1、AEROSPACE STANDARDMA2060 REV.AIssued 1982-11Revised 1993-07Reaffirmed 2004-07Superseding MA2060Fittings, Welded, Hydraulic, Titanium and Corrosion Resistant Steel, 21 000 kPa, Metric1. SCOPE:This aerospace specification defines the requirements for metric weld fittings and machine weldments using an
2、 orbiting welding head suitable for use on cold worked 3A1-2.5V titanium and 21Cr-6Ni-9Mn CRES tubing and associated fittings.This specification is equivalent to AS1576 except for metric dimensions and standards.2. REFERENCES:2.1 Applicable Documents:The following specifications and standards, of th
3、e issue in effect on the date of invitation for bids or request for proposal, form a part of this specification to the extent specified herein:2.1.1 SAE Publications: Available from SAE, 400 Commonwealth Drive, Warrendale, PA 15096-0001.AMS 4928 Bars and Forgings, Ti-6A1-4V, AnnealedAMS 4944 Titaniu
4、m Alloy Tubing, Seamless, Hydraulic 3A1-2.5V Cold Worked, Stress RelievedAMS 5561 Tubing, Hydraulic, Welded and Drawn, Corrosion Resistant, 21Cr-6Ni-9Mn, High Pressure, HydraulicAMS 5656 Steel Bars, Forging and Rings, Corrosion Resistant 9Mn-20Cr-.5NiAMS 5659 Bars, Forgings and Rings, 15Cr-5Ni-0.03
5、(Cb + Ta) 4Cu, Con. Elect. MeltedMA2002 Impulse Testing of Hydraulic Hose Assemblies, Tubing and Fittings (ISO 6772)MA2003 Rotary Flexure Testing of Hydraulic Tubing Joints and Fittings (ISO 7527)MA2005 Tube Fittings, Metric, Aerospace Fluid Systems, Separable - General Specification for (ISO 7169)M
6、A2014 Fitting End, Fluid, Acorn, Standard Dimensions, for Metric (ISO 7321)MA2040 Nut, Coupling, FlarelessMA2061 Fitting End, Welded Dimensions, Hydraulic 20 000 kPa, MetricSAE Technical Standards Board Rules provide that: “This report is published by SAE to advance the state of technical and engine
7、ering sciences. The use of this report is entirely voluntary, and its applicability and suitability for any particular use, including any patent infringement arising therefrom, is the sole responsibility of the user.” SAE reviews each technical report at least every five years at which time it may b
8、e reaffirmed, revised, or cancelled. SAE invites your written comments and suggestions. Copyright 2004 SAE International All rights reserved. No part of this publication may be reproduced, stored in a retrieval system or transmitted, in any form or by any means, electronic, mechanical, photocopying,
9、 recording, or otherwise, without the prior written permission of SAE. TO PLACE A DOCUMENT ORDER: Tel: 877-606-7323 (inside USA and Canada) Tel: 724-776-4970 (outside USA) Fax: 724-776-0790 Email: custsvcsae.org SAE WEB ADDRESS: http:/www.sae.org SAE MA2060 Revision A- 2 -2.1.1 (Continued):MA2062 T-
10、Ring, Tube Weld, Hydraulic 20 000 kPa, MetricMA2063 Tube and Fitting End, Welded, Preparation and Installation, 20 000 kPa, MetricMA2064 Sleeve, Tube Weld to Flareless Female, Hydraulic, 20 000 kPa, MetricMA2065 Union, Tube Weld to Flareless Male, Hydraulic, 20 000 kPa, MetricMA2066 Reducer, Tube We
11、ld, Hydraulic, 20 000 kPa, MetricMA2069 Elbow, 90 Tube Weld, Hydraulic, 20 000 kPa, MetricMA2070 Tee, Tube Weld, Hydraulic, 20 000 kPa, MetricMA2071 Cross, Tube Weld, 20 000 kPa, Hydraulic, 20 000 kPa, MetricMA2095 Fitting End, 24 Cone2.1.2 U.S. Government Publications: Available from Standardizatio
12、n Documents Order Desk, Building 4D, 700 Robbins Avenue, Philadelphia, PA 19111-5094.MIL-STD-105 Sampling Procedures and Tables for Inspection by AttributesMIL-STD-109 Quality Assurance Terms and DefinitionsMIL-STD-129 Marking for Shipment and StorageMIL-H-6875 Heat Treatment of Steels, Process for
13、MIL-STD-6866 Inspection, Penetrant Method of2.1.3 ANSI Publications: Available from American National Standards Institute, 1430 Broadway, New York, NY 10018.ANSI/AWS A3.0 Welding Terms and DefinitionsANSI B46.1 Surface Texture, Surface Roughness, Waviness, and Lay3. TECHNICAL REQUIREMENTS:3.1 Qualif
14、ication:Fittings furnished under this specification shall be products which have been subjected to and which have successfully passed the test requirements of this specification.3.2 Materials:3.2.1 Fitting Materials: Fittings and other parts shall be made of materials listed in Table 1.SAE MA2060 Re
15、vision A- 3 -3.2.2 Fitting Forgings:TABLE 1 - Materials3.2.2.1 Surface Defects: Forged fittings shall be free from cracks, laps, seams, and other defects.NOTE: Surface defects may be removed as long as wall thickness requirements are met and as long as defects do not reappear after etching and in pe
16、netrant inspection.3.2.2.2 Titanium Forgings: Titanium forgings shall exhibit an equiaxed microstructure. Oxide or other gas contaminated surface scale shall be removed by pickling.3.2.3 Tubing Material: Tubing shall be in accordance with the requirements of AMS 4944 and AMS 5561 as applicable.3.3 D
17、esign and Fabrication:Fittings and other parts shall be in accordance with the following standards, as applicable:a. MA2061b. MA2062c. MA2063d. MA2064e. MA2065f. MA2066g. MA2069h. MA2070i. MA2071SAE MA2060 Revision A- 4 -3.3.1 Passages:3.3.1.1 Drill Offset: On fittings where the fluid passage is dri
