1、This document is restricted and may not be sent outside Navistar, Inc. or reproduced without permission from Corporate Technical Standards. Suppliers are required to assume all patent liability. 2014 by Navistar, Inc. APRIL 2014 Page 1 of 17 NAVISTAR, INC. Material, Parts, and Process Specifications
2、 (MPAPS) NUMBER: MPAPS A-37 Former Designation: CEMS A-37 incorporated chemical finish requirements from TMS-4117 into this document; specified mechanical finish requirements for sheet/strip in Section 7.1; moved Section A.0 to the Appendix; editorial changes. 1.0 SCOPE This specification covers req
3、uirements for stainless and heat resistant steels used in the Companys products. NOTE: Requirements for stainless steel spring wire are covered in CEMS A-9, Steel Spring Wire. Requirements for stainless steel tubing used for exhaust, coolant, or heater applications can be found in TMS-1058, TMS-1061
4、, and TMS-1069. This specification also defines the mechanical and chemical finish requirements for stainless steel surfaces, including requirements for passivation, electropolished, electropolished with chrome flash, or electrolytically micro-etched, for parts requiring a decorative, color match, c
5、orrosion/heat resistant finish, or “paint-ready” stainless steel surface. Such parts might include bright reflective grab handles, sunshades (requiring color match), exhaust pipes which require both corrosion and heat resistance, or passivated stainless steel fasteners.* These finishes are classifie
6、d according to the following Types (see Appendix for detailed description): Type 1 Electropolish only Type 2 Electropolish plus electrodeposited chrome flash (minimum Cr plating thickness of 0.08 m or 0.003 mils) applicable where color match is required Type 3 Electropolish plus electrodeposited chr
7、ome flash (minimum Cr plating thickness of 0.21 m or 0.008 mils) for high heat applications Type 4 Micro-etch only Type 5 Chemical passivation* *NOTE: All stainless steel fasteners (i.e., bolts, nuts, washers, etc.) will be passivated in accordance with this specification unless otherwise specified
8、on the drawing, purchase order, or in the applicable Engineering Standard Parts (ESP) document. However, passivated fasteners are not required to undergo CASS testing, unless specified. 2.0 INTRODUCTION Stainless steels offer good mechanical strength over a wide range of temperatures and provide cor
9、rosion resistance superior to all of the common structural steels. Some alloys can be buffed and polished for NUMBER: MPAPS A-37 TITLE Stainless/Heat Resistant Steels and Finish Requirements CURRENT ISSUE DATE: APRIL 2014 This document is restricted and may not be sent outside Navistar, Inc. or repr
10、oduced without permission from Corporate Technical Standards. Suppliers are required to assume all patent liability. 2014 by Navistar, Inc. APRIL 2014 Page 2 of 17 improved surface appearance. Passivation of stainless steels can be performed to ensure a clean surface, free from iron-bearing contamin
11、ants which may result in undesirable rust and degraded surface appearance. However, on bright or polished parts, passivation may somewhat reduce the glossy or polished appearance. 2.1 Restricted Chemical Substances Effective January 1, 2007, all product supplied to the requirements of this specifica
12、tion must comply with the requirements of the MPAPS B-50 specification. 3.0 CONTENTS PAGE CHEMICAL COMPOSITION . 3 MECHANICAL PROPERTIES 8 DIMENSIONAL TOLERANCES . 9 FINISH REQUIREMENTS . 10 QUALITY 12 DESIGNATION ON DRAWINGS AND PURCHASE ORDERS 14 PACKAGING AND SHIPPING . 15 APPENDIX GENERAL INFORM
