, bolts, studs, pinions, etc. It can be hammer forged. 1045 can be used where greater strength is required than can be obtained from the lower carbon steels. It responds to heat treatment, and a wide range of properties can be obtained. When higher dimensional accuracy and straightness in the productions of shafts are required, 1045 Turned, Ground and Polished Precision Shafting is recommended.

MACHINING AND WELDING:

1045 hot rolled's machinability is rated at 64% of B1112. Average cutting speed is 95-120 ft/min. 1045 is not readily welded due to its higher carbon content. On thin sections, arc or gas welding can be used without preheating, but in welds and joints on thicker sections, preheating is necessary. Stress relieving after welding is also recommended.

HEAT TREATING - Forging, Normalizing, and Annealing:

1045 hot rolled is a water or oil quenched metal. The recommended quenching temperatures are 1550°F for water and 1575°F for oil. A wide range of mechanical properties can be obtained by tempering at different temperatures between 700F. and 1300°F. Tempering below 700°F should be avoided. 1045 can be flame or induction hardened, but is not recommended for carburizing or cyaniding treatments.



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