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. 2017 by Navistar, Inc. FEBRUARY 2017 Page 1 of 17 NAVISTAR, INC. Material, Parts, and Process Specificati
2、ons (MPAPS) NUMBER: MPAPS A-37 Former Designation: CEMS A-37 18-8 is a common 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
3、steel types: 302, 302B, 302HQ, 303, 304 or 304L. NUMBER: MPAPS A-37 TITLE Stainless/Heat Resistant Steels and Finish Requirements CURRENT ISSUE DATE: 1702 This document is restricted and may not be sent outside Navistar, Inc. or reproduced without permission from Corporate Technical Standards. Suppl
4、iers are required to assume all patent liability. 2017 by Navistar, Inc. FEBRUARY 2017 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
5、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 10.50-11.70 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 1.0
6、0 10.5-12.5 1.50 - - 430 S43000 0.12 1.00 0.040 0.030 1.00 16.00-18.00 0.75 - 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
7、-18.00 0.75-1.25 Cb+Ta 5 x C min 0.70 max 439 S43035 0.030 1.00 0.040 0.030 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 S43932 0.030 1.00 0.040 0.030 1.00 17.0-19.0 0.50 0.2+(C+N) Ti+Nb0.75; Al 0.15 max; N 0.030 max - S43940 0.030 1.00 0.040 0.015 1.00 17.5-18.5 - Ti 0.
8、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 0.040 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
9、 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 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
10、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 16.00-18.00 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 0.40-0.6
11、5 NUMBER: MPAPS A-37 TITLE Stainless/Heat Resistant Steels and Finish Requirements CURRENT ISSUE DATE: 1702 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 liabilit
12、y. 2017 by Navistar, Inc. FEBRUARY 2017 Page 5 of 17 TABLE I (contd) - PRECIPITATION HARDENING TYPES Type * UNS No. Chemical Composition, % (Maximum Unless Otherwise Shown) 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 N 0.0
13、10 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 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 manufac
14、turers 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 austenitic grades be slightly higher than that shown in the table. The user and producer should agree on the appropriate nickel rang
15、es for such grades. NUMBER: MPAPS A-37 TITLE Stainless/Heat Resistant Steels and Finish Requirements CURRENT ISSUE DATE: 1702 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 a
16、ll patent liability. 2017 by Navistar, Inc. FEBRUARY 2017 Page 6 of 17 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 .
17、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 . 21-5
18、5N 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 0.20
19、- 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 VF2
20、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 . 0
21、.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 - Balan
22、ce - 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: 1702 This document is restricted and may not be sent outside Navistar, Inc. or reproduced without permission from Corporate Technical Standards. S
23、uppliers are required to assume all patent liability. 2017 by Navistar, Inc. FEBRUARY 2017 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 of mart
24、ensitic 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 done
25、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 12
26、5 517 75 Half Hard 1034 150 758 110 Three-Quarter Hard 1207 175 931 135 Full Hard 1276 185 965 140 6.2.1 Sheet/Plate/Strip Stainless steel in the form of sheet/plate/strip supplied to this specification shall conform to the minimum mechanical properties specified in Table IV, unless otherwise specif
27、ied on the drawing or purchase order. The mechanical properties of martensitic and precipitation-hardening grades are dependent on heat treatment, and required properties should be specified on the drawing or purchase order. NUMBER: MPAPS A-37 TITLE Stainless/Heat Resistant Steels and Finish Require
28、ments CURRENT ISSUE DATE: 1702 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. 2017 by Navistar, Inc. FEBRUARY 2017 Page 8 of 17 TABLE IV - MECHANICAL PR
29、OPERTY REQUIREMENTS (SHEET/STRIP/PLATE) (Refer to ASTM A240 for more information) Designation Min. Tensile Strength Min. Yield Strength % Min. Elongation Hardness (max) AISI UNS No. ksi MPa ksi MPa HB AUSTENITIC TYPES 201 S20100 75 515 38 260 40 217 202 S20200 90 620 38 260 40 241 S20400 95 655 48 3
30、30 35 241 301 S30100 75 515 30 205 40 217 302 S30200 75 515 30 205 40 201 304 S30400 75 515 30 205 40 201 304L S30403 70 485 25 170 40 201 305 S30500 70 485 25 170 40 183 310 S31000 75 515 30 205 40 217 316 S31600 75 515 30 205 40 217 316L S31603 70 485 25 170 40 217 321 S32100 75 515 30 205 40 217
31、347 S34700 75 515 30 205 40 201 FERRITIC TYPES 405 S40500 60 415 25 170 20 179 409 S40900 55 380 25 170 20 179 409Ni S40975 60 415 40 275 20 197 S41003 66 455 40 275 18 223 430 S43000 65 450 30 205 22 183 439 S43035 60 415 30 205 22 183 S43932 60 415 30 205 22 183 434 S43400 65 450 35 240 22 - 436 S
