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 entirely voluntary, and its applicability and suitability for any particular use, including any patent infringement arising theref
2、rom, 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 2011 SAE International All rights reserved. No part of this publication ma
3、y be 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)
4、Fax: 724-776-0790 Email: CustomerServicesae.org SAE WEB ADDRESS: http:/www.sae.orgSAE values your input. To provide feedback on this Technical Report, please visit http:/www.sae.org/technical/standards/MA3375CMETRICAEROSPACESTANDARDMA3375 REV. C Issued 1981-06 Reaffirmed 2006-05 Revised 2011-08Super
5、seding MA3375B Studs, Corrosion and Heat Resistant Steel, UNS S66286 Tensile Strength 900 MPa, Procurement Specification, Metric FSC 5307 RATIONALETo revise paragraph 3.6 by adding “two to” three threads in agreement with NASM1312 test methodology and general updating of specifications and SAE forma
6、tting requirements. 1. SCOPE 1.1 Type This document covers metric studs made from a corrosion and heat resistant, age hardenable iron base alloy of the type identified under the Unified Numbering System as UNS S66286. The following specification designations and their properties are covered: MA3375
7、900 MPa minimum ultimate tensile strength at room temperature MA3375-1 900 MPa minimum ultimate tensile strength at room temperature 480 MPa stress-rupture strength at 650 C MA3375-2 900 MPa minimum ultimate tensile strength at room temperature 590 MPa minimum ultimate shear strength at room tempera
8、ture 1.1.1 Two types of studs are covered as follows: Type I - Studs with stud end thread having special oversize pitch diameter and lead thread with undersize pitch diameter, while nut end thread is standard size Type II - Studs with stud end thread and nut end thread standard size 1.2 Application
9、Primarily for aerospace propulsion system applications where a good combination of strength and resistance to corrosion are required. MA3375 studs are intended for use where the coefficient of expansion of the stud is more compatible for use in aluminum or magnesium alloys. MA3375-1 studs are intend
10、ed for use at elevated temperatures in corrosion resistant steel parts. MA3375-2 studs are intended for studs loaded in shear. 1.2.1 Type I studs are intended for torque driving into aluminum or magnesium alloy tapped hole by interference fit assembly of stud end thread in accordance with MAP1670 st
11、udding practice. SAE MA3375C Page 2 of 191.2.2 Type II studs are intended for studding magnesium or aluminum alloys, and steel or corrosion resistant steel parts by locking the assembled stud end threads in the boss to resist rotation by an auxiliary method; for example:a. By use of locking keys (in
12、dividual or ring supported) driven into the assembled stud and boss threads parallel to thread axis. b. By use of serrated lock ring driven into assembled studded boss so that internal serrations engage the stud serrated shank and external serrations broach the boss counterbore. 1.3 Safety - Hazardo
13、us Materials While the materials, methods, applications, and processes described or referenced in this specification may involve the use of hazardous materials, this specification does not address the hazards which may be involved in such use. It is the sole responsibility of the user to ensure fami
14、liarity with the safe and proper use of any hazardous materials and to take necessary precautionary measures to ensure the health and safety of all personnel involved. 2. REFERENCES 2.1 Applicable Documents The following publications form a part of this document to the extent specified herein. The l
15、atest issue of SAE publications shall apply. The applicable issue of other publications shall be the issue in effect on the date of the purchase order. In the event of conflict between the text of this document and references cited herein, the text of this document takes precedence. Nothing in this
16、document, however, supersedes applicable laws and regulations unless a specific exemption has been obtained. 2.1.1 SAE Publications Available from SAE International, 400 Commonwealth Drive, Warrendale, PA 15096-0001, Tel: 877-606-7323 (inside USA and Canada) or 724-776-4970 (outside USA), www.sae.or
