1、GM DAEWOO Auto & Technology EDS Engineering, GM DAEWOO Auto & Technology. Standards MECHANICAL PROPERTIES OF STEEL NUTS EDS-G-1114 ISSUED DATE: 1996. 06. 10 REVISED DATE: 2006. 06. 19 VERSION: 3 EDS-G-1114MECHANICAL PROPERTIES OF STEEL NUTS PAGE: 1/7 ISSUED DATE: 2002.11. 20 REVISED DATE: 2006. 06.
2、19 VERSION: 3 GM DAEWOO Auto & Technology 1. SCOPE This standard specifies the mechanical properties, testing methods, and screw indication methods of the steel nuts (hereinafter called the “nut“). Remark : The units and values in in this standard conform to the international unit standard(SI) and i
3、s for reference. 2. MECHANICAL PROPERTIES 2.1. Mechanical properties according to strength class Mechanical properties according to strength class shall conforms to Table 1 and 2. Table 1 Mechanical properties of high nutMetric coarse screw threads Metric fine screw threads TYPE 1 TYPE 2 TYPE 1 TYPE
4、 2 Hardness Hardness Hardness Hardness Nominal diameter HV HRC HV HRC HV HV Property class of high nut Over To Proof load stress * (1) Min. Max. Min. Max. Quench & TemperProof load stress * (1) Min. Max. Min. Max.Quench & TemperProof load stress * (1) Min. Max. Quench & Temper Proof load stress * (1
5、) Min. Max.Quench & Temper- 16 - - - - - - 4 16 39 510 52.0 117 302 - 30 None - - - - - - - - - - - - - - - 4 520 53.0 4 7 580 59.1 7 10 590 60.2 10 16 610 62.2 130 3025 16 39 630 64.2 146 302- 30 None - - - - - - - - - - - - - - - 4 600 61.2 4 7 670 68.3 150 302 - 30 None - - - - - - - - - - 7 10 6
6、80 69.3 770 78.510 16 700 71.4 150 302 - 30 None - - - - - - 780 79.5188 302 None 16 33 - - - - - - 870 88.76 33 39 720 73.4 170 302 - 30 None 930 94.8233 302 None (2) - - - - *(1) N/mm2 kgf/mm2 EDS-G-1114MECHANICAL PROPERTIES OF STEEL NUTS PAGE: 2/7 ISSUED DATE: 2002.11. 20 REVISED DATE: 2006. 06.
7、19 VERSION: 3 GM DAEWOO Auto & Technology Table 1 (Continued) Metric coarse screw threads Metric fine screw threads TYPE 1 TYPE 2 TYPE 1 TYPE 2 Hardness Hardness Hardness Hardness Nominal diameter HV HRC HV HRC HV HV Property class of high nut Over To Proof load stress * (1) Min. Max. Min. Max. Quen
8、ch & TemperProof load stress * (1) Min. Max. Min. Max.Quench& TemperProof load stress * (1) Min. Max. Quench Temper Proof load stress * (1) Min. Max.Quench & Temper- 4 800 81.6 170 3024 7 810 82.6 188 302- 30 None - - - - - - - - - - - - - - 7 10 830 84.6 10 16 840 85.7 188 302 - 30 None - - - - - -
9、 955 97.4250 353 Yes 890 90.8195 302 None 16 33 - - - - - - 1030 105 8 33 39 920 93.8 233 353 - 38 Yes - - - - - - 1090 111 295 353 Yes - - - - - 4 - - - - - - 900 91.8 170 3024 7 - - - - - - 915 93.3 7 10 - - - - - - 940 95.9 10 16 - - - - - - 950 96.9 9 16 39 - - - - - - 920 93.8 188 302- 30 None
10、- - - - - - - - - 7 1040 106 272 353 28 38 Yes - - - - - - - - - - - - - - 7 10 1040 106 1110 113 10 16 1050 107 272 353 28 38 Yes - - - - - - 1110 113 295 353 1055106250 353 Yes 10 16 39 1060 108 272 353 28 38 Yes - - - - - - - - - - 1080110260 353 Yes - 7 1150 117 295 353 31 38 Yes 1150 117 272 35
11、3 28 38 Yes - - - - - - - - 7 10 1160 118 1160 118 10 16 1190 121 295 353 31 38 Yes 1190 121 272 353 28 38 Yes - - - - 1200122295 353 Yes 12 16 39 - - - - - - 1200 122 272 353 28 38 Yes - - - - - - - - EDS-G-1114MECHANICAL PROPERTIES OF STEEL NUTS PAGE: 3/7 ISSUED DATE: 2002.11. 20 REVISED DATE: 200
12、6. 06. 19 VERSION: 3 GM DAEWOO Auto & Technology Table 2 MechanicalpropertiesofLowNutsMetric coarse screw threads Metric fine screw threads Hardness HardnessNominal diameter HV HRC HV Property class of Low nut Over To Proof load stress * (1) Min Max Min Max Quench & TemperProof load stress * (1) Min
13、 Max Quench & Temper- 7 - - - - 04 7 39 380 38.7 188 302 - 30 None 380 38.7 188 302 None - 7 - - - - 05 7 39 500 51.0 272 353 27.8 36 Yes 500 51.0 272 353 Yes *(1) N/mm2 kgf/mm2 Notes (1) During test, there shall be no damages or defects to the nut or its screw thread, and the nut shall resist the l
