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SPECIFICATION FOR TITANIUM AND TITANIUM
ALLOY WELDING ELECTRODES AND RODS
SFA-5.
(Identical with AWS Specification A 5.16-90)
1. Scope
This specification prescribes requirements for the classification of titanium and titanium alloy electrodes and rods for gas tungsten arc, gas metal arc, and plasma arc welding.
PART A — GENERAL REQUIREMENTS
2. Classification
2.1 The welding materials covered by this specifica- tion are classified according to chemical composition of the filler metal, as specified in Table 1.
2.2 Materials classified under one classification shall not be classified under any other classification of this specification, except that ERTi-1 may be classified also as ERTi-2.
2.3 The filler metals classified under this specification are intended for gas tungsten arc, gas metal arc, and plasma arc welding processes, but that is not to prohibit their use with any other process for which they are found suitable.
3. Acceptance
Acceptance^1 of the material shall be in accordance with the provisions of ANSI /AWS A5.01, Filler Metal Procurement Guidelines.^2
(^1) See Section A3 (in the Appendix) for further information concerning acceptance, testing of the material shipped, and A5.01, Filler Metal Procurement Guidelines. (^2) AWS standards can be obtained from the American Welding Society, 550 N.W. LeJeune Road, P.O. Box 351040, Miami, Florida 33135.
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4. Certification By affixing the AWS specification and classification designations to the packaging, or the classification to the product, the manufacturer certifies that the product meets the requirements of this specification.^3 5. Units of Measure and Rounding-Off Procedure 5.1 U.S. Customary Units are the standard units of measure in this specification. The SI Units are given as equivalent values to the U. S. Customary Units. The standard sizes and dimensions in the two systems are not identical, and for this reason, conversion from a standard size or dimension in one system will not always coincide with a standard size or dimension in the other. Suitable conversions, encompassing standard sizes of both, can be made, however, if appropriate tolerances are applied in each case.
5.2 For the purpose of determining conformance with this specification, an observed or calculated value shall be rounded to the “nearest unit” in the last right-hand place of figures used in expressing the limiting value in accordance with the rounding-off method given in ANSI /AWS A1.1, Metric Practice Guide for the Weld- ing Industry.
(^3) See A4 (in the Appendix) for further information concerning certifi- cation and the testing specified to meet this requirement.
SFA-5.16 1998 SECTION II
TABLE 1
CHEMICAL COMPOSITION REQUIREMENTS FOR TITANIUM AND TITANIUM ALLOY ELECTRODES AND RODS
AWS Classification
Weight Percent
(1) (2) (3) (4)
Other
UNS
1990
1970
Number
(5)
Carbon
Oxygen
Hydrogen
Nitrogen
Aluminum
Vanadium
Tin
Iron
Element
Amount
ERTi-
ERTi-
R
... ... ...
... ...
ERTi-
ERTi-
R
... ... ...
... ...
ERTi-
ERTi-
R
0.10–0.
... ... ...
... ...
ERTi-
ERTi-
R
0.15–0.
... ... ...
... ...
ERTi-
ERTi-6Al-4V
R
5.5–6.
3.5–4.
...
Yttrium
ERTi-5ELI
ERTi-6Al-4V-
R
5.5–6.
3.5–4.
...
Yttrium
ERTi-
ERTi-5Al-2.5Sn
R
4.5–5.
...
2.0–3.
Yttrium
ERTi-6ELI
ERTi-5Al-2.5Sn-
R
4.5–5.
...
2.0–3.
Yttrium
ERTi-
ERTi-0.2Pd
R
... ... ...
Palladium
0.12/0.
ERTi-
ERTi-3Al-2.5V
R
2.5–3.
2.0–3.
...
Yttrium
ERTi-9ELI
ERTi-3Al-2.5V-
R
2.5–3.
2.0–3.
...
Yttrium
ERTi-
R
... ... ...
Molybdenum
0.2/0.
Nickel
0.6/0.
ERTi-
ERTi-6Al-2Cb-1Ta-1Mo
R
5.5–6.
... ...
Molybdenum
0.5/1.
Columbium
1.5/2.
Tantalum
0.5/1.
NOTES:(1) Titanium constitutes the remainder of the composition.(2) Single values are maximum.(3) Analysis of the interstitial elements C, O, H and N shall be conducted on samples of filler metal taken after the filler metal has been reduced to its final diameter and all processing
operations have been completed. Analysis of the other elements may be conducted on these same samples or it may have been conducted on samples taken from the ingot or the rod stockfrom which the filler metal is made. In case of dispute, samples from the finished filler metal shall be the referee method. (4) Residual elements, total, shall not exceed 0.20 percent, with no single such element exceeding 0.05 percent. Residual elements need not be reported unless a report is specifically required
by the purchaser. Residual elements are those elements (other than titanium) that are not listed in Table 1 for the particular classification, but which are inherent in the raw material orthe manufacturing practice. Residual elements can be present only in trace amounts and they cannot be elements that have been intentionally added to the product. (5) SAE/ASTM Unified Numbering Systems for Metals and Alloys.