17、g.AMS2700 Passivation of Corrosion Resistant Steels AMS2759/3 Heat Treatment Precipitation-Hardening Corrosion-Resistant and Maraging Steel Parts AMS5731 Steel, Corrosion and Heat Resistant, Bars, Wire, Forgings, Tubing, and Rings 15Cr 25.5Ni 1.2Mo 2.1Ti 0.006B 0.30V, Consumable Electrode Melted, 18
18、00F (982C) Solution Heat Treated AMS5732 Steel, Corrosion and Heat Resistant, Bars, Wire, Forgings, Tubing and Rings 15Cr 25.5Ni 1.2Mo 2.1Ti 0.006B 0.30V Consumable Electrode Melted 1800 (982C) Solution and Precipitation Heat Treated AMS5734 Steel, Corrosion and Heat Resistant, Bars, Wire, Forgings,
19、 and Tubing 15Cr 25.5Ni 1.2Mo 2.1Ti 0.006B 0.30V, Consumable Electrode Melted, 1650F (899C) Solution Heat Treated AMS5737 Steel, Corrosion and Heat Resistant, Bars, Wire, Forgings and Tubing 15Cr 25.5Ni 1.2Mo 2.1Ti 0.006B 0.30V, Consumable Electrode Melted, 1650F (899C), Solution and Precipitation H
20、eat Treated MA1370 Screw Threads - MJ Profile, Metric MA1518 Bolts, Screws and Nuts - External Wrenching, Metric Threads - Design Parameters for MA1520 Areas for Calculating Stress or Load Values for Metric MJ Externally Threaded Fasteners MA1566 Gaging Practice and Gage Requirements for MJ Metric S
21、crew Threads MAP1670 Studs, Installation Practice for Interference Fit, Metric SAE MA3375C Page 3 of 19AS3062 Bolts, Screws, and Studs, Screw Thread Requirements AS3063 Bolts, Screws, and Studs, Geometric Control Requirements 2.1.2 AIA Publications AIA Publications: Available from Aerospace Industri
22、es Association, 1000 Wilson Boulevard, Suite 1700, Arlington,VA 22209-3928, Tel: 703-358-1000, www.aia-aerospace.org.NASM 1312-6 Fastener Test Methods, Method 6, Hardness NASM 1312-8 Fastener Test Methods, Method 8, Tensile Strength NASM 1312-10 Fastener Test Methods, Method 10, Stress Rupture NASM
23、1312-12 Fastener Test Methods, Method 12, Thickness of Metallic Coatings MASM 1312-13 Fastener Test Methods, Method 3, Double Shear Test 2.1.3 ASTM Publications Available from ASTM International, 100 Barr Harbor Drive, P.O. Box C700, West Conshohocken, PA 19428-2959, Tel: 610-832-9585, www.astm.org.
24、ASTM E 8 Tension Testing of Metallic Materials ASTM E112 Determining Average Grain Size ASTM E 139 Conducting Creep, Creep-Rupture, and Stress-Rupture Test of Metallic Materials ASTM E 140 Standard Hardness Conversion Tables for Metals ASTM E 1417 Liquid Penetrant Examination ASTM D 3951 Commercial
25、Packaging 2.1.4 ASME Publications Available from American Society of Mechanical Engineers, 22 Law Drive, P.O.Box Box 2900, Fairfield, NJ 07007-2900 Tel 973-882-1170, www.asme.org.ASME B46.1 Surface Texture (Surface Roughness, Waviness, and Lay) 2.2 Definitions BURR: A rough edge or ridge left on the
26、 metal due to a cutting, grinding, piercing or blanking operation. TIGHT BURR: A burr closely compacted and binding in the periphery of a part without any loose ends and is within the dimensional limits of the part. DEFECTIVE: A unit of product which contains one or more defects. PRODUCTION INSPECTI
27、ON LOT: Shall be all finished parts of the same part number, made from a single heat of alloy, heat treated at the same time to the same specified condition, produced as one continuous run, and submitted for vendors inspection at the same time. SAE MA3375C Page 4 of 192.3 Unit Symbols C degree Celsi
28、us F degree Fahrenheit mm millimeter cm3cubic centimeter g gram (mass) h hour HRC hardness, Rockwell C scale % percent (1% = 1/100) kN kilonewton (force) MPa megapascal (stress) sp gr specific gravity 3. TECHNICAL REQUIREMENTS 3.1 Material Shall be AMS5731 or AMS5734 steel heading stock or AMS5732 o
29、r AMS5737 steel as specified on the part drawing. 3.2 Design Finished (completely manufactured) parts shall conform to the following requirements: 3.2.1 Dimensions The dimensions of finished parts, after all processing, including plating or coating, shall conform to the requirements as specified on
30、the part drawing. Dimensions shall apply after plating but before coating with dry film lubricants. 3.2.2 Surface Texture Surface texture of finished parts, prior to plating or coating, shall conform to the requirements as specified on the part drawing, determined in accordance with ASME B46.1. 3.2.