14、oad which generates the stress. When the load is removed, the nut shall be able to be removed from the mandrel with a finger. (2) Quenching and tempering may be conducted. 2.2. Symbols for property class 2.2.1. High nut Nuts with nominal diameter of 0.8d or larger (complete thread length 0.6 d or ab
15、ove). It is indicated by the maximum property class of the bolt that can be used in combination. 2.2.2. Low nut Nuts with nominal diameter of 0.5d to below 0.8d (complete thread length 0.4d to below 0.6 d or above). It is indicated by two figures as follows. EDS-G-1114MECHANICAL PROPERTIES OF STEEL
16、NUTS PAGE: 4/7 ISSUED DATE: 2002.11. 20 REVISED DATE: 2006. 06. 19 VERSION: 3 GM DAEWOO Auto & Technology Table 3 Property class and proof load stress of Low nuts Property class Nominal proof load stress N/mm2Actual proof load stress N/mm204 400 380 05 500 500 ex) 0 4(5)0 It indicates that the load
17、resisting capacity of the bolt & nut assembly is lower than that of the nut and hardness mandrel combined and also lower than that of the bolt & nut assembly shown in Table 3. This corresponds to 1/100 of the nominal proof load stress expressed in N/mm2. 4(5) Size of nominal proof load stress by har
18、dness mandrel 3. MATERIAL The chemical composition of nuts by strength class shall conform to Table 4. Table 4 Chemical composition of materialProperty class Chemical composition Type of nuts Coarse screw threads Fine screw threads C Max. Mn Min. P Max. S Max. 4(3) - 5(3) - 6(3) 6 0.50 - 0.110 0.150
19、 8 8 9 - 0.58 0.25 0.060 0.150 10(4) 10(4) 0.58 0.30 0.048 0.058 High nut 12(4) 12(4) 0.58 0.45 0.048 0.058 04(3) 04(3) 0.58 0.25 0.060 0.150 Low nut 05(4) 05(4) 0.58 0.30 0.048 0.058 EDS-G-1114MECHANICAL PROPERTIES OF STEEL NUTS PAGE: 5/7 ISSUED DATE: 2002.11. 20 REVISED DATE: 2006. 06. 19 VERSION:
20、 3 GM DAEWOO Auto & Technology Notes (3) For the property classification, free-cutting steel may be used. The maximum content of the Sulfur(S), Phosphorous(P) and lead(Pb), however, shall conform to the following. S : 0.34% P : 0.11% Pb : 0.35% (4) Other elements may be added upon necessity to enhan
21、ce the mechanical property of the nut. 4. INDICATING PROPERTY CLASS Property class of nuts according to mechanical properties shall conform to Table 5. Table 5 High nuts Low nut Property class 4 5 6 8 9 10 12 04 05 Code 4 5 6 8 9 10 12 04 05 Remark Indication of the products shall be determined by a
22、n agreement between the parties. 5. TESTING Tests for mechanical properties shall conform to Table 2. Table2 Test items Mechanical properties Related clause Proof load test Proof load test 4.2.1 of KS B 0234. Hardness test Hardness 4.2.2 of KS B 0234. EDS-G-1114MECHANICAL PROPERTIES OF STEEL NUTS PA
23、GE: 6/7 ISSUED DATE: 2002.11. 20 REVISED DATE: 2006. 06. 19 VERSION: 3 GM DAEWOO Auto & Technology Appendix Table 1 Height of high nuts(Type 1 and 2) Unit: mm Nut height TYPE 1 TYPE 2 Nominal diameter Distance between opposite sides Min. Max. m Max./ d Min. Max. m Max./ d M5 8 4.4 4.7 0.94 4.8 5.1 1
24、.02 M6 10 4.9 5.2 0.87 5.4 5.7 0.95 M7 11 6.14 6.5 0.93 6.84 7.2 1.03 M8 12 6.44 6.8 0.85 7.14 7.5 0.94 M10 14 8.04 8.4 0.84 8.94 9.3 0.93 M12 17 10.37 10.8 0.90 11.57 12 1.00 M14 19 12.1 12.8 0.91 13.4 14.1 1.01 M16 22 14.1 14.8 0.92 15.7 16.4 1.02 M18 24 15.1 15.8 0.88 16.9 17.6 0.98 M20 27 16.9 1
25、8 0.90 19 20.3 1.02 M22 30 18.1 19.4 0.88 20.5 21.8 0.93 M24 32 20.2 21.5 0.90 22.6 23.9 1.00 M27 36 22.5 23.8 0.88 25.4 26.7 0.99 M30 41 24.3 25.6 0.85 27.3 28.6 0.95 M33 46 27.4 28.7 0.87 30.9 32.5 0.98 M36 50 29.4 31 0.86 33.1 34.7 0.96 M39 55 31.8 33.4 0.86 35.9 37.5 0.96 EDS-G-1114MECHANICAL PR
26、OPERTIES OF STEEL NUTS PAGE: 7/7 ISSUED DATE: 2002.11. 20 REVISED DATE: 2006. 06. 19 VERSION: 3 GM DAEWOO Auto & Technology Appendix Table 2 Use of type 1 and 2 nutsNominal diameter Type of nuts Property class Over To Heat treatment 4 M16 M39 No quenching or tempering 5 - M39 No quenching or tempering 6 - M39 No quenching or tempering - M16 No quenching or tempering 8 M16 M39 Quenching, tempering 10 - M39 Quenching, tempering TYPE 1 12 - M16 Quenching, tempering 8 M16 M39 No quenching or tempering 9 - M16 No quenching or tempering TYPE 2 12 - M39 Quenching, tempering