18、lled from each end, the offset between the drilled holes at the meeting point of the drills shall not exceed 0.4 mm.3.3.1.2 Cross Section: On angle fittings, the cross sectional area at the junction of the fluid passages shall not be smaller than the cross sectional area of the smaller passage.3.4 P
19、erformance:Fitting samples in accordance with Table 2 welded to tubing shall meet the requirements of 3.5.1, 3.5.2, 3.5.3, and 3.5.4 when tested in accordance with the test procedures specified in Section 4 of this document.TABLE 2 - Qualification Test Samples3.4.1 Proof Pressure: The assembly shall
20、 withstand proof pressures of 40 000 kPa without leakage or wetting, evidence of permanent deformation or, at separable connectors, other malfunction that would affect assembly or disassembly.3.4.2 Impulse: The assemblies shall withstand 200 000 impulse pressure cycles without leakage or external we
21、tting when impulse tested to the requirements of MA2002.SAE MA2060 Revision A- 5 -3.4.3 Burst: The assemblies shall not rupture or leak at pressures less than 80 000 kPa.3.4.4 Flexure: The assemblies shall not rupture, leak, or show external wetting when flexture-fatigue tested to the requirements o
22、f MA2003 and MA2005.3.4.5 Gaseous Leakage: Assemblies shall pass the gaseous pressure test to the specified system operating pressure without leakage or visible bubbles for 5 min when tested in accordance with 4.6.3.6.3.4.6 Repeated Assembly: The test assembly shall withstand eight repeated assembli
23、es when tested in accordance with 4.6.3.7 without occurrence of any of the following defects:a. Leakage at any of the proof pressure tests;b. Leakage or burst at a value less than four times the nominal operating pressure during the burst pressure testing - in case that specimens are used for burst
24、tests also;c. Inability to assemble the fitting to the bottoming or seal interface point by hand;d. Gaseous leakage following final assembly when tested per 4.6.3.6.3.5 Marking:All fittings shall be identified as follows: Marking shall be etched in a location and in a manner not detrimental to the f
25、itting. Where practical, marking shall remain visible after the fitting is installed.3.5.1 Marking of Fittings: All fittings except T-rings shall be etched or embossed with the aerospace standard number, material code letter, and the manufactors name or trademark. Fittings shall be identified with t
26、he basic part number for sizes DN08 and larger. The MA portion of the basic part number may be omitted on sizes DN10 or smaller where space is limited.3.5.2 Marking of Forged Shapes: All forged shapes such as tees, elbows, and crosses shall be embossed or etch-marked with the forging manufacturers t
27、rademark, code number, or code letter.3.5.3 Marking of T-Rings and Seal Rings: The MA2062 T-rings shall be marked by giving the part number, code letter, and manufactors name, code, or trademark on the package.3.6 Workmanship:There shall be no imperfections which are detrimental to the service perfo
28、rmance. Unless a finer finish is specified on the drawing, machined areas shall be free from blurrs and longitudinal or spiral tool marks in excess of 2.5 m Ra as defined in ANSI B46.1. All other machined surfaces shall not exceed 3.2 m. Unmachined areas, such as forged surfaces shall be free of lap
29、s, seams, or other defects. Parting lines in forgings shall blend smoothly with the forging body and shall have a finish not exceeding 6.3 m as defined in ANSI B46.1.SAE MA2060 Revision A- 6 -4. QUALITY ASSURANCE PROVISIONS:4.1 Responsibility for Inspection and Test:Unless otherwise specified, the s
30、upplier is responsible for the performance of all inspection and test requirements specified herein. The supplier may utilize his own facilities or other facilities which have been approved by the user. The user has the right to perform any of the inspection or tests set forth in this specification,
31、 as deemed necessary to assure that the parts conform with the specified requirements.4.2 Material Certification:Tests for chemical composition and heat treat condition shall be performed to show conformance with the applicable requirements. Tensile and hardness test shall be performed to verify com
32、pliance with the requirements in material specifications under 3.2. Gas content of titanium shall be controlled in accordance with AMS 4928, except that forgings shall comply with requirements under 3.2.2. Records of these tests shall be made available to the user upon request.4.3 Inspection Lot:A l
33、ot shall consist of all parts of a given part number made from the same batch of material and processed at the same time. The supplier shall maintain a record of inspections applied to each lot.4.4 Inspection Records:The supplier shall keep a complete record of all material certifications, examinati
