1、 This document is restricted and may not be sent outside International Truck and Engine Corporation or reproduced without permission from Corporate Technical Standards. Suppliers are required to assume all patent liability. Ga42001 by International Truck and Engine Corporation. OCTOBER 2001 Page 1 o
2、f 6 INTERNATIONAL TRUCK AND ENGINE CORPORATIONCEMS (CORPORATE ENGINEERING MATERIAL SPECIFICATION)NUMBER: CEMS A-33 TITLE: Steel for Ball Bearing Race Rings CURRENT ISSUE DATE: October 2001 WRITTEN/REVIEWED BY: Materials Engineering APPROVED BY: Materials Engineering SUPERSEDES ISSUE OF: July 1999 PR
3、INTED COPIES OF THIS DOCUMENT MUST BE VERIFIED FOR CURRENT REVISION This specification may involve hazardous materials, equipment, and procedures. This specification does not purport to address all of the safety issues associated with its use. The user is responsible to consult appropriate safety an
4、d health practices and to determine the applicability of regulatory limits prior to use. Change Notice: Editorial Changes 1.0 SCOPE This specification covers the Corporations requirement for chromium steel bars and seamless tubing for use in the manufacture of ball bearing race rings or for other sp
5、ecial purposes. 2.0 INTRODUCTION Ball bearing race rings supplied to the requirements of this specification are produced from bearing Quality, E 52100 steel that is vacuum carbon deoxidized. 3.0 CONTENTS PAGE REFERENCE DOCUMENTS 1 GENERAL REQUIREMENTS 2 CHEMICAL COMPOSITION . 2 METALLURGICAL REQUIRE
6、MENTS . 2 DIMENSIONAL TOLERANCES 3 QUALITY . 4 METHODS OF TEST . 4 SOURCE APPROVAL AND QUALITY CONTROL 6 DESIGNATION ON DRAWINGS AND PURCHASE ORDERS 6 PACKING AND SHIPPING 6 4.0 REFERENCE DOCUMENTS Unless otherwise specified, the latest issue of all referenced standards shall apply. The following st
7、andards, specifications and regulations are referenced in this specification. Unless otherwise specified, Product supplied shall confirm to the general requirements of ASTM A 29. Quality System Standard QS-9000 (ISO 9001) ASTM A 29 INTERNATIONAL IQR Quality Standard ASTM A 295 INTERNATIONAL Manufact
8、uring Standard D-13 ASTM A 892 CFR Title 29, Part 1910 ASTM E 45 ASTM E 112 ASTM E 381 5.0 CLASSIFICATION (Not applicable) NUMBER: CEMS A-33 TITLE: Steel for Ball Bearing Race Rings CURRENT ISSUE DATE: October 2001 This document is restricted and may not be sent outside International Truck and Engin
9、e Corporation or reproduced without permission from Corporate Technical Standards. Suppliers are required to assume all patent liability. Ga42001 by International Truck and Engine Corporation. OCTOBER 2001 Page 2 of 6 6.0 GENERAL REQUIREMENTS 6.1 Chemical Composition Steel purchased to this specific
10、ation will conform to the analysis for SAE E 52100 and will be bearing quality, vacuum carbon deoxidized. 6.2 Metallurgical Requirements 6.2.1 Hardness Annealed bars and seamless tubing purchased to this specification will have hardness of Brinell 167-192 (Rockwell B 86-92) with the exception of the
11、 following products as shown in Table I: TABLE I Product Hardness Annealed, Machine Straightened, Rough Turned 167 - 217 Bhm Rockwell B 86 97 Round Bars Annealed, Cold Drawn 255 Bhn, max Rockwell C25, max 6.2.1.1 Hardness is not specified for the following products: Round Bars, Hot Rolled Seamless T
12、ubing, Annealed, Tube Reduced. 6.2.2 Inclusion Ratings The inclusion rating will be determined in accordance with ASTM E 45, Method D. The average of all specimens tested, as well as 67% of all specimens, will not exceed the rating specified in Table II. See “Methods of Test, “ page 4. TABLE II INCL