13、ATION Green Sheets 4.0 REFERENCE DOCUMENTS Unless otherwise specified, the latest issue of all referenced standards shall apply. The following standards, specifications and regulations are referenced in this specification. Quality System Standard ISO 9001 or TS-16949 CFR Title 29, Part 1910 ASTM A 7
14、51 AWS D1.6 NAVISTAR Manufacturing Standard MS-D-13 ASTM A 240 SAE J405 ASTM A 312 NAVISTAR MPAPS B-50 ASTM A 370 ASTM A 480 ASTM A 269 TMS-1058 TMS-1061 TMS-1069 ASTM A 554 TMS-9516 CEMS A-9 5.0 MATERIAL CLASSIFICATION AND DESIGNATION Stainless steels are classified by 1) their chemical composition
15、 and resulting room temperature microstructure (e.g., austenitic, ferritic, martensitic, precipitation hardening, and duplex), 2) the American Iron and Steel Institute (AISI) numbering system (e.g., 200, 300, 400 series alloys), and 3) the Unified Numbering System (UNS), developed by ASTM and SAE, t
16、o apply to all commercial metals and alloys. 6.0 GENERAL REQUIREMENTS 6.1 Chemical Composition Steels purchased to this specification will meet the requirements of chemical composition shown in Table I for the Type specified. NUMBER: MPAPS A-37 TITLE Stainless/Heat Resistant Steels and Finish Requir
17、ements CURRENT ISSUE DATE: APRIL 2014 This document is restricted and may not be sent outside Navistar, Inc. or reproduced without permission from Corporate Technical Standards. Suppliers are required to assume all patent liability. 2014 by Navistar, Inc. APRIL 2014 Page 3 of 17 TABLE I - CHEMICAL C
18、OMPOSITION AISI Type * UNS No. Chemical Composition, % (Maximum Unless Otherwise Shown) Carbon Mn P S Si Cr Ni Mo Other Elements AUSTENITIC TYPES 201 202 * 301 18-8 302 S20100 S20200 S20400 S30100 - S30200 0.15 0.15 0.030 0.15 - 0.15 5.50-7.50 7.50-10.0 7.0-9.0 2.00 - 2.00 0.060 0.060 0.040 0.045 -
19、0.045 0.030 0.030 0.030 0.030 - 0.030 1.00 1.00 1.00 1.00 - 1.00 16.00-18.00 17.00-19.00 15.0-17.0 16.00-18.00 - 17.00-19.00 3.50-5.50 4.00-6.00 1.5-3.0 6.00-8.00 - 8.00-10.00 - - - - - N 0.25 N 0.25 N 0.15-0.30 - - - 302B S30215 0.15 2.00 0.045 0.030 2.00-3.00 17.00-19.00 8.00-10.00 - - 302HQ S3043
20、0 0.03 2.00 0.045 0.030 1.0 17.00-19.00 8.00-10.00 - Cu 3.00-4.00 303 S30300 0.15 2.00 0.20 0.15 min 1.00 17.00-19.00 8.00-10.00 0.60* - 303Se 304 304L 305 308 S30323 S30400 S30403 S30500 S30800 0.15 0.08 0.030 0.12 0.08 2.00 2.00 2.00 2.00 2.00 0.20 0.045 0.045 0.045 0.045 0.060 0.030 0.030 0.030 0
21、.030 1.00 1.00 1.00 1.00 1.00 17.00-19.00 18.00-20.00 18.00-20.00 17.00-19.00 19.00-21.00 8.00-10.00 8.00-10.50 8.00-12.00 10.50-13.00 10.00-12.00 - - - - - Se 0.15 min - - - - 309 309S 310 316 316L S30900 S30908 S31000 S31600 S31603 0.030 0.08 0.25 0.08 0.030 2.00 2.00 2.00 2.00 2.00 0.045 0.045 0.
22、045 0.045 0.045 0.030 0.030 0.030 0.030 0.030 1.00 1.00 1.50 1.00 1.00 22.00-24.00 22.00-24.00 24.00-26.00 16.00-18.00 16.00-18.00 12.00-15.00 12.00-15.00 19.00-22.00 10.00-14.00 10.00-14.00 - - - 2.00-3.00 2.00-3.00 - - - - - 321 347 S32100 S34700 0.08 0.08 2.00 2.00 0.045 0.045 0.030 0.030 1.00 1.
23、00 17.00-19.00 17.00-19.00 9.00-12.00 9.00-13.00 - - Ti 5 x C min Cb+Ta 10 x C min *Grade or Type designation originally developed by the American Iron and Steel Institute (AISI) *May be added at manufacturers option *Commercial steel grade described as Nitronic 30 Not an AISI Type; 18-8 is a common
24、 designation for types containing approximately 18% Cr and approximately 8% Ni. It is denoted here to allow its usage as a material code for drawings and purchase orders. When specified, 18-8 allows the following stainless steel types: 302, 302B, 302HQ, 303, 304 or 304L. NUMBER: MPAPS A-37 TITLE Sta
