Recently a series of Aerospace Material Specs have been revised. These updated AMS Titanium Specifications all reflect a major review of these documents by the SAE AMS G Committee on Titanium and Refractory Metals. We’ll review some of the issues the committee addressed in these new updates. Then we’ll list the specifications affected.
Many of these specs have been affected by an update to restrict material to the sizes of the mechanical property tables. For some, vacuum is now required in the first consumable electrode melt. And agreement on mechanical property values on material outside specifications ranges is added. The report paragraph in many of these specs has also been revised. For some, the hydrogen content in a specific table has been revised to match that of AMS-4965. Or the hydrogen sample mass has been aligned with ASTM-E1447. And reference to AS-6279 is added as well.
As the committee reviewed each spec to see if any of the above affected the content, other areas of concern were found. So some of the items above may not be applicable, but other updates were made. You will likely see change bars in the margin of the spec you use to identify the revisions. In certain cases, the change bars from the previous edition are maintained where the previous correction is of particular note.
Here are the AMS Titanium specifications that have been updated so far this year:
- AMS 4898, Revision D, Titanium Alloy, Sheet, 6Al – 2Sn – 2Zr – 2Mo – 2Cr – 0.15Si, Annealed
- AMS 4905, Revision E, Titanium Alloy, Damage-Tolerant Grade Plate, 6Al – 4V, Beta Annealed
- AMS 4911, Revision N, Titanium Alloy, Sheet, Strip, and Plate, 6Al – 4V, Annealed
- AMS 4914, Revision F, Titanium Alloy Cold Rolled Sheet and Strip, 15V – 3Al – 3Cr – 3Sn, Solution Heat Treated
- AMS 4928, Revision U, Titanium Alloy Bars, Wire, Forgings, Rings, and Drawn Shapes, 6Al – 4V, Annealed
- AMS 4935, Revision K, Titanium Alloy Extrusions and Flash Welded Rings, 6Al – 4V, Annealed, Beta Processed
- AMS 4945, Revision F, Titanium Alloy Tubing, Seamless, Hydraulic, 3Al – 2.5V, Controlled Contractile Strain Ratio, Cold Worked, Stress Relieved
- AMS 4946, Revision D, Titanium Alloy Tubing, Seamless, Hydraulic, 3Al – 2.5V, Texture Controlled, Cold Worked, Stress Relieved
- AMS 4965, Revision L, Titanium Alloy, Bars, Wire, Forgings, and Rings, 6.0AI – 4.0V, Solution Heat Treated and Aged
- AMS 4971, Revision K, Titanium Alloy, Bars, Wire, Forgings, and Rings, 6Al – 6V – 2Sn, Annealed, Heat Treatable
- AMS 4975, Revision M, Titanium Alloy, Bars, Wire, and Rings, 6.0Al – 2.0Sn – 4.0Zr – 2.0Mo – 0.08Si, Solution and Precipitation Heat Treated
- AMS 4976, Revision J, Titanium Alloy, Forgings, 6.0Al – 2.0Sn – 4.0Zr – 2.0Mo, Solution and Precipitation Heat Treated
- AMS 4978, Revision G, Titanium Alloy Bars, Wire, Forgings, and Rings, 6Al – 6V – 2Sn, Annealed
- AMS 4979, Revision H, Titanium Alloy, Bars, Wire, Forgings, and Rings, 6Al – 6V – 2Sn, Solution and Precipitation Heat Treated
- AMS 4981, Revision G, Titanium Alloy Bars, Wire, and Forgings, 6.0Al – 2.0Sn – 4.0Zr – 6.0Mo, Solution and Precipitation Heat Treated
- AMS 4985, Revision E, Titanium Alloy, Investment Castings 6Al – 4V 130 UTS, 120 YS, 6% EL Hot Isostatically Pressed Anneal Optional or When Specified
- AMS 4988, Revision C, Titanium Alloy Sheet, Strip, and Plate, 6Al – 6V – 2Sn, Solution Heat Treated
- AMS 4991, Revision E, Titanium Alloy Castings, Investment 6Al – 4V Hot Isostatic Pressed, Anneal Optional
- AMS 4992, Revision B, Castings, Structural Investment, Titanium Alloy 6Al – 4V Hot Isostatically Pressed
- AMS 6905, Revision B, Titanium Alloy Bars, Forgings and Forging Stock, 6.0Al – 2.0Sn – 4.0Zr – 2.0Mo, Duplex Annealed
- AMS 6930, Revision E, Titanium Alloy Bars, Forgings and Forging Stock, 6.0Al – 4.0V, Solution Heat Treated and Aged
- AMS 6931, Revision C, Titanium Alloy Bars, Forgings and Forging Stock, 6.0Al – 4.0V, Annealed
- AMS 6945, Revision B, Titanium Alloy, Single Melt, Sheet, Strip, and Plate 6Al – 4V Annealed
- AMS 6946, Revision C, Titanium Alloy, Sheet, Strip, and Plate 4Al – 2.5V – 1.5Fe, Annealed
And more AMS Titanium specifications are currently in the process of being updated as well! As a comparison, the total Titanium specs updated by the committee last year was 20. We’ve got 24 new documents and we’re not even half-way through the year yet!
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