31、3 Threads 3.2.3.1.1 Type I Studs Unless otherwise specified on the part drawing, the threads shall be as follows: Nut end threads - Standard MJ metric screw threads in accordance with MA1370. Stud end threads - Special MJ metric screw threads as follows: a. MJ thread form in accordance with MA1370 b
32、. Dimensions for major, pitch, and minor diameters as specified on part drawing c. Undersized pitch diameter lead threads in accordance with AS3062 d. Form tolerances for stud full threads in accordance with AS3062 SAE MA3375C Page 5 of 193.2.3.2 Type II Studs Unless otherwise specified on the part
33、drawing, the stud end threads and nut end threads shall be standard MJ metric screw threads in accordance with MA1370. 3.2.3.3 Incomplete Threads Incomplete threads are permissible at the chamfered end and incomplete runout threads are permissible at the juncture of the unthreaded portion of the sha
34、nk in accordance with AS3062 except Type I studs shall have lead threads on stud end as in 3.2.3.1. 3.2.3.4 Chamfer The entering end of the thread shall be chamfered as specified on the part drawing. 3.2.4 Geometric Tolerances Part features shall be within the geometric tolerances specified on the p
35、art drawing and, where applicable, controlled in accordance with AS3063. 3.3 Fabrication 3.3.1 Blanks Blanks shall be machined sufficiently to remove surface defects. Blanks may be produced by machining, upsetting, extruding, or a combination of these methods. Heading stock to be hot upset shall not
36、 be heated to a temperature higher than 1150 C. 3.3.1.1 When a shoulder or shoulders are produced by upsetting, the metal removed from the bearing surface shall be as little as practicable to provide a clean, smooth surface. 3.3.2 Heat Treatment Shall conform to the technical requirements and other
37、provisions specified in AMS2759/3 for A-286, 980 C solution heat treatment for blanks made from AMS5731, 900 C solution heat treatment for blanks made from AMS5734, and 720 C aging treatment. 3.3.2.1 Solution Heat Treatment Blanks shall be solution heat treated as in 3.3.2. 3.3.2.2 Aging Heat Treatm
38、ent Solution treated blanks shall be heat treated by aging as in 3.3.2. 3.3.3 Oxide Removal Surface oxide and oxide penetration resulting from prior heat treatment shall be removed from the full body diameter and bearing surface of the shoulders, as applicable, of the solution heat treated and aged
39、blanks prior to rolling the threads. The oxide removal process shall produce no intergranular attack or corrosion of the blanks. 3.3.4 Thread Rolling Threads shall be formed on the heat treated and finished blank by a single cold rolling process after removal of oxide as in 3.3.3. SAE MA3375C Page 6
40、 of 193.3.5 Passivation Treatment Parts, after finishing, shall be degreased and then subjected to the passivation treatment and copper sulfate test in accordance with AMS2700. 3.4 Product Marking Each part shall be marked for oversize on the stud end thread and for material code on the nut end thre
41、ad as specified by the part drawing. The markings may be formed by stamping, depressed 0.25 mm maximum, with rounded root form on depressed characters. 3.5 Plating Where required, surfaces shall be plated as specified on the part drawing. Thickness determined in accordance with NASM 1312-12 3.6 Mech
42、anical Properties Where MA3375 is specified, parts shall conform to the requirements of 3.6.1 and 3.6.2. Where MA3375-1 is specified, parts shall conform to the requirements of 3.6.1, 3.6.2, and 3.6.4. Where MA3375-2 is specified, parts shall conform to the requirements of 3.6.1, 3.6.2, and 3.6.3. T
43、hreaded members of gripping fixtures for tensile and stress-rupture tests shall be of sufficient size and strength to develop the full strength of the part without stripping the thread. The loaded portion of the shank shall have two to three full thread turns from the thread runout exposed between t
44、he loading fixtures during the tensile and stress-rupture tests. MA3375 finished parts shall be tested in accordance with the following test methods: a1. Hardness: NASM 1312-6 b1. Ultimate Tensile Strength at Room Temperature: NASM 1312-8 MA3375-1 finished parts shall be tested in accordance with th
45、e following test methods: a2. Hardness: NASM 1312-6 b2. Ultimate Tensile Strength at Room Temperature: NASM 1312-8 c2. Stress-Rupture Strength at 650 C: NASM 1312-10 MA3375-2 finished parts shall be tested in accordance with the following test methods: a3. Hardness: NASM 1312-6 b3. Ultimate Tensile
46、Strength at Room Temperature: NASM 1312-8 c3. Ultimate Double Shear at Room Temperature: NASM 1312-13 3.6.1 Ultimate Tensile Strength at Room Temperature 3.6.1.1 Finished Parts Parts shall have an ultimate tensile load not lower than that specified in Table 1 and shall be tested to failure in order
47、to observe fracture location, first measuring and recording the maximum tensile load achieved. If the size or shape of the part is such that failure would occur outside the threaded section but the part can be tested satisfactorily, such as parts having a shank diameter equal to or less than the thr
48、ead root diameter (smaller thread root diameter for studs with unequal size threads) or having an undercut, parts shall have an ultimate tensile strength not lower than 900 MPa; for such parts, the diameter of the area on which stress is based shall be the actual measured minimum diameter of the par
49、t. SAE MA3375C Page 7 of 193.6.1.2 Machined Test Specimens If the size or shape of the part is such that a tensile test cannot be made on the part, tensile tests shall be conducted in accordance with ASTM E 8 on specimens prepared as in 4.4.6. Specimens may be required by the purchaser to perform confirmatory tests. Such specimens shall meet the following requirements: a. Ultimate Tensile Strength, minimum: 900 MPa b
