1、MS-10373, Change L, 2010-11-10, Page 1 Copyright Chrysler Group LLC (08-06-2007) Chrysler Group LLC Document Number: MS-10373 Material Standard Date Published: 2010-11-10 Category Code: B-4 Change Level: L EASL Requirement: Yes Restricted: No DUCTILE CAST IRON 1.0 GENERAL 1.1 Purpose of the Standard
2、 This standard describes the requirements for ductile (nodular) irons used in either the as-cast or heat treated condition. Grades A and AA are ferritic grades that are used in high ductility and impact resistant applications. Grades B, BH and BN are pearlitic grades and BQT is a martensitic grade u
3、sed in high strength applications. This standard does not cover the requirements for austempered ductile iron (MS-7959). 1.2 Purpose of the Material FERRITIC grades of ductile iron are used in high ductility and impact resistant applications such as suspension components. PEARLITIC grades of ductile
4、 iron are used in high strength applications such as crankshafts and brackets. MARTENSITIC grades are typically used for gears and can be produced to a wide range of properties; depending on the final hardness, this grade offers the highest wear resistance and the highest strength with corresponding
5、 reduced toughness and ductility. 1.3 Coverage of this Standard This standard covers the chemical composition, mechanical properties, physical properties; microstructure and heat treat requirements for these materials. 1.4 Correlation to Other Standards TABLE 1: MATERIAL STANDARD CROSS-REFERENCE MAT
6、RIX FERRITIC PEARLITIC MARTENSITIC Grade Grade A Grade AA Grade B Grade BH Grade BN Grade BQT Condition As cast Annealed As cast As cast Normalize or Normalize parts may require testing before approval will be given. 3.2.3 Ultrasonic Velocity Designated safety parts require 100% ultrasonic velocity
7、inspection as outlined in PS-5450. All castings produced by the in-mold process require 100% ultrasonic velocity inspection as outlined in MS-10373, Change L, 2010-11-10, Page 4 Copyright Chrysler Group LLC (08-06-2007) PS-5450 until process reliability for nodularity control has been established an
8、d approved by the Cast Metals Lab. The location for ultrasonic inspection will be designated on the part drawings. 3.2.4 Radiographic Inspection* Castings that require radiographic inspection must follow the guidelines of PS-1011. Safety critical cast components shall be radiographic inspected on an
9、 audit basis per CS-10460. The minimum requirements will include one casting per cavity per shift at the production foundry, or a frequency agreed upon by the supplier and the Cast Metals Lab. Discontinuity severity levels are rated in comparison to the reference radiographs of ASTM E-446. Acceptanc
10、e/rejection criteria for internal soundness will be established during the development phase of the component and will be based on the nature and seriousness of the indications and their location within the casting. Unless otherwise agreed upon or specified on the drawing, the acceptance criteria de
11、faults to Level 2 per ASTM E-446. Areas of the casting that are deemed critical or require better than Level 2 shall be reflected on the part drawings, otherwise the whole part is assumed to meet Level 2. Changes in the pattern, molding or casting that may alter the internal soundness of the part re
12、quire evaluation by radiographic inspection. 3.2.5 Materials Engineering Guidelines for Approval and Continuing Conformance of Cast Components Refer to CS-10460 for guidelines to approval and continuing conformance of cast components. 3.2.6 Safety Parts When PF-SAFETY is listed in the CATIA Model or
13、 part drawing, the requirements of PF-SAFETY and EM-10003 must be satisfied. For ductile iron castings the Primary Measurement requirement of EM-10003 shall be 100% nodularity inspection per 3.2.3 and the Secondary Measurement shall include hardness, microstructure and tensile testing to maintain lo
14、t control. 4.0 MATERIAL CHARACTERISTICS The following properties are not intended as material requirements. The properties are listed as typical properties to aid in the design of ductile iron castings. TABLE 5: PHYSICAL PROPERTIES Grades A, AA B, BH, BN, BQT Matrix Ferritic Pearlitic or Martensitic
15、 Density, g/cu cm (lb/cu in) 7.10 (0.257) 7.15 (0.258) Coefficient of Thermal Expansion Temperature Range, deg. C (deg. F) Coef. X 10exp6 per deg. C (deg. F) Coef. X 10exp6 per deg. C (deg. F) 20 -110 (70 -230) 11.2 (6.23) 10.6 (5.89) 20 - 200 (70 - 390) 12.2 (6.78) 11.7 (6.51) 20 - 300 (70 - 570) 1
16、2.8 (7.12) 12.4 (6.89) 20 - 400 (70 - 750) 13.2 (7.34) 13.0 (7.23) 20 - 500 (70 - 930) 13.5 (7.51) 13.3 (7.39) 20 - 600 (70 - 1110) 13.7 (7.62) 13.6 (7.56) MS-10373, Change L, 2010-11-10, Page 5 Copyright Chrysler Group LLC (08-06-2007) TABLE 5: PHYSICAL PROPERTIES Grades A, AA B, BH, BN, BQT 20 - 7