25、inless/Heat Resistant Steels and Finish Requirements CURRENT ISSUE DATE: APRIL 2014 This document is restricted and may not be sent outside Navistar, Inc. or reproduced without permission from Corporate Technical Standards. Suppliers are required to assume all patent liability. 2014 by Navistar, Inc
26、. APRIL 2014 Page 4 of 17 TABLE I (contd) AISI Type * UNS No. Chemical Composition, % (Maximum Unless Otherwise Shown) Carbon Mn P S Si Cr Ni Mo Other Elements FERRITIC TYPES 405 409 - S40500 S40900 S41050 0.08 0.03 0.04 1.00 1.00 1.00 0.040 0.040 0.045 0.030 0.020 0.030 1.00 1.00 1.00 11.50-14.50 1
27、0.50-11.70 10.5-12.5 0.50 0.60-1.10 A1 0.10-0.30 Ti 6 x (C+N) min; 0.75 max; Cb 0.17; N 0.030 N 0.10 max 409Ni S40975 0.03 1.00 0.040 0.030 1.00 10.5-11.7 0.50-1.00 Ti 6 x (C+N) min; 0.75 max - S41003 0.03 1.50 0.040 0.030 1.00 10.5-12.5 1.50 - - 430 S43000 0.12 1.00 0.040 0.030 1.00 16.00-18.00 0.7
28、5 - 430F S43020 0.12 1.25 0.060 0.15 min 1.00 16.00-18.00 430FSe 434 S43023 S43400 0.12 0.12 1.25 1.00 0.060 0.040 0.060 0.030 1.00 1.00 16.00-18.00 16.00-18.00 0.75-1.25 Se 0.15 min 436 S43600 0.12 1.00 0.040 0.030 1.00 16.00-18.00 0.75-1.25 Cb+Ta 5 x C min 0.70 max 439 S43035 0.030 1.00 0.040 0.03
29、0 1.00 17.0-19.0 0.50 - Al 0.15 max Ti 0.20 + 4(C+N) min 1.10max N 0.03 max - S43940 0.030 1.00 0.040 0.015 1.00 17.5-18.5 - Ti 0.10-0.60; Cb0.30+(3xC) min 441 S44100 0.030 1.00 0.040 0.030 1.00 17.5-19.50 1.00 - Ti 0.10-0.50; Cb 0.3+(9xC)min to 0.9 max 442 446 S44200 S44600 0.20 0.20 1.00 1.50 0.04
30、0 0.040 0.030 0.030 1.00 1.00 18.00-23.00 23.00-27.00 MARTENSITIC TYPES 410 S41000 0.15 1.00 0.040 0.030 1.00 11.50-13.50 0.75 414 S41400 0.15 1.00 0.040 0.030 1.00 11.50-13.50 1.25-2.50 416 S41600 0.15 1.25 0.060 0.15 min 1.00 12.00-14.00 0.60* 416Se S41623 0.15 1.25 0.060 0.060 1.00 12.00-14.00 Se
31、 0.15 min 420 S42000 Over 0.15 1.00 0.040 0.030 1.00 12.00-14.00 431 S43100 0.20 1.00 0.040 0.030 1.00 15.00-17.00 1.25-2.50 440A S44002 0.60/ 0.75 1.00 0.040 0.030 1.00 16.00-18.00 0.75 440B S44003 0.75/ 0.95 1.00 0.040 0.030 1.00 16.00-18.00 0.75 440C S44004 0.95/ 1.20 1.00 0.040 0.030 1.00 16.00-
32、18.00 0.75 501 S50100 Over 0.10 1.00 0.040 0.030 1.00 4.00-6.00 0.40-0.65 502 S50200 0.10 1.00 0.040 0.030 1.00 4.00-6.00 0.40-0.65 NUMBER: MPAPS A-37 TITLE Stainless/Heat Resistant Steels and Finish Requirements CURRENT ISSUE DATE: APRIL 2014 This document is restricted and may not be sent outside
33、Navistar, Inc. or reproduced without permission from Corporate Technical Standards. Suppliers are required to assume all patent liability. 2014 by Navistar, Inc. APRIL 2014 Page 5 of 17 TABLE I (contd) - PRECIPITATION HARDENING TYPES Type * UNS No. Chemical Composition, % (Maximum Unless Otherwise S
34、hown) C Mn P S Si Cr Ni Mo Other Elements 13-8PH* S13800 0.05 0.10 0.01 0.008 0.10 12.25-13.25 7.50-8.00 2.00-2.50 A1 0.90-1.35 N0.010 15-5PH * S15500 0.07 1.00 0.040 0.030 1.00 14.00-15.50 3.50-5.00 - Cu 2.50-4.50 Cb+Ta 0.15-0.45 17-4PH * S17400 0.07 1.00 0.040 0.030 1.00 15.50-17.50 3.00-5.00 - C
35、3.00-5.00 Cb+Ta 0.15-0.45 17-7 PH * S17700 0.09 1.00 0.040 0.040 1.00 16.00-18.00 6.50-7.75 - A1 0.75-1.50 * May be added at manufacturers option. * Common industry nomenclature; not an AISI designation. NOTE: For some tube-making processes, it is necessary that the nickel content of several of the
