Skip to content

Mirraloy® FM TGP (1144 Mod)

1144 Mod Free Machining, TGP Shaft

Mirraloy FM is a modified 1144 steel.  It is a high strength micro-alloyed, free machining carbon steel with a typical hardness of 260 BHN and typical tensile strength of 133,000 PSI. This material offers a high degree of machinability, like a carbon steel, and has the strength consistent with an alloy steel. It does not exhibit hard and/or soft spots like what is seen in most carbon steels. It is designed for ease of machining with high speed automatic equipment, such as screw machinery.

Mirraloy FM exhibits up to 50% more strength than that of an AISI 1018 carbon steel. Its high sulfur content gives this grade a machinability rating of 83% as compared to 1212 steel;  welding is not recommended. It is an excellent choice for machined parts requiring better tensile strength and wear resistance than AISI 1045 or 1018. This is a “near” bearing-fit shaft with a precision finish of approximately RMS 15.

Features

Hardness260 BHN
Tensile 133,000 P.S.I.
Yield 110,000 P.S.I.
Elongation in 2″ 8% min.
Machinability 83% of 1212

*Based on 1/2″ test piece

  • 1/4″
  • 5/16″
  • 3/8″
  • 7/16″
  • 1/2″
  • 9/16″
  • 5/8″
  • 11/16″
  • 3/4″
  • 13/16″
  • 7/8″
  • 15/16″
  • 1″
  • 1-1/16″
  • 1-1/8″
  • 1-3/16″
  • 1-1/4″
  • 1-5/16″
  • 1-3/8″
  • 1-7/16″
  • 1-1/2″
  • 1-9/16″
  • 1-5/8″
  • 1-11/16″
  • 1-3/4″
  • 1-13/16″
  • 1-7/8″
  • 1-15/16″
  • 2-1/16″
  • 2-1/4″
  • 2-5/16″
  • 2-3/8″
  • 2-7/16″
  • 2-1/2″
  • 2-9/16″
  • 2-5/8″
  • 2-11/16″
  • 2-3/4″
  • 2-13/16″
  • 2-7/8″
  • 2-15/16″
  • 3″
  • 3-1/16″
  • 3-1/4″
  • 3-5/16″
  • 3-3/8″
  • 3-7/16″
  • 3-1/2″
  • 3-9/16″
  • 3-5/8″
  • 3-11/16″
  • 3-3/4″
  • 3-7/8″
  • 3-15/16″
  • 4″

Lengths

10/12 Ft. R/L, 20/24 Ft. R/L and Custom Cuts

Strength Comparison Chart

Mirraloy FMC1045C1018
Tensile Strength133,000 PSI91,000 PSI70,000 PSI
Yield Strength110,000 PSI77,000 PSI50,000 PSI

Typical Diameter Tolerances

1/4” to 1-1/2” Round(+.000”/-.001”)
Over 1-1/2” to 3” Round(+.000”/-.002”)
Over 3” to 4” Round(+.000”/-.003”)

Boxing is recommended to protect during shipment.

Applications

Consider Mirraloy® FM TGP

Back To Top