17、00 (70 - 1290) 13.8 (7.67) - 20 - 760 (70 - 1400) 14.8 (8.23) 14.8 (8.23) 20 - 870 (70 - 1600) 15.3 (8.51) 15.3 (8.51) 4.1 Poissons Ratio The generally accepted value is 0.275 for most ductile irons. 4.2 Modulus of Elasticity A commonly used value for all grades of ductile iron is 165 GPa (24 X 10ex
18、p6 psi). 5.0 QUALITY Refer to CS-9801 for general quality requirements. 5.1 Part Validation Standards Part Validation Standards, which are described in CS-11171, are required for all critical components and encouraged for all non-critical components. Critical components are described and listed in C
19、S-10460, which also provides test requirement guidelines for critical and non-critical cast components. 6.0 DEFINITIONS/ABBREVIATIONS/ACRONYMS PVS: Part Validation Standard 7.0 GENERAL INFORMATION Three asterisks “*” after the section/paragraph header denotes single or multiple technical changes to
20、the section/paragraph. Specific technical changes within a section, subsection, table, or figure may be highlighted in yellow. Certain important information relative to this standard has been included in separate standards. To assure the processes submitted meet all of Chrysler requirements, it is m
21、andatory that the requirements in the following standards be met. CS-9800 - Application of this standard, the subscription service, and approved sources CS-9003 - Regulated substances and recyclability Within Engineering Standards, the Regulatory (Government-mandated) requirements are designated by
22、and which correspond to Safety and Emission Shields respectively. When applicable, the Chrysler mandated requirements are designated by which correspond to the Diamond symbol and by for Appearance related objectives, respectively. For specific information on this document, please refer to the contac
23、t person shown in the “Publication Information“ Section of this document. For general information on obtaining Engineering Standards and Laboratory Procedures, see CS-9800 or contact the Engineering Standards Department at . MS-10373, Change L, 2010-11-10, Page 6 Copyright Chrysler Group LLC (08-06-
24、2007) 8.0 REFERENCES Chrysler Standards ASTM Standards ISO Standards SAE Standards Federal Standards CS-9003 MS-7959 ASTM-E446 SAE J434 CS-9800 PF-SAFETY ASTM-A247 CS-9801 PS-1011 ASTM-A536 CS-10460 PS-5450 CS-11171 EM-10003 Quality and Reliability Documents Other Documents 9.0 ENGINEERING APPROVED
25、SOURCE LIST* TABLE 6: ENGINEERING APPROVED SOURCE LIST Materials covered by this standard shall only be purchased from the source(s) listed in this table. SUPPLIER LOCATION SUPPLIER CODE A AA B BH BN BQT Burnham Foundry Corp. Zanesville, OH 20262A X X Cifunsa Foundry Mexico 50094 X X Castwell Produc
26、ts Skokie, IL 16376 X X X X X X CWC-Textron Muskegon, MI X X X X Dana - Perfect Circle Hagerstown, IN 72222 X GM Powertrain Group Defiance, OH 23258 X X X X X X Georg Fischer Mettmann Foundry Mettmann, Ger 39154A X X Grede Brewton Brewton, AL 43385 X X X Grede Marion Marion, AL X Grede Biscoe Biscoe
27、, NC X X Grede Columbiana Columbiana, AL X X Grede Foundries, Inc. - New Castle New Castle, IN 59842K X Grede Foundries, Inc. - Reedsburg Reedsburg, WI 59842E X X X Grede Foundries, Inc. - St. Cloud St. Cloud, MN 59842M X Grede Foundries, Inc. - Liberty Div. Wawatose, WI 42894 X X Cadillac Operation
28、s Cadillac, MI 23033 X X Hitachi - EMI Erie, PA 48674 X X Hitachi Metals Ltd. Tokyo, Japan 74560 X X X X X X DMI - Columbus Foundry Columbus, GA 28814 X X X X Northern Castings Hibbing, MN 42509 X X Metal Technologies Ravenna, MI X X MS-10373, Change L, 2010-11-10, Page 7 Copyright Chrysler Group LL
29、C (08-06-2007) TABLE 6: ENGINEERING APPROVED SOURCE LIST Materials covered by this standard shall only be purchased from the source(s) listed in this table. SUPPLIER LOCATION SUPPLIER CODE A AA B BH BN BQT Metal Technologies Auburn, IN X X Rochester Metal Products Rochester, IN X X Sagar Richards Ha
30、lifax, England 41060 X X Standard Induction Foundry Windsor, ONT X X X Teksid - Iron FMB Bello Horizonte, Brazil 17767 X X Tupy American Foundry Corp Joinville, Brazil 29563 X X Waupaca Marinette, WI 97604 X X X Waupaca Waupaca, WI 97604 X X X X Waupaca Etowah, TN X X X X Waupaca Tell City, IN 97604
31、 X X X X Wescast Industries, Inc. Brantford, Ontario 97919A X X Wescast Industries, Inc. Wingham, Ontario 97919 X X 10.0 PUBLICATION INFORMATION* Contact/Phone Number: Philip Seaton / 248-576-6992 Alternate Contact/Phone Number: Lin Zhang /248-576-0235 Department Name & Department Number/Tech Club/O
32、rganization: Metallic Materials Engineering, Department 5810 Date Standard Originally Published: 2000-08-25 Date Published: 2010-11-10 Change Notice: Description of Change: - Modified paragraph 3.2.4 Radiographic Inspection to add default acceptance criteria. - Updated EASL. - Updated contact information. # # # # #