13、USION RATINGS Inclusion Type Thin Series Heavy Series A B C D 2-1/2 2 2 1-1/2 1-1/2 1-1/2 1-1/2 1-1/2 6.2.3 Seams And Surface Defects The depths of seams or other surface defects, including decarburization, will not exceed requirements described in ASTM A295. Grip marks on one end of cold drawn prod
14、ucts are permissible provided they do not exceed 0.010 in (0.25 mm) in depth or 4 in (102 mm) in length. See “Methods of Test,” Section 8. 6.2.4 Austenitic Grain Size Austenitic grain size will be No. 7 or finer. See “Methods of Test,” Section 8. 6.2.5 Homogeneity Steel provided to this specificatio
15、n will meet requirements of ASTM A295 for homogeneity Macroetch. NUMBER: CEMS A-33 TITLE: Steel for Ball Bearing Race Rings CURRENT ISSUE DATE: October 2001 This document is restricted and may not be sent outside International Truck and Engine Corporation or reproduced without permission from Corpor
16、ate Technical Standards. Suppliers are required to assume all patent liability. Ga42001 by International Truck and Engine Corporation. OCTOBER 2001 Page 3 of 6 6.2.6 Carbide Form And Distribution Steel will have fine, uniformly distributed carbides as per ASTM A892 and be relatively free from bandin
17、g. Carbide size rating will not be greater than CS3: carbide network rating will not be greater than CN3: lamellar content will not be greater LC1 as per ASTM A892. 6.3 Dimensional Tolerances 6.3.1 Bars Dimensional tolerances will conform to those specified in ASTM A29. 6.3.2 Seamless Tubing Dimensi
18、onal tolerances will conform to Tables III (below) and IV (page 4). TABLE III OUTSIDE DIAMETER AND WALL TOLERANCES Wall Variation Limit, Over & Under, Percent OD Size OD Tolerance, Over & Under Product in mm in mm Wall Thicknesses Over 0.203 thru 1.124 in (5.16 thru 28.55 mm) Wall Thicknesses of 1.1
19、25 in (25.58 mm) and Over Hot Rolled, Annealed 1.750 thru 3.499 3.500 thru 4.499 4.500 thru 5.499 5.500 thru 6.999 7.000 thru 7.999 8.000 thru 8.999 9.000 thru 9.999 10.000 thru 10.999 44.45 thru 88.87 88.90 thru 114.27 114.30 thru 139.67 139.70 thru 177.77 177.80 thru 203.17 203.20 thru 228.57 228.
20、60 thru 253.97 254.00 thru 279.40 0.015 0.020 0.025 0.030 0.035 0.040 0.050 0.060 0.38 0.51 0.64 0.76 0.89 1.02 1.27 1.52 Annealed, Turned(1)1.750 thru 6.750 6.751 thru 7.949 44.45 thru 171.45 171.48 thru 201.93 0.005 0.010 0.13 0.25 10 7.5 Annealed, Cold Drawn (2) (3)Thru 1.499 1.500 thru 3.499 3.5
21、00 thru 5.499 *5.500 thru 6.999 *7.000 thru 7.999 8.000 thru 9.999 Thru 38.07 38.10 thru 88.87 88.90 thru 139.67 139.70 thru 177.77 177.80 thru 203.17 203.20 thru 253.97 0.005 0.007 0.010 0.015 0.020 0.025 0.13 0.18 0.25 0.38 0.51 0.64 7.5 7.5 Annealed, Tube Reduced Thru 1.499 1.500 thru 2.999 3.000
22、 thru 3.999 4.000 thru 4.999 5.000 thru 5.499 Thru 38.07 38.10 thru 76.17 76.20 thru 101.57 101.60 thru 126.97 127.00 thru 139.67 0.005 0.007 0.010 0.012 0.015 0.13 0.18 0.25 0.30 0.38 5 5 * If the wall thickness is 7.5% of less of the OD, the OD tolerances for the ranges 5.500 thru 6.999 in., 7.000
23、 thru 7.999 in. and 8.000 thru 9.999 in. become 0.020 in., 0.025 in and 0.035 in., respectively. NOTE 1 Turned tubing is not available with an outside diameter less than 1.750 in or with weight less than 5 lb/ft (3.4 kg/m). NOTE 2 Annealed, cold drawn tubing with wall thicknesses less than 3% of the
24、 OD cannot be straightened properly without distortion. Consequently, while such tubing has an average OD within the tolerances of the above table, an ovality tolerances of 0.5% of the nominal OD, in additional to the OD tolerances indicated above, will be allowed. NOTE 3 The wall variation limits o