32、43600 65 450 35 240 22 - S43940 62 430 36 250 18 180 441 S44100 62 427 38 262 28 NUMBER: MPAPS A-37 TITLE Stainless/Heat Resistant Steels and Finish Requirements CURRENT ISSUE DATE: 1702 This document is restricted and may not be sent outside Navistar, Inc. or reproduced without permission from Corp
33、orate Technical Standards. Suppliers are required to assume all patent liability. 2017 by Navistar, Inc. FEBRUARY 2017 Page 9 of 17 6.2.2 Tubing For stainless steel tubing, refer to ASTM A 269 for requirements for seamless and welded austenitic tubing for general service. This type of tubing would g
34、enerally be available in Types 304, 304L, and other 300-series austenitic grades, having a minimum ” (6.4 mm) inside diameter, and minimum 0.020 in. (0.51mm) nominal wall thickness. For mechanical tubing grades, refer to ASTM A 554 for requirements for welded austenitic stainless steel tubing up to
35、16 in (406.4 mm) outside dimension and having minimum wall thickness of 0.020 in (0.51 mm). This type of tubing is generally available in round, square, or rectangular shapes. The grade of stainless steel tubing should be specified on the engineering drawing, along with any other special requirement
36、s or conditions. Tubing will be supplied with mill finish, unless otherwise specified. Refer to Table VII in MPAPS A-37 Appendix for tubing property ranges. 6.2.3 Pipe For stainless steel pipe, refer to ASTM A 312 for requirements. This standard covers seamless, straight-seam welded, and cold worked
37、 austenitic stainless steel pipe. Refer to industry catalogs for available grades and sizes. 6.3 Dimensional Tolerances Material purchased to this specification will conform to the dimensional tolerances shown in the applicable industry product standard. The following tables list dimensional toleran
38、ces for the most common stainless steel products. TABLE V - THICKNESS TOLERANCES FOR COLD ROLLED SHEETS IN CUT LENGTHS AND COILS AND FOR HOT ROLLED SHEETS IN CUT LENGTHS* Specified Thickness Tolerance (Plus or Minus) mm inch mm inch Thru 0.13 Over 0.13 to 0.18 Over 0.18 to 0.41 Over 0.41 to 0.66 Ove
39、r 0.66 to 1.02 Thru 0.005 Over 0.005 to 0.007 Over 0.007 to 0.016 Over 0.016 to 0.026 Over 0.026 to 0.040 0.03 0.04 0.05 0.08 0.10 0.001 0.0015 0.002 0.003 0.004 Over 1.02 to 1.47 Over 1.47 to 1.83 Over 1.83 to 2.11 Over 2.11 to 2.49 Over 0.040 to 0.058 Over 0.058 to 0.072 Over 0.072 to 0.083 Over 0
40、.083 to 0.098 0.13 0.15 0.18 0.20 0.005 0.006 0.007 0.008 Over 2.49 to 2.90 Over 2.90 to 3.30 Over 3.30 to 3.68 Over 3.68 to 4.76 Over 0.098 to 0.114 Over 0.114 to 0.130 Over 0.130 to 0.145 Over 0.145 to 0.1875 0.23 0.25 0.30 0.36 0.009 0.010 0.012 0.014 * Per ASTM A 480 NUMBER: MPAPS A-37 TITLE Sta
41、inless/Heat Resistant Steels and Finish Requirements CURRENT ISSUE DATE: 1702 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. 2017 by Navistar, Inc. FEBR
42、UARY 2017 Page 10 of 17 TABLE VI - THICKNESS TOLERANCES FOR COLD ROLLED STRIP IN COILS AND IN CUT LENGTHS Specified Thickness Tolerance (plus or minus)* Width of Strip, mm (inch) From 4.76 thru 152.4 mm From 0.1875 thru 6.000 inches Over 152.4 thru 304.8 mm Over 6.000 thru 12.000 inches Over 304.8 t
43、hru 609.6 mm Over 12.000 Thru 24.000 inches mm inch From 0.13 thru 0.25 Over 0.25 thru 0.28 Over 0.28 thru 0.33 Over 0.33 thru 0.43 Over 0.43 thru 0.51 From 0.005 thru 0.010 Over 0.010 thru 0.011 Over 0.011 thru 0.013 Over 0.013 thru 0.017 Over 0.017 thru 0.020 10% 0.038 0.038 0.038 0.038 10% 0.0015
44、 0.0015 0.0015 0.0015 10% 0.038 0.038 0.050 0.050 10% 0.0015 0.0015 0.0020 0.0020 10% 0.038 0.050 0.050 0.064 10% 0.0015 0.0020 0.0020 0.0025 Over 0.51 thru 0.74 Over 0.74 thru 0.89 Over 0.89 thru 1.27 Over 1.27 thru 1.75 Over 0.020 thru 0.029 Over 0.029 thru 0.035 Over 0.035 thru 0.050 Over 0.050 t
45、hru 0.069 0.050 0.050 0.064 0.080 0.0020 0.0020 0.0025 0.0030 0.064 0.080 0.089 0.089 0.0025 0.0030 0.0035 0.0035 0.064 0.080 0.089 0.089 0.0025 0.0030 0.0035 0.0035 Over 1.75 thru 2.54 Over 2.54 thru 3.18 Over 3.18 thru 4.09 Over 4.09 thru 4.76 Over 0.069 thru 0.100 Over 0.100 thru 0.125 Over 0.125
46、 thru 0.161 Over 0.161 thru 0.1875 0.080 0.100 0.114 0.130 0.0030 0.0040 0.0045 0.0050 0.100 0.114 0.114 0.130 0.0040 0.0045 0.0045 0.0050 0.130 0.130 0.130 0.150 0.0050 0.0050 0.0050 0.0060 * Including crown tolerances For stainless steel tubing tolerances, refer to the applicable industry standard
47、 (e.g., ASTM A 269, ASTM A 554, etc.). 7.0 FINISH REQUIREMENTS 7.1 Mechanical Finishes Unless otherwise specified, stainless steel sheet will be supplied with No. 2B finish, and strip will be supplied with No. 2 finish. Refer to MPAPS A-37 Appendix, Section A.5.0, for more information and definition of stainless steel sheet/strip surface finishes. 7.2 Chemical Finishes If a chemical finish is required for a given part, the type of finish will be specified on the part drawing, and must meet the
