1、 WORLDWIDE ENGINEERING STANDARDS Material Specification GMW15184 Spring Hose Clamp Copyright 2013 General Motors Company All Rights Reserved June 2013 Page 1 of 12 1 Scope This standard covers the materials and performance requirements for spring band hose clamps. Spring band hose clamps must functi
2、on with hose/nipple connections of a variety of dimensional ranges and must have a full open diameter which is large enough to install the hose clamp over a bead when the hose clamp is already assembled. Clamp size will be designated by its Nominal Diameter (Dn) to distinguish between different hose
3、 clamp working ranges. 1.1 Material Description. The material used is an austempered carbon steel. Generally, a coating per GMW14083 is applied for resistance against corrosion and general automotive fluids. 1.2 Symbols. Not applicable. 1.3 Typical Applications. This specification covers five types
4、of Constant Tension Band (CTB) Clamps: Type A: Normally Closed, Regular Profile (see Figure 1). Type B: Pre-opened with Clip, Regular Profile (see Figure 2). Type C: Pre-opened Clipless (see Figure 3). Type D: Normally Closed, Low Profile (Space Saver) (see Figure 4). Type E: Pre-opened with Clip, L
5、ow Profile (Space Saver) (see Figure 5). Figure 1: Clamp Type A, Normally Closed, Regular Profile (see Figure A1 for specifications) Figure 2: Clamp Type B, Pre-opened with Clip, Regular Profile (see Figure A2 for specifications) Copyright General Motors Company Provided by IHS under license with Ge
6、neral Motors CompanyNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-GM WORLDWIDE ENGINEERING STANDARDS GMW15184 Copyright 2013 General Motors Company All Rights Reserved June 2013 Page 2 of 12 Figure 3: Clamp Type C, Pre-opened Clipless (see Figure A3 for specifica
7、tions) Figure 4: Clamp Type D, Normally Closed, Low Profile (Space Saver) (see Figure A4 for specifications) Figure 5: Clamp Type E, Pre-opened with Clip, Low Profile (Space Saver) (see Figure A5 for specifications) 2 References Note: Only the latest approved standards are applicable unless otherwis
8、e specified. 2.1 External Standards/Specifications. ASTM E18 EN 10083-1 ASTM E140 SAE J403 EN 10132-4 SAE J404 2.2 GM Standards/Specifications. GMW3059 GMW14083 2.3 Additional References. TMC003 Material Safety Data Sheet guidance documents (available at ). 3 Requirements 3.1 Material. The hose clam
9、ps may be produced from either cold rolled chromium-vanadium alloy steel or SAE J403 Grades 1074 and 1075 or JIS Grade SK5. See Table 1 for acceptable materials.Table 1: Steel Grades Standard Chemical Composition EN 10132-4 51CrV4 C: 0.50 to 0.55 Mn: 0.8 to 1.1 V: 0.1. to 0.25 EN 10132-4 C75S Option
10、al: Cr: 0.15 to 0.40 Copyright General Motors Company Provided by IHS under license with General Motors CompanyNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-GM WORLDWIDE ENGINEERING STANDARDS GMW15184 Copyright 2013 General Motors Company All Rights Reserved June
11、 2013 Page 3 of 12 Standard Chemical Composition EN 10083-1 50CrV4 C: 0.47 to 0.55 Mn: 0.7 to 1.10 V: 0.1 to 0.25 SAE J404 Grade 6150 SAE J404 Grade 6150 modified C: 0.50 to 0.55 Mn: 0.8 to 1.1 V: 0.1. to 0.2 SAE J403 Grade 1074 - SAE J403 Grade 1075 Optional: Cr: 0.15 to 0.40 JIS Grade SK5 C (0.80
12、to 0.90), Si (Max. 0.35), Mn (Max. 0.5), P (Max. 0.03), S (Max. 0.03), Cr (Max. 0.3), Cu (Max. 0.25), Ni (Max. 0.25) Key:C = Carbon Cr = Chromium Cu = Copper Max. = Maximum Mn = Manganese Ni = Nickel Si = Silicon S = Sulfur V = Vanadium Grain flow of the metal must be in the longitudinal direction o
13、f the part (see Figure 6). Phosphate-type coating as a processing aid for the manufacture of cold rolled steel band is not allowed. Figure 6: Clamp Shape and X-Y Directions of Hose Clamps 3.2 Material Hardness. 3.2.1 Clamps shall be austempered to a hardness of 470 to 580 HV10/HV30 or 47 to 54 HRC.
14、3.2.2 Hardness shall be taken on the ground edge (side surface) after 0.3 mm cold grinding or on the tang, the side opposite the stamped number per ASTM E18. Note: For thinner material, use HR45N per ASTM E18 and convert results to HV or HRC values per ASTM E140. 3.3. Protective Coatings and Colors.
