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SEAMLESS AIRCRAFT ALLOY TUBING

Seamless Aircraft Alloy Tubing - 21615 MIL-T-6736B

Cold Drawn Seamless Aircraft Alloy Tubing is produced by the Carbon & Alloy Tube Group of Plymouth Tube Co. in grade 4130 at two of our facilities: Streator, IL and Cold Draw at Winamac, IN. Special shapes may be produced upon request, including Square OD & ID, shaped OD with Round ID, Triangular OD & ID, tear drop shape, and spline tubing. Mil-T-6736B 4130 Size Range: OD:

Special Shape OD / ID combinations available.

0.090” – 5.563”

(2.286 mm – 141.3 mm) Wall:

0.020” – 0.750”

(0.508 mm – 19.05 mm)

Types: I - Round II - Rectangular or Square Physical Conditions:(A) Soft Anneal (N) StressRelieved (HT-125) Larger OD’s only (HT-150) Larger OD’s only

125,000 psi min tensile achieved by means of cold working only on smaller OD’s

Mechanical Properties Condition and wall thickness

Tensile strength (min.) (Min.) Ext. under load Full tube (min.)
Yield strength at 0.2 % offset or at extension indicatedElongation in 2” Inch psi psi Inches in 2” Percent (A) 95,000 max. (N) Up to 0.035 incl. 95,000 75,000 0.0090 10 Over 0.035 to 0.187 incl. 95,000 75,000 .0090 12 Over 0.187 95,000 70,000 .0087 15 (HT-125) All Walls 125,000 100,000 .0107 12 (HT-150) All Walls 150,000 135,000 .0130 10
From MIL-T-6736B Table II.

Tolerances (variations in dimensions of Type I seamless tubing)

OD Tolerance Annealed, Normalized, or Stress RelievedQuenched & Tempered Wall Tolerance Annealed, Normalized, or Stress Relieved Specified OD Inches Specified ID Inches Up to 0.5, incl. +/- 0.005” +/- 0.010” Up to 0.5. +/- 15% Over 0.5 to 1.5, incl. +/- 0.005” +/- 0.015” 0.5 and over +/- 10% Over 1.5 to 3.0, incl. +/- 0.010” +/- 0.030”
From AMS 2253E 3.1.1, 3.1.2. Over 3.0 to 5.5, incl. +/- 0.015” +/- 0.045” Over 5.5 +/- 0.020” +/- 0.060”
From AMS 2253E Tolerances Table I. ? Tubes with wall thickness less than 3% of the nominal OD will be allowed an ovality tolerance over and under equal to 0.5% of the nominal OD in addition to the tolerance indicated above, but the mean OD shall be within the individual measurement tolerances specified above. Note: Commercial packaging and preservation applies on MIL-T-6736B
DS4130-022400 Copyright © 1999, Plymouth Tube Co. Phone:

1-800-323-9506

29W150 Warrenville Rd. ? Warrenville, IL 60555 USA Visit us online at Fax: 1-630-393-3551 Email: carbon_alloy@plymouth.com

http://www.plymouth.com