Q235 steel is a Chinese GB standard plain carbon structural steel, and divided into 4 quality grades: Q235A, Q235B, Q235C and Q235D, material density is 7.85 g/cm3, tensile strength is from 370 to 500 MPa, and yield strength is 235 MPa (data are for steel bar or steel plate diameter 16mm). The latest standard of steel Q235 is GB/T 700 2006.
Q235 Steel Plate Equivalent Steel Standard-ASTM A36 A36 steel plate is similar to Q235B steel plate, it is one Q235b equivalent steel standard, another one is SS400. While the difference between A36 and Q235B is as .
However, for stability control design, Q235 steel is better. The price difference is 3%- 8%. Regarding how to distinguish the steel plate from Q235 and Q345, therere several methods: Distinguish Q345 and Q235 A method: There are two kinds of materials that can be roughly differentiated by test welding.
ASTM A36 Equivalent Grade. ASTM A36 steel equivalent to ISO, European EN (Germany DIN, British BSI, France NF), Japanese JIS and Chinese GB standard. (For reference) US ASTM A36 vs European S235, Chinese Q235, Japanese SS440 and Indian E250 Steel.
Q235 steel is equivalent to Japenese steel grade SS400 in application, the only difference is that ss400 steel requires only S,P composition < 0.050, Q235 has requirements for More element C, Si, Mn, S, P. Yield strength of q235 is >235Mpa, which is almost the same to SS400 245Mpa. Q represents the yield of this material, the latter 235, refers to the yield value of this material, at about 235MPA.
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SS400 (steel for general structure) means that the general structural plate whose tensile strength is greater than 400MPa. Q235 means that the ordinary structual steel plate whose yield point is greater than 235MPa. SS400 standard number is JIS G3101. Q235 standard number is GB/T700. SS400 is a way of marking the Japanese steel, in fact, it is equivalent to the domestic Q235 steel.