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常用五金螺丝材料(Common hardware screw material)

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常用五金螺丝材料(Common hardware screw material)常用五金螺丝材料(Common hardware screw material) 常用五金螺丝材料(Common hardware screw material) Fastener material Material requirements for bolts, screws and studs (GB/T3098.1-2000), performance grades, materials and heat treatment, chemical composition,% tempering tempe...

常用五金螺丝材料(Common hardware screw material)
常用五金螺丝材料(Common hardware screw material) 常用五金螺丝材料(Common hardware screw material) Fastener material Material requirements for bolts, screws and studs (GB/T3098.1-2000), performance grades, materials and heat treatment, chemical composition,% tempering temperature C Min C P Max S Max B1) Max Min max 3.62) carbon steel - 0.20, 0.05, 0.06, 0.003 - 4.62) - 0.55, 0.05, 0.06, 0.003 - 4.82) 5.6, 0.13, 0.55, 0.05, 0.06, 0.003 -- 5.82) - 0.55, 0.05, 0.06 6.82) (align=center>8.83) low carbon alloy steels (such as boron, manganese or chromium), Quenched and tempered or medium carbon steel, Quenched and tempered 0.154) 0.04, 0.035, 0.035, 0.003425 0.25, 0.55, 0.035, 0.035 9.8 low carbon alloy steels (such as boron, manganese or chromium), Quenched and tempered or medium carbon steel, Quenched and tempered 0.154) 0.35, 0.035, 0.035, 0.003425 0.25, 0.55, 0.035, 0.035 10.95) (6) low carbon alloy steels (such as boron, manganese or chromium), Quenched and tempered 0.154) 0.35, 0.035, 0.035, 0.003340 10.96) in carbon steel, quenching and tempering, or low carbon steel (such as boron, manganese or chromium), quenching and tempering steel or alloy quench and tempering 7) 0.25 0.204) 0.55 0.55, 0.035 0.035, 0.035 0.035, 0.03425 0.20, 0.55, 0.035, 0.035, 0.003 10.96) 8) 9) quenched and tempered 7) 0.28, 0.50, 0.035, 0.035, 0.003380 1) the content of boron can reach 0.005%, and the non effective boron can be controlled by adding titanium and / or aluminum. 2) these grades allow for easy cutting. The maximum content of sulfur, phosphorus and lead is 0.34%, phosphorus 0.11%, and lead 0.35%. 3) in order to ensure good hardenability, fasteners with thread diameters exceeding 20mm shall be made of steel specified in grade 10.9. 4) the minimum manganese content of low carbon alloy steels with carbon content below 0.25% (barrel sample analysis) is: 8.8: 0.6%; 9.8, 10.9 and 10.9: 0.7%. 5) the product shall be marked with a horizontal line under the performance level code. Class 10.9 of grade 10.9 performance shall comply with all regulations, and low temperature on the fire along in mock temperature conditions will cause stress weakened in different degree. 6) the material used for this performance rating shall have a good hardenability to ensure that the core of the threaded section of the fastener obtains about 90% of the martensite microstructure after quenching and tempering. 7) alloy steel should contain at least one of the following elements, the minimum content is: chromium 0.30%; nickel 0.30%; molybdenum 0.20%; vanadium 0.10% 8) consider under tensile stress, the surface level 12.9 is not allowed to have white phosphorus accumulation layer of gold phase can measure. 9) the chemical composition and tempering temperature are still under investigation. Two, nut Material requirements for 1. nuts (fine thread) (GB/T3098.2-2000) Performance grade, chemical composition,% C Max Mn Min P Max S Max 41), 51) (61) - 0.50 - 0.060, 0.150 8, 9041) 0.58, 0.25, 0.060, 0.150 102) 051) 0.58, 0.30, 0.048, 0.058 122) - 0.58, 0.45, 0.048, 0.058 1) the grade of performance can be made from easy to cut steel (except otherwise agreed by both suppliers and suppliers), the maximum content of sulfur, phosphorus and lead is 0.30%, phosphorus 0.11%, lead 0.35%. 2) in order to improve the mechanical properties of nuts, alloy elements can be added if necessary. The performance grades are 05, 8 (>M16 type L nut), and 10 and 12 grade nuts shall be quenched and tempered. Material requirements for 2. nuts (fine thread) (GB/T3098.4-2000) Performance grade chemical composition:% C Mn Min P Max S Max 51), 6 - 0.50 - 0.060, 0.150 82) 041) 0.58, 0.25, 0.060, 0.150 102) 052) 0.58, 0.30, 0.048, 0.058 122) - 0.58, 0.45, 0.048, 0.058 1) the grade of performance can be made from easy to cut steel (except otherwise agreed by both suppliers and suppliers), the maximum content of sulfur, phosphorus and lead is 0.34%, phosphorus 0.11%, lead 0.35%. 2) in order to improve the mechanical properties of nuts, alloy elements can be added if necessary. Performance grades of 05, 8 (L type), and 10 and 12 grade nuts shall be quenched and tempered. 