What is the difference between Q195, Q215, Q235, Q255 and Q275

What is the difference between Q195, Q215, Q235, Q255 and Q275 in terms of materials? To

Carbon structural steel is the most widely used and the largest quantity of steel. It is often rolled into steel, profiles and profiled materials. Generally, it is used directly without heat treatment, and is mainly used for general structures and engineering. To
Q195, Q215, Q235, Q255 and Q275 respectively represent the grades of steel. The grades of steel are represented by the letter (Q) representing the yield point, the value of the yield point, the quality, the quality and other symbols (A, B, C, D) deoxidation method symbols The four parts are composed in order. In terms of chemical composition, low-carbon steel grades Q195, Q215, Q235, Q255 and Q275 are large, and the higher the carbon content and manganese content, the more stable the plasticity. In terms of mechanical properties, the above grades indicate the yield point of steel with a thickness of ≤16mm. Its tensile strengths are: 315-430, 335-450, 375-500, 410-550, 490-630 (obN/mm2); qi’s elongation rates are: 33, 31, 26, 24, 20 ( 0.5%). Therefore, when introducing steel to customers, remind customers to choose different materials according to the required product material, so as not to affect product quality. To

What is the difference between the materials of Q235A and Q235B? To

The steels of Q235A and Q235B are all carbon steels. In the national standard GB700-88, the material distinction between Q235A and Q235B is mainly based on the carbon content of the steel. The carbon content of the material of Q235A is between 0.14 and 0.22%; the material of Q235B is not subjected to impact experiments, but Often do temperature shock test, V-notch. Relatively speaking, the mechanical properties of steel made of Q235B are far superior to those of steel made of Q235A. Under normal circumstances, steel mills will mark the finished products on the identification plate before leaving the factory. The user can judge whether the material is Q235A, Q235B, or other materials on the identification plate. To

Japanese steel grades have SPHC, SPHD, etc. What do they mean? To

In the grades of Japanese steel (JIS series), ordinary structural steel is mainly composed of three parts: The first part represents the material, such as S (Steel) for steel, and F (Ferrum) for iron. The second part represents different shapes, types, and uses, such as P (plate) for plates, T (tube), K (kogu) for tools. The third part shows the characteristic numbers, generally the lowest tensile strength. For example: ss400-the first s means steel (Ssteel), the second s means “Structuree”, 400 is ordinary structural steel with an offline resistance of 400Mpa. Among them: sphc-the abbreviation of the first S Steel Steel, P is the abbreviation of Pate, H is the abbreviation of Heat, and the abbreviation of Commercial, which means that hot rolled and steel strip are generally used as a whole. To

SPHD—– stands for hot-rolled steel sheet and steel strip for stamping. To
SPHE—— stands for hot-rolled steel sheet and steel strip for deep drawing. To
SPCC—— means that cold-rolled carbon steel sheets and steel strips are generally used, which is equivalent to China’s Q195-215A grades. Among them, the third letter C is the abbreviation of Cold, and it is necessary to ensure that T is added to the end of the grade during the tensile test to be SPCCT. To
SPCD—— stands for cold-rolled carbon steel and steel strip for punching, which is equivalent to China 08AL (13237) high-quality carbon structural steel. To
SPCE—— stands for cold-rolled carbon steel sheet and strip for deep drawing, which is equivalent to China 08AL (5213) punching steel. When it is necessary to ensure non-effectiveness, add N to the end of the grade to indicate SPCEN. To

The code of cold-rolled carbon steel sheet and strip, the annealing state is A, the standard quenching and tempering is S, 1/8 hard is 8, 1/4 hard is 4, and 1/2 hard is 2. To
Surface processing code: D for matt finish rolling and B for gloss finish rolling. For example, SPCCT-SD means cold-rolled carbon sheet with standard quenching and tempering and matt finish rolling. Another example is SPCCT-SB, which means cold-rolled carbon sheet with standard quenching and tempering, bright processing and mechanical properties.