普通螺栓一般用普通碳素結構鋼制造，不經熱處理，高強螺栓一般用碳素結構鋼或合金結構鋼制造，需要經過調質熱處理提高綜合機械性能。高強度分為，8.8級，10.9級，12.9級。從強度等級:高強螺栓常用8.8S和10.9S兩個強度等級。
Ordinary bolts are generally made of ordinary carbon structural steel without heat treatment. High strength bolts are generally made of high-quality carbon structural steel or alloy structural steel. They need to be quenched and tempered heat treatment to improve their comprehensive mechanical properties. High strength is divided into grade 8.8, grade 10.9 and grade 12.9. From strength grade: high strength bolts usually have two strength grades: 8.8s and 10.9s.
普通螺栓一般有4.4級，4.8級5.6級8.8級。從受力特點高強螺栓施加預拉力和靠摩擦力傳遞外力，普通螺栓靠栓桿抗剪力和孔壁承壓來傳遞剪力。鋼結構螺栓有兩種連接方法，一種是高強度螺栓冷加工連接方法，另一種就是高強度螺栓熱加工連接的方法。、
Ordinary bolts generally have grade 4.4, grade 4.8, grade 5.6 and grade 8.8. From the stress characteristics, high-strength bolts exert pretension and transmit external force by friction, while ordinary bolts transmit shear by bolt rod shear resistance and hole wall pressure. There are two connection methods for steel structure bolts, one is the cold working connection method of high-strength bolts, and the other is the hot working connection method of high-strength bolts.
我們在生產加工的時候可以按照使用的時候不同的要求來做選擇，冷加工連接是剛性的連接，而熱加工連接的是柔性連接。
We can choose according to different requirements during production and processing. Cold working connection is rigid connection, while hot working connection is flexible connection.
