1、SAE Technical Standards Board Rules provide that: “This report is published by SAE to advance the state of technical and engineering sciences. The use of this report is entirelyvoluntary, and its applicability and suitability for any particular use, including any patent infringement arising therefro
2、m, is the sole responsibility of the user.”SAE reviews each technical report at least every five years at which time it may be reaffirmed, revised, or cancelled. SAE invites your written comments and suggestions.Copyright 2006 SAE InternationalAll rights reserved. No part of this publication may be
3、reproduced, stored in a retrieval system or transmitted, in any form or by any means, electronic, mechanical, photocopying,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-
4、776-0790Email: custsvcsae.orgSAE WEB ADDRESS: http:/www.sae.orgGlass, Laminated, Aircraft GlazingNOTICEThis document has been taken directly from U.S. Military Specification MIL-G-25871B, Amendment 1, Notice 1, and contains only minor editorial and format changes required to bring it into conformanc
5、e with the publishing requirements of SAE technical standards. The initial release of this document is intended to replace MIL-G-25871B, Amendment 1, Notice 1. Any part numbers established by the original specification remain unchanged.The original Military Specification was adopted as an SAE standa
6、rd under the provisions of the SAE Technical Standards Board (TSB) Rules and Regulations (TSB 001) pertaining to accelerated adoption of government specifications and standards. TSB rules provide for (a) the publication of portions of unrevised government specifications and standards without consens
7、us voting at the SAE Committee level, and (b) the use of the existing government specification or standard format.Under Department of Defense policies and procedures, any qualification requirements and associated qualified products lists are mandatory for DOD contracts. Any requirement relating to q
8、ualified products lists (QPLs) has not been adopted by SAE and is not part of this SAE technical document.AEROSPACE MATERIAL SPECIFICATIONAMS-G-25871Issued JUL 1999 Reaffirmed JAN 2006Copyright SAE International Provided by IHS under license with SAENot for ResaleNo reproduction or networking permit
9、ted without license from IHS-,-,-AMS-G-25871 SAE AMS-G-25871- 2 -1. SCOPE:1.1 Scope: This specification covers laminated glass, ready-cut, with various types of edge attachments, for use in aircraft glazing.1.2 Classification: Laminated glass shall be furnished in the following types and classes, as
10、 specified in the contract or order (see 6.2).Type I - Ready-cut, commercial polished plate or float glass.Type II - Ready-cut, high-light-transmission polished plate or float glass.Type III - Ready-cut, heat-absorbing polished plate or float glass.Type IV - Ready-cut, low expansion borosilicate pol
11、ished plate glass (coefficient of expansion from 45 to 60 X 10-7per degree Celsius between 25 and 300C)Type V - Chemically strengthen glass.In any type, glass may be specified as:Class A - FlatClass B - Curved2. APPLICABLE DOCUMENTS: The following publications, of the issue in effect on date of invi
12、tation for bids or request for proposal, form a part of this specification to the extent specified herein.2.1 U.S. Government Publications: Available from DODSSP, Subscription Services Desk, Building 4D, 700 Robbins Avenue, Philadelphia, PA 19111-5094.NN-P-530 Plywood, Flat PanelPPP-B-585 Box, Wood,
13、 WireboundPPP-B-591 Box, Fiberboard, Wood-CleatedPPP-B-601 Box, Wood, Cleated PlywoodPPP-B-621 Box, Wood, Nailed and Lock CornerPPP-B-636 Box, Shipping, FiberboardMIL-P-116 Preservation - Packaging, Methods ofMIL-L-10547 Liner, Case, And Sheet, Overwrap, Water Vaporproof or Waterproof, FlexibleMIL-B
14、-13239 Barrier Material, Waterproofed, Flexible All Temperatures, Heat SealableMIL-G-25667 Glass, Monolithic, Aircraft GlazingFED-STD-406 Plastic, Methods of TestingCopyright SAE International Provided by IHS under license with SAENot for ResaleNo reproduction or networking permitted without license
15、 from IHS-,-,-AMS-G-25871 SAE AMS-G-25871- 3 -2.1 (Continued):MIL-STD-129 Marking for Shipment and StorageMIL-STD-130 Identification Marking of U.S. Military PropertyMIL-STD-1186 Cushioning, Anchoring, Bracing, Blocking, And Waterproofing, With Appropriate Test Methods2.2 Consolidated Classification
16、 Publications: Available from Consolidated Classification Committee, 202 Chicago Union Station, Chicago, Illinois 60606.Consolidated Freight Classification Rules3. REQUIREMENTS: 3.1 Materials: 3.1.1 Glass: The glass plies used in the construction of laminates of the types specified herein shall conf
17、orm to the corresponding types of MIL-G-25667, except for identification of product.3.1.2 Interlayer: The material used for interlayer shall be stable without edge sealing and shall have suitable binding characteristics. The material shall be polyvinyl butyral or a suitable high-temperature resistan
