《JIS-B-1179-1994-R2005-ENG.pdf》由会员分享，可在线阅读，更多相关《JIS-B-1179-1994-R2005-ENG.pdf（19页珍藏版）》请在三一文库上搜索。
1、J I S B*1177 94 4933608 0531149 T5T UDC 621.882.6 JAPAN ESE INDUSTRIAL STANDARD Flat head bolts JIS B 1179-194 Translated and Published by Japanese Standards Association Printed in Japan 10 s Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/111111
2、1001, User=Wing, Bernie Not for Resale, 03/15/2007 07:45:26 MDTNo reproduction or networking permitted without license from IHS -,-,- J I S Br1179 94 m q933608 0531150 771 m In the event of any doubt arising, the original Standard in Japanese is to be final authority. Copyright Japanese Standards As
3、sociation Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/15/2007 07:45:26 MDTNo reproduction or networking permitted without license from IHS -,-,- J I S BxLL79 94 4933608 053LL5L 608 Classifi- cation JAPANESE INDUSTRIAL STANDARD Flat he
4、ad bolts Division by material UDC 621.882.6 J I S B 1179-1994 Tolerance class of screw thread 1. Scope steel, hereafter referred to as “steel bolts“, flat head bolts made of stainless steel, hereafter referred to as “stainless steel bolts“ and flat head bolts made of brass, hereafter referred to as
5、“brass bolts“ for general use. This Japanese Industrial Standard specifies flat head bolts made of Strength class Remarks 1. In this Standard, the steel bolts, stainless steel bolts and brass bolts are generically referred to merely as the “bolts“. Slotted flat head bolt Flat head bolt with a revers
6、e key 2. The standards cited in this Standard are shown in Attached Table 4. Steel Stainless steel Brass Steel Stainless steel 2. Classification head bolts and flat head bolts with rev erse key. The bolts shall be classified into two classes, slotted flat 3. Grade with the finish, tolerance class of
7、 screw thread and strength class of mechanical properties given in Table 1. The bolts shall be graded by the material of the products combined Table 1. Grade of bolts Brass Finish Fine, Rough Rough Grade Column I Quality 3 I I- Quality 3 Column II 4T - 4T Remarks: The tolerance classes of screw thre
8、ads and the strength class of mechanical properties shown in Column I shall have priority. However, those in Column I and Column II may be combined each other. 6g or quality 2 shall apply unless otherwise specified for the tolerance class of screw threads. Copyright Japanese Standards Association Pr
9、ovided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/15/2007 07:45:26 MDTNo reproduction or networking permitted without license from IHS -,-,- J I S B*LL79 94 m 4933608 053LL52 544 m Strength class Tensile strength P) Minimum value 2 B 1179-199
10、4 4.6 4.8 4 T M O 420 392 4. Mechanical properties as follows: The mechanical properties of the bolts shall be Brinell hardness HB Rockwell hardness HRB (i) The mechanical properties of the steel bolts shall comply with Table 2. However, this table shall not apply to the bolts of which weldability,
11、corrosion resistance, heat resistance to 300C or above (250C or above for free cutting steel) and low-temperature resistance to -50C or below are required. Minimum value 114 124 105 Maximum value 238 229 Minimum value 67 71 Maximum value 99.5 - Table 2. Mechanical properties Yield point or yield str
12、ength (2) Minimum value 340 (Referece) 226 N/mm2 Hard- ness b o f load stress Elongation after rupture z I N/mmz 225 310 Minimum value 22 14 10 (Reference) Tensile strength of the key Impact strength of the head Equal to the minimum value of tensile strength (9 ND fissure ahall D c N r at the root b
13、etween the head and the cylindrical part (1. (2) The yield point shall apply if it is definite. If it is indefinite, the yield strength with 0.2% of permanent elongation shall apply. (3) The bolts shall withstand a load equal to the minimum value of tensile strength. Breakage may occur at the thread
14、ed part or the cylindrical part but it shall not occur at the root between the head and the cylindrical part. (4) In the case of fully threaded bolts, fissures shall not occur at the root between the head and the shank part even if fissures may occur at the first thread on the head part. (2) The mec
15、hanical properties of stainless steel and brass bolts shall be agreed upon between the purchaser and the manufacturer. Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/15/2007 07:45:26 MDTNo reprodu
16、ction or networking permitted without license from IHS -,-,- J I S B*3379 94 D 4933608 0533353 Y80 D Finish Fine Rough Rough 3 B 1179-1994 Shape and dimensions Attached Table 1-1 Attached Table 1-2 Attached Table 2 5. Shape and dimensions comply with Table 3. The shape and dimensions of the bolts sh