15、 Hose clamps shall be coated per GMW14083 to prevent corrosion. 3.4 Dimensions, Closed and Full Open Diameter. See Figure 7 and Figure 8.Copyright General Motors Company Provided by IHS under license with General Motors CompanyNot for ResaleNo reproduction or networking permitted without license fro
16、m IHS-,-,-GM WORLDWIDE ENGINEERING STANDARDS GMW15184 Copyright 2013 General Motors Company All Rights Reserved June 2013 Page 4 of 12 Figure 7: Example - Maximum Closed Diameter (D1) Figure 8: Example - Minimum Full Open Diameter (D2) 3.4.1 The hose clamps must meet the dimensional requirements as
17、shown on the part drawings. 3.4.2 The closed diameter (D1) is to be measured in the X-direction (see Figure 6) by using a dial gage. 3.4.3 The full open diameter (D2) is to be measured on a step gage or gage pin with 0.1 mm increments. Note: The full open position occurs at an appropriate force when
18、 the stop just contacts the opposite tang. Excessive force can distort the clamp and cause variation in clamp load and dimensions. 3.5 Dimensional Measurements. 3.5.1 Prior to measuring, the hose clamps must be opened to their full open diameter once for 5 s to 10 s. 3.5.2 It is important that clamp
19、s are deflected evenly. This can be achieved only by using an appropriate tool that does not deform or damage parts during use. 3.5.3 Clamps Type B, C and E supplied in the pre-opened condition shall be released while the base is held in rubber padded jaw or over a mandrel. 3.5.4 A set of random sam
20、ples (30 minimum) when tested shall meet a statistical spread with -3 sigma values greater than the D1 Maximum shown in Appendix A. 3.6 Performance Requirements. 3.6.1 Clamping Force. 3.6.1.1 Hose clamps shall meet minimum clamping forces as shown in Appendix A. Part sizes and styles not mentioned i
21、n Appendix A are to be specified on individual part drawing or part catalog. 3.6.1.2 The testing frequency is to be determined by supplier with approval of GM. 3.6.1.3 Clamping Force Measurement. 3.6.1.3.1 The clamping force of the hose clamp must be measured on a three (3) segment load cell. 3.6.1.
22、3.2 For submission of test data, a three segment tester that has been shown to correlate with the Master Tester at GM must be used. 3.6.1.3.3 Contact Fastening Engineering for information concerning this tester. 3.6.1.3.4 The load cell must be calibrated on frequency as per International Organizatio
23、n for Standardization (ISO) certification requirements. 3.6.1.3.5 Clamps must be fully opened once (see 3.4.1) before being tested for clamping force. 3.6.1.3.6 The clamping force measurement shall be run on clamps of every individual heat lot of steel. 3.6.1.3.7 The supplier shall retain all test r
24、ecords for a period of one year after date of test. Test reports shall be submitted to GM Engineering and Supplier Quality upon request. D 1D 2Copyright General Motors Company Provided by IHS under license with General Motors CompanyNot for ResaleNo reproduction or networking permitted without licen
25、se from IHS-,-,-GM WORLDWIDE ENGINEERING STANDARDS GMW15184 Copyright 2013 General Motors Company All Rights Reserved June 2013 Page 5 of 12 Figure 9: Orientation of a Hose Clamp on a 3-Segment Load Cell 3.6.1.4 The clamping force must be measured at a diameter which corresponds to the nominal hose
26、clamp size. If applicable due to force tester design, the force tester diameter shall be set up for each size using a ring gage of nominal diameter (Dn 0.05 mm) such that the average force preload is between 5 N and 15 N when the tester pins (rollers) are against the inside diameter of the ring gage
27、. 3.6.1.5 The clamping force is the average of the three measured forces. 3.6.1.6 For repeatability of test, place the hose clamp on the load cell fixture by indexing the small arc between the tangs always at the same location (segment 1) with respect to the load cell segments as shown in Figure 9.