18、t material, as specified (see 6.2). Unless otherwise specified, polyvinyl butyral, when used, shall be plasticized with either 21.0 2 parts by weight of triethylene glycol di-2-ethyl butyrate or 19.0 2 parts by weight of di-n-hexyl adipate per 100 parts resin. The laminaters serialized identificatio
19、n number code shall provide traceability as to the type of interlayer used in each laminate (see 6.2). Use of either a different plasticizer or amount of plasticer shall be approved by the procuring activity and specified in applicable drawings, specifications, or in the contract or order.3.2 Design
20、 and construction: The laminated glass shall consist of two or more plies of glass (see 6.1.5) held together by an interlayer or transparent material having suitable bonding characteristics. Laminated units may or may not have extended plastic edges, with or without metal reinforcements, as specifie
21、d in the applicable drawing, or in the contract or order.3.2.1 Parting medium: Types I through V glass may have a parting medium used to reduce or prevent bonding of the glass plies to the extended plastic edge only, to a specified portion of the interlayer only, or to both the plastic edge and inte
22、rlayer, when so specified in applicable drawing or in the contract or order.3.2.2 Edge reinforcement: Where edge reinforcement of the interlayer is employed, that portion underlying the glass shall be held to a minimum consistent with good commercial practice, or as specified in applicable drawings.
23、Copyright SAE International Provided by IHS under license with SAENot for ResaleNo reproduction or networking permitted without license from IHS-,-,-AMS-G-25871 SAE AMS-G-25871- 4 -3.3 Temper: Temper requirements for the individual glass plies shall be as specified in the contract or order in accord
24、ance with MIL-G-25667.3.4 Dimensions and tolerances: The linear dimensions and nominal thickness of Class A and Class B laminates and the curvature of Class B laminates shall be as specified by applicable drawings or specifications.3.4.1 Thickness tolerances: Unless otherwise specified in the contra
25、ct or order, the following thickness tolerances shall be allowed. Thickness tolerance for individual plies shall be as specified in MIL-G-25667. Laminates shall have a thickness tolerance of 0.8 mm (0.03 in.) for assemblies of 9.5 mm (0.38 in.) thickness or less, 1.6 mm (0.06 in.) for assemblies bet
26、ween 9.5 and 25.4 mm (0.38 and 1 in.) in thickness, and 3.2 mm (0.12 in.) for assemblies above 25.4 mm (1 in.) in thickness.3.4.2 Linear tolerances: Unless otherwise specified, the following linear dimensional tolerances shall be allowed. Annealed glass assemblies 6.4 mm (0.25 in.) or under in thick
27、ness shall be allowed a linear dimensional tolerance of 0.8 mm (0.03 in.). Annealed glass assemblies over 6.4 mm (0.25 in.) thick shall be allowed a linear dimensional tolerance of 1.6 mm (0.06 in.). Tempered glass assemblies regardless of thickness shall be allowed a linear dimensional tolerance of
28、 1.6 mm (0.06 in.) and an overall slippage tolerance of 1.6 mm (0.06 in.).3.4.3 Curvature: Unless otherwise specified in the contract or order, Class B units shall not vary from the specified contour by more than 3.2 mm (0.12 in.) when tested as specified in 4.4.7.3.5 Resistance to temperature chang
29、e: When tested as specified in 4.4.2, the laminates shall withstand the temperature change without cracking, clouding, delamination, formation of bubbles, or other evidence of deterioration. For the laminates containing components of dissimilar size, the separation of small flakes or chips beyond th
30、e trim line of the smaller glass shall not be considered evidence of deterioration.3.6 Nonscatterability: Laminates subjected to the impact test in accordance with 4.4.3 shall show no separation of glass and interlayer other than in a permissible spot 6.4 mm (0.25 in.) diameter at point of impact, a
31、nd within the area 3.2 mm (0.12 in.) wide along either side of any fracture line propagating from the point of impact. Very small amounts of glass may leave the underside of the assembly because of fracture of the bottom plate.Copyright SAE International Provided by IHS under license with SAENot for
32、 ResaleNo reproduction or networking permitted without license from IHS-,-,-AMS-G-25871 SAE AMS-G-25871- 5 -3.7 Original luminous transmittance: The original luminous transmittance of Types I, II, IV and V laminates shall be equal to or greater than the requirements in Table I when tested in accorda
33、nce with 4.4.4. The original luminous transmittance of Types I, II, IV and V laminates with a high-temperature resistant interlayer may be 0.032 percent less than the requirements of Table I for each 0.025 mm (0.001 in.) of interlayer thickness. The original luminous transmittance requirement for Ty