3. rivet nut material (GB/T17880.6-1999) Product material standard number Steel flat head, countersunk head, small countersunk head, 1200 small countersunk head and flat head, six angle rivet nut, 08F, GB/T699 ML10 GB/T6478 Aluminum alloy flat head and countersunk head rivet nut 5056 (original LF5-1) GB/T3190 6061 (original LD30) 4. material requirements of effective torque steel six angle locking nut (GB3098.9-93) The material for making the nut body shall be the same as the material of the nut (coarse thread). A material for making metal or nonmetallic inserts; determined by the manufacturer. Three. Material requirements for fastening screws (GB/T3098.3-2000) Performance level Material Science heat treatment Chemical composition,% C P Max S Max Min max 14H Carbon steel 1) 2 - Zero point five zero - Zero point one one Zero point one five 22H Carbon steel 3) Quenching and tempering Zero point five zero - Zero Point Zero Five Zero Point Zero Five 33H Carbon steel 3) Quenching and tempering Zero point five zero - Zero Point Zero Five Zero Point Zero Five 45H Alloy steel 3) 4 Quenching and tempering Zero point five zero Zero point one nine Zero Point Zero Five Zero Point Zero Five 1) the main content of lead, phosphorus and sulfur is 0.35% of lead, 0.11% of phosphorus and 0.34% of sulfur 2) head screws allow surface hardening. Performance grades of 05, 8 (L type), and 10 and 12 grade nuts shall be quenched and tempered. 3. rivet nut material (GB/T17880.6-1999) Product material standard number Steel flat head, countersunk head, small countersunk head, 1200 small countersunk head and flat head, six angle rivet nut, 08F, GB/T699 ML10 GB/T6478 Aluminum alloy flat head and countersunk head rivet nut 5056 (original LF5-1) GB/T3190 6061 (original LD30) 4. material requirements of effective torque steel six angle locking nut (GB3098.9-93) The material for making the nut body shall be the same as the material of the nut (coarse thread). A material for making metal or nonmetallic inserts; determined by the manufacturer. Three. Material requirements for fastening screws (GB/T3098.3-2000) Performance level Material Science heat treatment Chemical composition,% C P Max S Max Min max 14H Carbon steel 1) 2 - Zero point five zero - Zero point one one Zero point one five 22H Carbon steel 3) Quenching and tempering Zero point five zero - Zero Point Zero Five Zero Point Zero Five 33H Carbon steel 3) Quenching and tempering Zero point five zero - Zero Point Zero Five Zero Point Zero Five 45H Alloy steel 3) 4 Quenching and tempering Zero point five zero Zero point one nine Zero Point Zero Five Zero Point Zero Five 1) the main content of lead, phosphorus and sulfur is 0.35% of lead, 0.11% of phosphorus and 0.34% of sulfur 2) head screws allow surface hardening. 2) the material of the stress sleeve is recommended to be the same material as the stud. 2. material should be examined by low magnification. Among them, the general loose, central loose and box shape segregation shall not exceed the grade two stipulated by GB1979. Five, stainless steel fasteners materials, technical requirements Bolts, screws and studs (3098.3-2000), nuts (3098.15-2000), locking screws (3098.16-2000) The stainless steel suitable for fasteners produced in accordance with the relevant national standards is given in table 1. Unless otherwise agreed between the supplier and the buyer, the chemical composition shall be chosen by the manufacturer within the limits specified by the steel group. In the case of intergranular corrosion, it is recommended to perform tests in accordance with ISO3651-1 or ISO3651-2 regulations. In this case, stable A3 and A5 are recommended, or A2 and A4 stainless steels with carbon content of not more than 0.03% shall be recommended. Table 1 Stainless Steel Group and chemical composition Class level, chemical composition 1)% note C, Su, Mn, P, S, Cr, Mo, Ni, Cu Austenitic A1 0.121, 6.5, 0.2, 0.15-0.35, 16-19, 0.7, 5-10, 1.75-2.25, 2), 3) and 4) A2, 0.112, 0.05, 0.053, 15-20 - 5 - 8) 8-1947) A3, 0.0812, 0.045, 0.03, 17-195) 9-1219) A4, 0.0812, 0.045, 0.03, 16-18.5, 2-3, 10-1518) 10) A5, 0.0812, 0.045, 0.03, 16-18.5, 2-3, 10.5-14, 19), 10) Martensite, C1, 0.09-0.15, 110.05, 0.03, 11.5-14, 1 - 10) C3 0.17-0.25 110.04, 0.03 16-18> - 1.5-2.5- C4 0. 1) steels made from different smelting and casting methods can also be used. 2) "brand" column of each banner listed in a variety of materials, can be universal. The above reference material is from the solid screw www.cgwujin.com
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