25、f annealed, cold drawn tubing with an ID less than 0.500 in. (12.7 mm) 0.625 in (15.88 mm) if the wall is more than 20% of the OD will be 12.5% except for (1) tubing with a wall thickness of 1.125 in (28.58 mm) or less and an ID of less than 50% of the NUMBER: CEMS A-33 TITLE: Steel for Ball Bearing
26、 Race Rings CURRENT ISSUE DATE: October 2001 This document is restricted and may not be sent outside International Truck and Engine Corporation or reproduced without permission from Corporate Technical Standards. Suppliers are required to assume all patent liability. Ga42001 by International Truck a
27、nd Engine Corporation. OCTOBER 2001 Page 4 of 6 OD, which cannot be mandrel drawn, or (2) tubing with a wall thickness of 1.125 in. or less where this wall thickness constitutes more than 25% of the OD, which cannot be mandrel drawn. The wall variation limits for these latter two will be 10%. TABLE
28、IV STRAIGHTNESS TOLERANCES Size Limits Maximum Curvature * OD Total Lengths Total Lengths in mm Wall Thick- ness In Any 3 ft Length Under 5 ft 5 ft and Over In Any m Length Under 1.5 m 1.5 m and Over Thru 5.00 Thru 127.00 Over 3% of OD 0.030 Ratio of 0.010 in/ft Ratio of 0.0067 in/ft 0.83 Ratio of 0
29、.83 mm/m Ratio of 0.56 mm/m 5.001 thru 8.000 127.03 thru 203.20 Over 4% of OD 0.045 Ratio of 0.015 in/ft Ratio of 0.010 in/ft 1.25 Ratio of 1.25 mm/m Ratio of 0.83 mm/m 8.001 thru 11.000 203.23 thru 279.40 Over 4% of OD 0.060 Ratio of 0.020 in/ft Ratio of 0.015 in/ft 1.67 Ratio of 1.67 mm/m Ratio of
30、 1.25 mm/m * See “Methods of Test.” 7.0 QUALITY All product supplied shall be clean and free from dirt, oils, sharp edges, or defects harmful to product performance. The supplier should be capable of providing statistical evidence that the material has been manufactured within process control limits
31、 established by the supplier for this product and that the process is capable of meeting the requirements of this specification. 8.0 METHODS OF TEST 8.1 Inclusion Ratings The polished surface of the specimen for the microscopic determination of the inclusion content will be 0.25 in2(160 mm2) in area
32、, or larger and will be obtained as indicated for the product shown. The surface to be examined will be parallel to the direction of grain flow. 8.1.1 Samples The number and location of test specimens will be as follows: 8.1.1.1 Billets Obtain specimens from six locations in the heat, taken from the
33、 top and bottom of the first, middle and last ingot poured. The specimens will be taken from the billets as prescribed in ASTM E45. 8.1.1.2 Bars Obtain specimens from ten bars selected at random from each lot or heat. Take the specimens as specified in ASTM E45. For bars under 1.5 in (38 mm) in diam
34、eter, refer to “Wire and Rods,” below. 8.1.1.3 Tubing Obtain specimens from ten tubes selected at random from each lot or heat. Examine a complete section of the tube wall, of sufficient length to give an area of at least 0.25 in2, as shown in the figure below. 8.1.1.4 Wire and Rods Obtain specimens
35、 which represent ten coils or rods selected at random from each lot or heat. Examine a section the width of a chord midway between the surface and center, of sufficient length to give an area of 0.25 in2, as shown in the figure below. For convenience in handling, the wire may be cut to suitable leng
36、ths, however, the specified area must be maintained. NUMBER: CEMS A-33 TITLE: Steel for Ball Bearing Race Rings CURRENT ISSUE DATE: October 2001 This document is restricted and may not be sent outside International Truck and Engine Corporation or reproduced without permission from Corporate Technica