34、pe III laminates and laminates with an electrical conductive coating shall be as specified in the contract or order.TABLE I. Original luminous transmittance3.8 Solar-radiation transmittance: This requirement applies only to Type III laminates. Individual plies of heat-absorbing glass shall comply wi
35、th the solar-radiation transmittance requirements for Type III glass of MIL-G-25667.3.9 Original haze: The percentage of haze for all laminates shall not exceed 2.0 percent for thicknesses up to 15.9 mm (0.62 in.), and 2.5 percent the thicknesses above 15.9 mm (0.62 in.), when tested in accordance w
36、ith 4.4.4. Original haze of laminates incorporating a high-temperature resistant interlayer may be 0.06 percent greater than the values specified above for each 0.025 mm (0.001 in.) of interlayer thickness.3.10 Luminous transmittance and haze after exposure: After exposure to the light exposure test
37、 specified in 4.4.5, the luminous transmittance and haze shall conform to the requirements of 3.7 and 3.9, as applicable.Copyright SAE International Provided by IHS under license with SAENot for ResaleNo reproduction or networking permitted without license from IHS-,-,-AMS-G-25871 SAE AMS-G-25871- 6
38、 -3.11 Optical inspection: Relaxed optical requirements shall be permitted only in noncritical vision areas. Unless otherwise specified in the contract or order, noncritical areas shall be as follows:a. Flat annealed glass: A border extending 25 mm (1 in.) from the edge of the daylight opening, exce
39、pt where such border allowance conflicts with optical gunsight areas.b. Curved annealed glass: A border extending 51 mm (2 in.) from the edge of the daylight opening.c. Flat and curved tempered and semitempered glass: A border extending 51 mm (2 in.) from the edge of the daylight opening, and the ar
40、ea within a 51 mm (2 in.) radius around the tong marks.3.11.1 Minor optical defects: Minor optical defects, as determined by examination in accordance with 4.4.6.1, shall be permitted only to the extent specified in the following subparagraphs. Minor optical defects are defined as inclusions in the
41、glass or interlayer such as:a. Seeds, bubbles, small cullet, and dust or dirt particles from 0.8 to 2.4 mm (0.03 to 0.09 in.) in diameter. Maximum dimension of elongated inclusions shall be determined by dividing length plus width by two.b. Fine striae, cord, thin traces of crayon and fingerprints.c
42、. Light surface scratches and fine lint or hair from 13 to 76 mm (0.5 to 3 in.) in length.d. Stones to 0.40 mm (0.016 in.) that do not have associated stress when viewed in crossed-polarizers.3.11.1.1 Critical vision area minor optical defects: Minor optical defects shall not be permitted in any cri
43、tical vision area designated in the contract or order, when:a. They are so grouped as to form an objectionable pattern or obscure vision.b. Any defect has a maximum dimension exceeding the limits of 3.11.1.c. The total number for the applicable sheet size and thickness exceeds the additive total per
44、mitted by MIL-G-25667 for the individual glass plies plus the allowable number specified in Table II for each interlayer.3.11.1.2 Noncritical vision and other area minor optical defects: Minor optical defects in a noncritical vision area and light surface sleeks, light plastic rubs or streaks, and b
45、lemishes smaller than the minimum stated dimensions in any area shall be disregarded, provided they neither form an objectionable pattern nor are so grouped as to impair visibility. The presence of vents, stones (greater than 0.40 mm or below 0.40 mm if stress causing), or vee-edge chips in any area
46、 shall be cause for rejection. The area of the laminate covered by the mounting frame and extending 6.4 mm (0.25 in.) inboard may include any defect except vents, stones (greater than 0.40 mm or below 0.40 mm if stress causing), vee-edge chips, and blowings exceeding 6.4 mm (0.25 in.) deep and 25.4
47、mm (1 in.) long. Unless otherwise specified, the noncritical vision area shall be as defined in 3.11.Copyright SAE International Provided by IHS under license with SAENot for ResaleNo reproduction or networking permitted without license from IHS-,-,-AMS-G-25871 SAE AMS-G-25871- 7 -TABLE II. Allowabl
48、e minor defects in each interlayer3.11.2 Optical deviation: For all types of fiat laminates, the optical deviation requirements, except for any gunsight areas, shall be as specified in the contract or order, when tested in accordance with 4.4.6.2. Areas of Class A units which are components of optic
49、al gunsights shall have an optical deviation requirement of 31.5 seconds of arc when tested in accordance with 4.4.6.2.2.3.11.3 Optical distortion: Limits of optical distortion shall be as approved by the procuring activity and specified in applicable drawings, specifications, or in the contract or order. Testing shall be in accordance with 4.4.6.3.3.12 Identification of product: Each laminated unit