17、all Classification of bolt Slotted flat head bolt Table 3. Shape and dimensions Screw thread Class Tolerance class JIS B 0205 Column I 6g and 8g in JIS B 0209 Quality 2 and Quality 3 in JIS B 0209 Column II classification Flat head bolt with a reverse key Slotted flat head bolt JIS B 0207 Column I 6
18、g and 8g in JIS B 0211 Quality 2 and Quality 3 in JIS B 0211 Column II Flat head bolt with a reverse key Range of nominal diameter mm 10 to 36 10 to 24 6. Screw threads 4-1, and the pitches with Table 4-2. The screw threads of the bolts shall comply with Table The maximum permissible dimensions of p
19、lated threads shall be the maxi- mum permissible dimensions of 4h or quality 1 external threads. However, the accuracy of threads which are hot-dip zinc-coated shall be determined according to the agreement between the purchaser and the manufacturer. Table 4-1. Screw threads I I I Table 4-2. Pitch U
20、nit: mm of mew thread I 10 1 12 1 (14) I 16 1 (18) 1 20 I (22) 1 24 I 30 1 36 I Remarks 1. 2. The nominal diameters of screw threads in parentheses shall not be used as far as possible. When the pitches of fine threads other than those given in Table 4-2 are required, the pitches specified in JIS B
21、0207 may be used. Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/15/2007 07:45:26 MDTNo reproduction or networking permitted without license from IHS -,-,- J I S B*1179 94 m 4933b08 0531154 317 Ro
22、ugh 4 B 1179-1994 The surface roughness is not specified but the shape and dimensions shall comply with Attached Table 1-2 and Attached Table 2. 7. Appearance The surface roughness of the bolts shall comply with the requirements in Table 5. Further, the bolts shall be free from surface defects such
23、as cracks and harmful flaws and burrs in use. The standard limit of surface defects should preferably conform to JIS B 1041, unless otherwise required. 8. Materials The materials of the bolts shall be as follows: (i) The material of steel bolts shall be carbon steels of which the products satisfy th
24、e mechanical properties specified in 4. (2) The material of stainless steel bolts shall, as a rule, comply with JIS G 4303 or JIS G 4315. (3) The material of brass bolts shall, as a rule, comply with JIS H 3250 or JIS H 3260. 9. Surface treatment treatment. However, plating or other surface treatmen
25、ts shall be specified if required. Steel bolts electroplated shall be treated to eliminate brittleness as required. The bolts shall, in general, not be subjected to surface 10. Finish The bolts shall be finished as specified in Table 5 Table 5. Finish Classification I Finish Fine The surface roughne
26、ss ( 5 ) of the bearing surface, shank and top surface of the head shall be 25 pmR, and the shape and dimensions shall comply with Attached Table 1-1. I I If surface roughness complies with the requirements in Table 5, discoloration due to heat treatment may remain on the surface. 11. Inspections Th
27、e bolts shall be inspected as described below. However, the sampling method in the lot inspection shall be agreed upon between the purchaser and the manufacturer. (i) Inspection of mechanical properties The mechanical properties of steel bolts shall be inspected in accordance with Table 6. Results o
28、f the inspec- tion shall satisfy the requirements in 4.(1). Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/15/2007 07:45:26 MDTNo reproduction or networking permitted without license from IHS -,-,
29、- J I S B+1179 94 = 4933b08 0531155 253 Strength class Mechanical properties 4.6, 4.8 Tensile strength Hardness 5 B 1179-1994 Test method Conform to 4.2.2 in JIS B 1051 Conform to 4.2.5 in JIS B 1051 Proof load stress Key tensile strength Conform to 4.2.4 in JIS B 1051 Conform to 4.2.3 in JIS B 1051
30、 4T Remarks 1. The mechanical properties for the strength classes 4.6 and 4.8 are based on the inspection program B specified in 5.1 of JIS B 1051. Conform to 3.2.2 of Annex in JIS B 1051 Tensile strength Conform to 3.2.4 of Annex in JIS B Hardness 105 1 The hardness inspection may be omitted for bo
31、lts which have been subjected to the tensile strength inspection or key tensile strength inspection. However, when the tensile tests cannot be conducted for dimensional reasons and others, the hardness inspection shall be conducted for determination. The bolts which have been inspected for the key t
32、ensile strength, the inspection of tensile strength may be omitted. 2. For bolts of the strength classes 4.6 and 4.8, the inspection program B may be replaced by the inspection program A specified in 5.1 of JIS B 1051. In this case, tensile strength, yield point (or yield strength), elongation after