37、l Standards. Suppliers are required to assume all patent liability. Ga42001 by International Truck and Engine Corporation. OCTOBER 2001 Page 5 of 6 Specimen from Tubing For Inclusion Rating Specimen from Wire, Rod, or Bar under 1.5 in diameter for Inclusion Rating 8.1.2 Preparation of Specimens Prep
38、are the surface to be examined with careful metallographic technique to avoid enlarging inclusions or causing pits which may be mistaken for inclusions. In case of controversy, harden the sample before preparation. 8.1.3 Examination of Specimens Determine the inclusion ratings in accordance with AST
39、M E45, Method D. Fields with size or numbers of all types of inclusions intermediate between configurations shown on the chart will be classified as the lesser of the rating number. The worst field of each inclusion type from each specimen will be recorded as the rating for the specimen. 8.2 Seams A
40、nd Surface Defects Measure depth on a polished cross section by conventional microscopic means. Alternate methods may be used for convenience in inspection. 8.3 Austenitic Grain Size Obtain a sample 0.25 in (6.35 mm) in diameter and 2 in (50.89 mm) long. Heat to 1550 F (843 C) for 40 minutes total t
41、ime and quench in 120-140 F (49-60 C) oil having a viscosity of 95-110 Saybolt Universal Seconds at 100 F (38 C). Fracture the sample and compare to the Shepherd fracture grain size standards as per ASTM E112 (A4). Navistar Test Methods AT-2 may be used as an alternate method. 8.4 Homogeneity Prehea
42、t to 160 to 180 F (71 to 82 C) a ground or suitable machined cross section of the bar or tubing. Then immerse in a solution of equal parts hydrochloric acid and water maintained at this temperature, for approximately 35 minutes. Shorter times may not reveal details while longer times may obliterate
43、detail. Immediately after removal from the etching solution, scrub the surfaces with a soft brush while washing under hot water, then dry under an air blast. Examine the cross section under a well diffused light. Compare the samples to be photographic plates described in ASTM E381. 8.5 Carbide Form
44、and Distribution Obtain samples for examination in the as-received condition. Cut samples so that the surface to be examined is parallel to the direction of rolling. Samples from bars will be at the mid-radius, while those from tubing will be a complete section of the wall. 8.6 Straightness Toleranc
45、es Measure the tolerance for any 3-ft. or meter of length with a straight edge of sufficient length and feeler gage. Determine the maximum curvature in the total length by rolling the tubing on a surface plate and measure the curvature with a feeler gage. NUMBER: CEMS A-33 TITLE: Steel for Ball Bear
46、ing Race Rings CURRENT ISSUE DATE: October 2001 This document is restricted and may not be sent outside International Truck and Engine Corporation or reproduced without permission from Corporate Technical Standards. Suppliers are required to assume all patent liability. Ga42001 by International Truc
47、k and Engine Corporation. OCTOBER 2001 Page 6 of 6 9.0 SOURCE APPROVAL AND QUALITY CONTROL 9.1 Supplier Requirements Suppliers must conform to the requirements of the International IQR Quality Standard which includes conformance to the QS-9000 (ISO 9001) Quality System Standard. A mutually acceptabl
48、e Quality Control Plan as described therein is required for source approval to the requirements of this specification. 9.2 Approval Parts supplied against contracts or purchase orders citing this specification shall be equivalent in all respects to those samples which were approved by the purchaser. No changes
