HOT ROLLED ROUNDS AND SQUARES |
HOT ROLLED FLAT BAR |
MILL EDGE HOT ROLLED STRIP |
COLD FINISHED FLAT BAR |
COLD FINISHED ROUND BAR |
CARBON BAR PRODUCTS SELECTION
GUIDE
Selection Guide
Hot rolled
Merchant Bar Quality
Only a minimum discard is made from each ingot, but bars should
be free from visible piping. Seams and other surface irregularities may be
present. Chemistry is subject to ladle analysis only. Easily
machined, welded, and formed but not particularly recommended for forging, heat
treating or complicated machining operations. Conforms to ASTM A575 and
QQ-S-630.
Low Carbon
M1010 — Low carbon, general purpose merchant quality
steel featuring economy plus formability and weldability.
M1020 — A low carbon, general purpose, merchant quality
steel, produced to wider carbon and manganese ranges than standard steels.
Suitable for forming and welding.
Medium Carbon
M1044 — merchant quality steel is similar to AISI 1045.
Because it contains lesser amounts of manganese (.25/.60), strength and
responsiveness to heat treatment are slightly lower.
ASTM A36 — Bars designed for use in structural
applications. Minimum physical properties of 36,000 psi yield strength and
58,000 psi tensile strength
COLD FINISHED
1018—A
low carbon steel with a medium manganese content. Has good hardening
properties, fair machinability and is excellent for cold bending and forming
operations. Readily brazed and welded. Suitable for shafting and for
applications that do not require the greater strength of high carbon and alloy
steels. Conforms to ASTM A-108 and AMS 5069. (Not applicable to bars under
2-15/16” and sizes lighter than 29.34 lbs. per foot.)
1045—Is
a higher carbon content imparts increased strength to the steel. Response to
heat treatment is excellent and the resulting mechanical properties which can be
obtained permit a wide usage in the production of machinery parts and shafts.
Conforms to ASTM A-108.
1144—Is
a medium carbon, resulfurized, free cutting steel that responds well to heat
treatment. The relatively high carbon, high manganese content provides a steel
with good strength and wear resistance. It is often used for induction hardened
parts, and screw machine applications. Conforms to ASTM A-108.
12L14—Is
the most widely used steel for screw machine parts applications. Improved
machinability is obtained by the addition of lead which acts as an internal
lubricant allowing increased machining speeds and prolonging cutting tool life.
Conforms to ASTM A-108.
GROUND & POLISHED SHAFTING
Extreme size accuracy, straightness and concentricity to minimize
wear in high-speed applications. Turned, ground & polished bars can be
machined unsymmetrically, as in key-seating, with minimum distortion because
cold drawing strains are not developed. Drawn, ground & polished bars
combine the strength advantages of cold drawn stock with extra accuracy and
lustrous finish. Conforms to ASTM A-108 and QQ-S-637.
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