33、 breakage and impact strength of the head shall comply with the requirements in Table 2. 3. The mechanical properties for the strength class 4T are based on the inspection program specified in 4.1 of Annex in JIS B 0151. when tension tests cannot be conducted for dimensional reasons and others, the
34、hardness inspection shall be conducted for determination. However, 4. The hardness shall be either the Brinell hardness or the Rockwell hardness. Other types of hardness shall be agreed upon between the purchaser and the manufacturer. 5. By the agreement between the purchaser and the manufacturer, t
35、he inspection of mechanical properties to be conducted at the delivery of the products may be partly omitted by confirmation of test results or others. (2) Inspection of shape and dimensions The shape and dimensions shall be inspected by direct measurement, limit gauges and other methods. Results of
36、 the inspection shall satisfy the requirements in 5. Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/15/2007 07:45:26 MDTNo reproduction or networking permitted without license from IHS -,-,- J I S
37、 B*1179 94 = 4933608 0531156 19T Classification 6 B 1179-1994 Applicable Standards for limit gauges for screw threads (3) Inspection of screw thread The screw thread shall be inspected with the limit gauges in Table 7 or alternative screw thread inspection instruments. Results of the inspection shal
38、l satisfy the requirements in 6. Metric coarse threads Metric fine threads Go screw thread ring gauges for plated screw threads shall be of 4h or quality 1. JIS B 0251 JIS B 0252 (4) Inspection of appearance The appearance shall be visually inspected and results of the inspection shall satisfy the r
39、equirement in 7. However, the surface roughnes; shall be inspected by means of the roughness comparison specimen (see JIS B 0659) or surface roughness measuring instruments (see JIS B 0651). 12. Designation designation of screw thread x nominal length (I), tolerance class of screw thread, strength c
40、lass of mechanical properties, material and specified items (7). How- ever, the material shall be excluded from the designation for steel bolts and the strength class of mechanical properties shall be excluded from the designation for stainless steel bolts and brass bolts. The bolts shall be designa
41、ted by JIS number (6), class, finish, Notes (6) The JIS number may be omitted unless especially required. (7) As for the “specified items“, the shape of screw thread end, length of screw threaded part, type of plating, etc. shall be shown as required. When the length of screw threaded part is specif
42、ied, the value shall be indicated in parentheses after symbol 1. Example: JIS B 1179 Slotted Fine Mi0 x 50 (35) - 6g 4.8 flat head bolt Flat head bolt with a reverse Round Rough M16 x 80 - 3 C270-W point U - II II Il Il (JIS number) (Class) (Finish) r n h II) II) U RI c (Material) (Specified item) C
43、opyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/15/2007 07:45:26 MDTNo reproduction or networking permitted without license from IHS -,-,- J I S BXLL79 94 = 4933608 053LL57 O26 W 7 B 1179-1994 13. M
44、arking following particulars: The outer surface of a bolt package shall be marked with the (i) Class (2) Finish (3) Designation of screw thread x E (when the length of screw threaded part differs from Attached Table 3, the value shall be indicated in parentheses after symbol E . ) Tolerance class of
45、 screw thread (4) (5) (6) Material (8) Strength class (for steel bolts) (7) Specified items (8) Quantity (9) Manufacturers name or abbreviation Note (8) The material may be marked by the general description. Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS
46、Employees/1111111001, User=Wing, Bernie Not for Resale, 03/15/2007 07:45:26 MDTNo reproduction or networking permitted without license from IHS -,-,- 8 B 1179-1994 I ds Designation of screw thread Attached Table 1-1. Slotted flat head bolt, fine finished dk I dkI k ICI 0 I n t Iz/ E Rat point (d) Co
47、arse , Fine M 10 M 10X1.25 Eccentricity Eccentricity Inclination of uu I Y and 8F - T z . Toler- : : & . Toler- (Max.) 10 O 20 O 21 5.5 0.5 qyfy 2 +0.25-2.5 f0.3 1.5 0.35 E ez- Toler- Basic Toler- (Refer- a BIon ance 2- ance ence) (Max.) v mon ance S I O ance s O -0.2 -0.35 O 4k Unit: mm M 12 I M 12
48、X1.25 Remarks 1. Designation of the screw thread given in parentheses shall not be used as far as possible. 2. The nominal length (0, screw thread part length (b) and length (x) of in- complete screw threaded part shall be in accordance with Attached Table 3. 3. The end of screw thread shall be flat chamfered or round chamfered. If either of them is necessary, it shall be so specified. G (Max.) 1“ Copyright Japanese Standards Association Provided by IHS under license