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SFA-5.16 1998 SECTION II
TABLE 2 STANDARD SIZES (1)
Diameter Tolerance Standard Package Form in. mm in. mm (^1) ⁄ 16 (0.062) (^) 1.
Straight lengths,(2)^5 ⁄^64 (0.078) 2. coils with support, 3 ⁄^32 (0.094) 2. coils without 1 ⁄^8 (0.125) 3.2^6 0.002^6 0. support 5 ⁄^32 (0.156) 4. (^3) ⁄ 16 (0.187) (^) 4.
0.020 (^) 0. 0.030 (^) 0.8 +0.001 +0. Spools 0.035 0.9 −0.002 −0. 0.045 (^) 1. (^1) ⁄ 16 (0.062) (^) 1.6 6 0.002 6 0.
NOTES: (1) Dimensions, sizes, tolerances, and package forms other than these shall be as agreed to by the purchaser and the supplier. (2) Length shall be 36 in. 6 1 ⁄ 4 in. (915 mm 6 6 mm).
TABLE 3 STANDARD PACKAGE DIMENSIONS AND WEIGHTS
Diameter Filler Metal Net Weight Size(1)^ of Package (1) (2)^ Width(3)^ Inside(4)^ Outside in. mm lb. kg in. mm in. mm in. mm
Straight Lengths
(^1) ⁄ 16 1.6 10 4................... through through 50 23 (^3) ⁄ 16 4.
Coils With Support and Coils Without Support
(^1) ⁄ 16 1.6 25 11 2 1 ⁄ 2 65...... 13 5 ⁄ 8 345 through through...... or or 12 6 1 ⁄ 8 305 6 3 151 ⁄ 8... (^3) ⁄ 16 4.8 50 23 45 ⁄ 8 120......... 400 60 27 45 ⁄ 8 120... 17 1 ⁄ 2 420
... 430
Spools
0.020 0.5 1 0.5 See Fig. 1...... See Fig. 1 through through 5 2.2 See Fig. 2...... See Fig. 2 (^1) ⁄ 16 1.6 15 6.8 See Fig. 2...... See Fig. 2
NOTES: (1) Sizes, dimensions, and weights other than these shall be as agreed to by the purchaser and the supplier. (2) Actual net weight of the filler metal in each package shall be within 10 percent of the standard net weight shown. (3) Width of coils and spools. (4) Inside diameter of the liner for coils with support, and of the coil itself, for coils without support.
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PART C — SPECIFICATIONS FOR WELDING RODS, ELECTRODES, AND FILLER METALS SFA-5.
FIG. 1 DIMENSIONS OF 4 IN. (100 MM) SPOOL
FIG. 2 DIMENSIONS OF 8 AND 12 IN. (200 AND 300 MM) SPOOLS
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PART C — SPECIFICATIONS FOR WELDING RODS, ELECTRODES, AND FILLER METALS SFA-5.
Appendix
Guide to AWS Specification for Titanium and Titanium
Alloy Welding Electrodes and Rods
(This Appendix is not a part of ANSI /AWS A5.16-90, Specification for Titanium and Titanium Alloy Welding Electrodes and Rods , but is included for information purposes only.)
A1. Introduction
The purpose of this guide is to correlate the filler metal classifications with their intended applications so the specification can be used effectively. Reference to appropriate base metal specifications is made whenever that can be done and when it would be helpful. Such references are intended only as examples rather than complete listings of the materials for which each filler metal is suitable.
A2. Classification
A2.1 The system for identifying the filler metal classifications in this specification follows the standard pattern used in other AWS filler metal specifications. The letter “E” at the beginning of each classification designation stands for electrode, and the letter “R” stands for welding rod. Since these filler metals are used as electrodes in gas metal arc welding and as rods in gas tungsten arc welding, both letters are used.
A2.2 The chemical symbol“Ti” appears after “R” as a means of identifying the filler metals as unalloyed titanium or a titanium-base alloy. The numeral provides a means of identifying different variations in the compo- sition. The filler letters “ELI” designate titanium alloy filler metals with extra low content of interstitial ele- ments (carbon, oxygen, hydrogen, and nitrogen).
A2.3 Designations for individual alloys in this revi- sion of the specification are different from those used in earlier documents. With the exception of ERTi-15, specific alloys now are identified by a number similar
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to the grade designation used in ASTM /ASME^5 specifi- cations for corresponding base metals. In the absence of a grade number in general usage for the Ti-6Al- 2Cb-1Ta-1Mo alloy, the number 15 was assigned arbi- trarily to designate this classification of filler metal. See Tables 1 and A1 for cross reference with the earlier designations. A2.4 Tables 1 and A1 provide a correlation of the classifications in this revision with those in the previous (1970) revision and with other specifications for titanium alloy filler metals. The Aerospace Materials...ASTM /ASME Specifications listed are also widely used in industry. Table A1 presents a general correlation of the filler metals in these other specifica- tions with those in this AWS specification.