34、ons, inspections, and tests performed to verify conformance to the requirements of this specification. Such records shall be available upon request.4.5 Classification of Inspection:The testing and inspection shall be classified as follows:a. Qualification inspectionb. Quality conformance inspection4
35、.6 Qualification Inspection:4.6.1 Sampling Instructions: Qualification inspection shall be conducted for each fitting or part standard as listed in Table 2 and for the sizes and materials used.4.6.1.1 Test Specimen Preparation: Specimens for burst and impulse tests shall be assembled as illustrated
36、in Figure 1. Flexure test specimens shall be in accordance with MA2003.SAE MA2060 Revision A- 7 -FIGURE 1 - Examples for Burst and Impulse Test Specimen (Optional, Combined or Single)4.6.1.2 Tube Preparation: Tube ends to be welded shall be in accordance with MA2063, as applicable. Corrosion resista
37、nt steel specimens shall be alkaline cleaned or vapor degreased and then thoroughly drained and blown out to remove any remaining cleaning fluid. Titanium tubing shall be alkaline cleaned and then drained and blown out like the CRES tubing. No chlorinated solvents shall be used with titanium. Immedi
38、ately prior to welding, the tube area that will be exposed to heat shall be solvent cleaned with MEK or acetone, unless specified otherwise.4.6.2 Weldments:4.6.2.1 Weld Beads: Welds for test specimens shall be smooth and uniform in appearance, with 100% penetration and fusion of the mating tube and
39、fitting end. Undercut, thinning, concavity, or overlap at the edge of the weld bead shall be unacceptable. Underfill shall be unacceptable, except that for titanium a local blended underfill of 10% of the thinner wall thickness is allowed as long as it does not exceed 50% of the weld circumference.
40、Cracks, weld craters, or open holes in the weld are unacceptable, except that a local blended depression in the weld tail-out area in the middle of the weld reinforcement width with a maximum of 0.1 mm depth 0.4 m diameter is not regarded as detrimental.NOTE: Definitions of welding terms, such as un
41、dercut and overlap, are given inANSI/AWS A3.0.SAE MA2060 Revision A- 8 -4.6.2.2 Weld Porosity: Subsurface porosity and inclusions shall not exceed the following items:a. Porosity and inclusions with sharp terminations are unacceptable.b. Porosity and inclusions shall not be closer together than thre
42、e times the size of the smallest adjacent pore or inclusion in its largest dimension.c. Interconnected porosity, or two or more pores or inclusions which are closer together than the largest dimension of the smaller adjacent pore or inclusion, shall be considered as a single pore or inclusion.d. Por
43、osity and inclusions shall not exceed 1/2 of the wall thickness in their largest dimension or 0.5 mm, whichever is less.e. Porosity and inclusions shall not exceed an accumulated length of 1-1/3 of the wall thickness in any lineal 13 mm of weld.4.6.2.3 Weld Discoloration: For titanium weldments, the
44、 following applies regarding discoloration:a. Bright silver to straw to pale violet is acceptable. Light blue is acceptable only on the base metal, provided it does not contact the weld metal. All discoloration shall be removed when additional welding is to be performed.b. Discoloration removal, whe
45、n required, shall be done with a suitable abrasive fabric such as Scotch-Brite Type A or S, fine to ultrafine.4.6.3 Qualification Tests:4.6.3.1 Examination of Product: Prior to testing, the fitting parts and tubing shall be submitted to quality conformance inspection. All criteria which are classifi
46、ed as major shall be measured and recorded. All welded assemblies shall be visually and penetrant inspected and x-rayed in two planes, at a 90 angle, for compliance with the requirements under 4.6.2.4.6.3.2 Proof Pressure: Test assemblies shall be connected to a source of pressure and pressure teste
47、d to the proof test value of 42 000 kPa for a period of 5 min. The test shall be conducted at room temperature.4.6.3.3 Impulse Test: Test assemblies as illustrated in Figure 1 and Table 2 shall be tested to the requirements specified in MA2002 for:a. Operating Pressure: 21 000 kPab. Peak Pressure: 3
48、1 500 kPac. Temperature: Room temperatured. Specimen: Figure 1 or equivalente. Speed: 70 cpmf. Rate of Rise: 1 200 000 to 2 070 000 kPa/s4.6.3.4 Burst Test: Test assemblies as described in Figure 1 and Table 2 shall be connected to a source of pressure. The pressure shall be increased at a rate of 1
49、50 000 kPa/min 35 000 until the assembly leaks or bursts. The tests shall be conducted at room temperature.SAE MA2060 Revision A- 9 -4.6.3.5 Flexure Test: Samples shall be fabricated and the test shall be conducted in accordance with MA2003 and MA2005 as applicable.4.6.3.6 Gaseous Leakage Test: Test fittings shall be solvent cleaned and air dried prior to test, assembled with the use of system fluid or an equivalent lubricant or compound on the thread and sleeve/nut shoulder (unless they have a solid film lubrication) and tightened to the torqu