28、Note: Load cells with additional segments may be used for clamp development purposes. 3.6.1.7 Clamping force measurement requirements are shown in Appendix A. 3.6.1.8 Pre-opened clamps shall be load tested (Development (DV) and Production Parts Approval Process (PPAP) only) after an exposure to ambi
29、ent temperature of 23 C 5 C for 168 h in the pre-opened position. For Pre-opened clip or clipless clamps, the supplier must provide tooling required to release the clamp. 3.7 Roundness. When testing for roundness, there shall be no gap between the hose clamp and the plug gage greater than the follow
30、ing: 0.12 mm for nominal sizes 50 mm 3.7.1 Roundness Test. For testing the roundness of a hose clamp, the clamp shall be assembled on a plug gage with a ground surface. Any gap between the hose clamp and the plug gage shall be measured with a feeler gage with a 3 mm maximum band width. 3.7.2 Dependi
31、ng on the nominal hose clamp size, the Plug Gage Diameter (Dp) of the gage shall be as shown in Table 2. Table 2: Plug Gage Diameters for Roundness Tests Nominal Hose Clamp Size Dn, Millimeters Plug Gage Diameter Dp, Millimeters 35 Dp = Dn -0.6 3.8 Hydrogen Assisted Cracking Process Control Test. Th
32、e following test shall be conducted regularly (three parts each lot at a minimum) on hardened and uncoated hose clamps as a process control test to ensure effective Copyright General Motors Company Provided by IHS under license with General Motors CompanyNot for ResaleNo reproduction or networking p
33、ermitted without license from IHS-,-,-GM WORLDWIDE ENGINEERING STANDARDS GMW15184 Copyright 2013 General Motors Company All Rights Reserved June 2013 Page 6 of 12 austempering and avoidance of martensitic transformation in the material. The clamps are to be installed on a plastic mandrel and immerse
34、d in a 0.9% HCl solution for 8 minutes. The diameter of the plastic mandrel must be 0.2 mm to 0.3 mm smaller than the minimum full open diameter of the clamp size. The clamps must withstand this test for 8 minutes without cracking or breakage. 3.9 Cold Cycle Test Development. The clamps must be able
35、 to withstand five cycles of opening from the closed condition to the full open condition while at -40 C. Condition a minimum of five clamps at -40 C for 4 h. Immediately after removal from the conditioning chamber, cycle the clamps from the closed position to the full open position five times withi
36、n 30 s. Any cracking or fracture of any clamp constitutes a failure. 4 Manufacturing Process Not applicable. 5 Rules and Regulations 5.1 Legal Regulations. All materials must satisfy applicable laws, rules, regulations and recommendations valid in the country of usage. 5.2 Language. In the event of
37、conflict between the English and domestic language, the English language shall take precedence. 5.3 Inspection and Rejection. Samples of components or materials released to a GM material specification shall be tested for conformity with the requirements of this material specification and approved by
38、 the responsible Engineering department prior to commencement of delivery of bulk supplies. A new approval must be received for any changes, e.g., properties, manufacturing process, location of manufacture, etc. If not otherwise agreed, all testing and documentation normally required for initial rel
39、ease must be completed. It is the responsibility of the supplier to inform the customer in a timely manner, without solicitation, and to include documentation of all modifications of materials and/or processes and to apply for a new release. If not otherwise agreed, all release tests shall be repeat
40、ed and documented by the supplier prior to commencement of delivery of non-conforming bulk supplies. In individual cases, a shorter test can be agreed to between the responsible Engineering department and the supplier. 5.4 Material Safety Data Sheets/Safety Data Sheets (MSDS/SDS). For new product su
41、bmissions, or when a change in chemical composition of an existing product has occurred, a complete copy of the Material Safety Data Sheet/Safety Data Sheet must be submitted in compliance with the Globally Harmonized System of Classification and Labeling of Chemicals (GHS) requirements or other cou
42、ntry-specific MSDS/SDS requirements. In addition, product MSDS/SDS submissions must be in compliance with specific country General Motors TMC003 Material Safety Data Sheet/Safety Data Sheet guidance documents where available. 5.5 All materials supplied to this standard must comply with the requireme
43、nts of GMW3059, Restricted and Reportable Substances for Parts. 6 Approved Sources Materials supplied to this specification must be approved by General Motors. A list of approved materials can be found in MATSPC. This GM Material File is provided to third parties to reduce redundant testing of mater
44、ials. If approved material already listed is used, the part supplier can use GM Material File reference for Production Part Approval Process (PPAP) material approval. If the decision is made to use a not yet approved material, contact Global Materials Groupfor details on the approval process. The ma
45、terial approval process must be completed prior to PPAP start date of the part supplied to General Motors. 7 Notes 7.1 Glossary. MATSPC: Global repository of GM approved materials for corresponding GM Engineering Standards. 7.2 Acronyms, Abbreviations, and Symbols. C Carbon Cr Chromium CTB Constant
46、Tension Band Cu Copper D1 Closed Diameter D2 Full Open Diameter Dn Nominal Diameter Dp Plug Gage Diameter DV Development Copyright General Motors Company Provided by IHS under license with General Motors CompanyNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-GM WOR
47、LDWIDE ENGINEERING STANDARDS GMW15184 Copyright 2013 General Motors Company All Rights Reserved June 2013 Page 7 of 12 GHS Globally Harmonized System of Classification and Labeling of Chemicals HR45N Hardness Rockwell 45N HRC Hardness Rockwell C HV10/HV30 Hardness Vickers ISO International Organizat
48、ion for Standardization Max. Maximum Min. Minimum Mn Manganese MSDS Material Safety Data Sheet Ni Nickel POPP Pre-opened, Pre-positioned PPAP Production Part Approval Process S Sulfur SDS Safety Data Sheet Si Silicon V Vanadium 8 Coding System This standard shall be referenced in other documents, dr
49、awings, etc., as follows: Material per GMW15184 Type x Where x=A, B, C, D and E as described in 1.3. 9 Release and Revisions This standard was originated in February 2006. It was first approved by the Global Fastening Team in October 2008. It was first published in January 2009. Issue Publication Date Description (Organization) 1 JAN 2009 Initial publicati