A3. Acceptance Acceptance of all welding materials classified under this specification is in accordance with ANSI /AWS A5.01, Filler Metal Procurement Guidelines , as the Specification states. Any testing a purchaser requires of the supplier, for material shipped in accordance with this specification, needs to be clearly stated in the purchase order, according to the provisions of ANSI /AWS A5.01. In the absence of any such statement in the purchase order, the supplier may ship the material with whatever testing the supplier normally conducts on material of that classification, as specified in Schedule F, Table 1, of the Filler Metal Procurement Guidelines.
(^5) American Society of Mechanical Engineers, Three Park Avenue, New York, New York 10016-5990.
SFA-5.16 1998 SECTION II
TABLE A SPECIFICATION CROSS INDEX (1)
Filler Metal Base Metal AWS Aerospace Classification Materials Military Specification Specification ASTM/ASME 1990 1970 (AMS) (MIL) Grades
ERTi-1 ERTi-1 4951 MIL-R-81558 1 ERTi-2 ERTi-2... MIL-R-81558 2 ERTi-3 ERTi-3... MIL-R-81558 3 ERTi-4 ERTi-4... MIL-R-81558 4 ERTi-5 ERTi-6Al-4V 4954... 5 ERTi-5ELI ERTi-6Al-4V-1 4956 MIL-R-... ERTi-6 ERTi-5Al-2.5Sn 4953... 6 ERTi-6ELI ERTi-5Al-2.5Sn-1... MIL-R-... ERTi-7 ERTi-0.2 Pd...... 7 ERTi-9 ERTi-3Al-2.5V...... 9 ERTi-9ELI ERTi-3Al-2.5V-......... ERTi-12 ERTi-0.8Ni-0.3Mo...... 12 ERTi-15 ERTi-6Al-2Cb-1Ta-1Mo... MIL-R-...
NOTE: (1) Specifications are not exact duplicates. Information is supplied only for general comparison.
Testing in accordance with any other Schedule in that Table shall be specifically required by the purchase order. In such cases, acceptance of the material shipped shall be in accordance with those requirements.
A4. Certification
The act of placing the AWS specification and classi- fication designations on the packaging enclosing the product or the classification on the product itself, consti- tutes the supplier’s (manufacturer’s) certification that the product meets all of the requirements of the specifi- cation. The only testing requirement implicit in this certifica- tion is that the manufacturer has actually conducted the test required by the specification on material that is representative of that being shipped and that the material met the requirements of the specification. Rep- resentative material, in this case, is any production run of that classification using the same formulation. “Certification” is not to be construed to mean that tests of any kind were necessarily conducted on samples of the specific material shipped. Tests on such material may or may not have been conducted. The basis for the certification required by the specification is the classification test of “representative material” cited above, and the “Manufacturer’s Quality Assurance Pro- gram” in ANSI /AWS A5.01.
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A5. Ventilation During Welding A5.1 Five major factors govern the quantity of fumes to which welders and welding operators are exposed during welding: (a) Dimensions of the space in which welding is done (with special regard to the height of the ceiling); (b) Number of welders and welding operators work- ing in that space; (c) Rate of evolution of fumes, gases, or dust, ac- cording to the materials and processes used; (d) The proximity of the welders or welding operators to the fumes as the fumes issue from the welding zone, and to the gases and dusts in the space in which they are working; (e) The ventilation provided to the space in which the welding is done. A5.2 American National Standard Z49.1, Safety in Welding and Cutting (published by the American Weld- ing Society), discusses the ventilation that is required during welding and should be referred to for details. Attention is drawn particularly to the section of that document, entitled “Health Protection and Ventilation.”
A6. Welding Considerations A6.1 Titanium and titanium alloys can be welded by gas tungsten arc, gas metal arc, plasma arc and
SFA-5.16 1998 SECTION II
A7.9 ERTi-12. Welds made with this filler metal offer improved corrosion resistance, especially to crevice corrosion in hot brines, and higher strength levels compared to similar welds made using ERTi-2 elec- trodes and rods. Uses in industrial applications are similar to those of ERTi-2 electrodes and rods, but can be extended to less oxidizing conditions
A7.10 ERTi-15. Welds made with ERTi-15 elec- trodes and rods have excellent resistance to salt water corrosion combined with good toughness and moderate strength. Typical uses are the fabrication of submersible
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hulls, pressure vessels, etc., using base material of a matching composition
A8. Special Tests It is recognized that for certain applications, supple- mentary tests may be required. In such cases, additional tests to determine specific properties, such as corrosion- resistance, scale-resistance, or strength at elevated tem- peratures may be required. ANSI /AWS A5.01, Filler Metal Procurement Guidelines, provides a means by which such tests can be incorporated into the pur- chase order.