36、austenitic grades be slightly higher than that shown in the table. The user and producer should agree on the appropriate nickel ranges for such grades. NUMBER: MPAPS A-37 TITLE Stainless/Heat Resistant Steels and Finish Requirements CURRENT ISSUE DATE: APRIL 2014 This document is restricted and may
37、not be sent outside Navistar, Inc. or reproduced without permission from Corporate Technical Standards. Suppliers are required to assume all patent liability. 2014 by Navistar, Inc. APRIL 2014 Page 6 of 17 Heat resisting steels and alloys used in high temperature applications requiring wear resistan
38、ce are listed in Table II, along with the required chemical compositions. TABLE II - CHEMICAL COMPOSITIONS OF TYPICAL MATERIALS FOR VALVE APPLICATIONS Designation Composition, percent (maximum, unless otherwise shown) Navistar Grade SAE C Mn P S Si Cr Ni Mo Fe Co Nitro- gen Other NCR* EV1 0.37- 0.50
39、 . 1.00 . 0.035 0.035 1.00 23.00- 24.00 . 4.50- 5.00 . 2.50- 3.00 . Balance TXCR* EV2 0.35- 0.40 . 4.00- 4.50 . 0.030 0.030 0.60- 1.00 . 23.50- 24.50 . 3.50- 4.00 . 1.20- 1.50 . Balance 21-12N EV4 0.15- 0.25 . 1.00- 1.50 . 0.030 0.030 0.70- 1.25 . 20.00- 22.00 . 10.50- 12.50 . Balance 0.15- 0.20 . 2
40、1-55N EV7 0.15- 0.25 . 5.00- 8.00 . 0.040 0.030 1.00 . 19.00- 22.00 . 3.50- 6.00 . Balance 0.20- 0.40 . 21-4N EV8 0.47- 0.58 . 8.00- 10.00 0.050 0.090 0.25 . 20.00- 22.00 . 3.25- 4.50 . Balance 0.38- 0.50 . 21-2N EV12 0.50- 0.60 . 7.00- 9.50 . 0.050 0.060 0.25 . 19.25- 21.50 . 1.50- 2.75 . Balance 0
41、.20- 0.40 . SP-3 2.25- 2.75 . 1.0 . 18.00- 22.00 . 37.00- 43.00 . Balance 10.00- 14.00 . Tungsten 5.00-7.00 No. 1* HNV3 0.40- 0.50 . 0.20- 0.60 . 0.030 0.030 3.00- 3.50 . 8.00- 9.00 . Balance XB* HNV6 0.76- 0.86 . 0.20- 0.60 . 0.020 0.030 1.90- 2.60 . 19.00- 21.00 . 1.00- 1.60 . Balance Stellite 6 V
42、F2 0.90- 1.40 . 1.00 . 1.50 . max . 27.00- 31.00 . 3.0 max . 1.5 3.0 Balance Tungsten 3.5-5.5 Designation Composition, percent (maximum, unless otherwise shown) Navistar Grade SAE C Mn P S Si Cr Ni Mo Fe Co Nitro- gen Other Stellite F VF3 1.50- 2.00 . 0.05 . 0.90- 1.50 . 23.00- 27.00 . 20.50- 24.00
43、. 0.060 . 3.0 Balance Tungsten 10.5-13.5 Boron 0.01 max 71360 0.50- 0.55 . 0.20- 0.40 . 0.030 0.030 0.20- 0.40 . 3.00- 4.00 . Balance Tungsten 12.00-15.00 Pyromet 31V - 0.045 0.2 - - 0.2 22.6 56.5 2.0 Balance 1.0 - 1.3 Al, 2.3 Ti, 0.85 Nb, 0.005 B TRW 25-12NbN - 0.3 5.0 0.04 0.03 0.30 25.0 11.5 - Ba
44、lance - 0.6 2.2 Nb * Silchrome alloys Haynes Stellite 6 NUMBER: MPAPS A-37 TITLE Stainless/Heat Resistant Steels and Finish Requirements CURRENT ISSUE DATE: APRIL 2014 This document is restricted and may not be sent outside Navistar, Inc. or reproduced without permission from Corporate Technical Sta
45、ndards. Suppliers are required to assume all patent liability. 2014 by Navistar, Inc. APRIL 2014 Page 7 of 17 6.2 Mechanical Properties Stainless steel or heat resisting alloys are usually furnished in an “as-rolled” or “as-annealed” condition, unless otherwise specified. The mechanical properties o
46、f martensitic and precipitation-hardening grades are dependent on heat treatment. These properties are specified when commodities are to be received in a final condition. The tensile strength of certain 200 and 300 series strip and sheet products can be increased by temper rolling. Temper rolling is
47、 done at extra cost and the degree of temper designates the minimum attained tensile strength. The minimum tensile strengths associated with the temper classifications are shown in Table III. TABLE III TEMPER DESIGNATIONS Temper Tensile Strength, min Yield Strength, min MPa ksi MPa ksi Quarter Hard 862 125 517 75 Half Hard
