The latest offer for 51 steel pipe includes grades such as Q195, Q215, Q235, Q255, and Q275. These steel grades are represented by a combination of the yield point letter (Q), the yield strength value, quality symbols (A, B, C, D), and deoxidation method symbols. The designation follows a specific order, making it easy to identify the properties of each grade.
From a chemical composition perspective, these low-carbon steel grades—Q195, Q215, Q235, Q255, and Q275—are commonly used in various industrial applications. As the carbon and manganese content increases, the steel becomes more stable in terms of plasticity and mechanical performance.
In terms of mechanical properties, these grades are defined based on their yield strength when the thickness is ≤16mm. Their tensile strengths range from 315–430 N/mm² for Q195, 335–450 N/mm² for Q215, 375–500 N/mm² for Q235, 410–550 N/mm² for Q255, and 490–630 N/mm² for Q275. The elongation values vary accordingly, with Q195 showing the highest at 33%, followed by Q215 at 31%, Q235 at 26%, Q255 at 24%, and Q275 at 20%.
When introducing steel products to customers, it's important to guide them in selecting the appropriate material based on their specific needs. Choosing the right grade ensures optimal performance and avoids potential issues that could affect product quality or structural integrity.
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