What is Q195 steel?
A: Q195 is a common carbon structural steel specified in the Chinese national standard GB/T 700, belonging to the category of low-carbon steel. "Q" represents yield strength, and "195" indicates that the minimum yield strength is ≥195MPa when the thickness is ≤16mm.
What are the implementation standards for Q195?
A: The core standard is GB/T 700-2006 "Carbon Structural Steel," while steel plates/strips comply with GB/T 3274-2017.
What are the key differences between Q195, Q235, and Q355?
A: The yield strength increases sequentially (195/235/355MPa), with increasing carbon content. Q195 has the best plasticity and the lowest strength, suitable for light-load processing; Q235/Q355 have higher strength and are used for load-bearing structures.
What are the international equivalent grades of Q195?
A: The international standard is ISO HR2; the US standard is ASTM Gr.B; the Japanese standard is JIS SS330; the German standard is DIN St33/S185; the British standard is BS 040A10; and the French standard is NF A33.
Is Q195 a low-carbon steel?
A: Yes, it has a carbon content of ≤0.12%, making it a typical low-carbon steel with excellent plasticity and weldability.