High Strength Steels

Mirraloy® TGP (4140/4150 Mod)

Turned Ground & Polished, Alloy Shaft

Mirraloy is a modified 4140/4150 steel, turned ground and polished shaft. Typical hardness is 269/341 BHN. This chromium and molybdenum based alloy is electric furnace melt, vacuum degassed, stress relieved, and machine straightened. It is offered in the turned ground and polished condition; with a “near” bearing-fit precision tolerance. Surface finish is approximately RMS 12/15. Typical tensile strength is 156,000 PSI. Call or email us for a quote.

Mirraloy is an excellent option for machined parts, steel shafts, and steel rods requiring higher resistance to toughness, flex, torque and general wear.

Consideration should be given to use Mirraloy in place of certain commercial alloy and carbon steel grades including: AISI 1018, 1045, 4140 and 4150 depending upon the requirement.

In addition to meeting the requirements set forth by AISI and SAE standards, Associated Steel offers some of the tightest chemical and mechanical restrictions when producing its shafting material.

 

Features

Heat Treated

Turned Ground & Polished

Machine Straightened

Stress Relieved

Clean Steel Technology

Electric Furnace Melt

Vacuum Degassed

Fine Grain Structure

Weldable

Typical Properties*

Hardness269/341 BHN
Tensile156,000 P.S.I.
Yield 123,500 P.S.I.
Elongation in 2%17%
Reduction of Area55%

*Based on 1/2″ test piece

Available Sizes*

Rounds

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″

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″

2-7/8″

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″

4-1/4″

4-3/8″

4-7/16″

4-1/2″

4-3/4″

4-15/16″

5″

5-1/4″

5-7/16″

5-1/2″

5-15/16″

6″

6-1/2″

7″

8″

Metric Rounds
4mm

5mm

6mm

7mm

8mm

9mm

10mm

11mm

12mm

13mm

14mm

15mm

16mm

17mm

18mm

19mm

20mm

21mm

22mm

23mm

24mm

25mm

26mm

27mm

28mm

30mm

32mm

35mm

36mm

38mm

40mm

45mm

50mm

55mm

60mm

65mm

70mm

80mm

90mm

100mm

.

Available Lengths

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

*Small diameter shafts may have modified analysis and/or variations in thermal treatment.

sPACKING

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″)
Over 4″ to 7″ Round(+.000″/-.004″)
Over 7″ Round and AboveCall for Details
Up to 38MM Round(+.000″/-.001″)
Over 38MM to 80MM Round(+.000″/-.002″)
Over 80MM to 100MM Round(+.000″/-.003″)
Over 100MM RoundCall for Details

Applications

  • Arbors
  • Bolts
  • Crank Shafts
  • Drive Shafts
  • Drag Line Parts
  • Feed Screws
  • Gears
  • Hoist Shafts
  • Hubs
  • Journals
  • King Bolts
  • Lead Screws
  • Line Shafts
  • Mandrels
  • Pinions
  • Rings
  • Stub Shafts
  • Tie Rods
  • Worm Gears
  • Wrist Pins

Boxing is recommended to protect during shipment.

(Equivalent to Sheffield#20)

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