There are many steel companies in the market, so the quality of 27SiMn seamless steel pipe make the people confused. Our company as a professional steel exporter in China. We have the high quality 27SiMn seamless steel pipe to meet the customers’ requirements.
The surface crack of 27SiMn seamless steel pipe is mainly caused by the deterioration of thermoplasticity of 27SiMn seamless steel pipe billet in the process of rolling pipe, while the high residual harmful element tin in the billet causes its segregation at grain boundary, which is the main reason for the reduction of thermoplasticity.
Tin is a harmful residual element in 27SiMn seamless steel pipe and is brought in by scrap, and cannot be removed by the technology of refining 27SiMn seamless steel pipe commonly used. The crack is caused by the enrichment of critical tin under the surface of iron oxide, because the tin forms a liquid phase that travels along the grain boundary, thus causing intergranular destruction and loss of plasticity within the critical temperature range.
When the content of residual harmful elements in 27SiMn seamless steel pipe is less than 0.035%, no cracking will occur. So if you have any need in 27SiMn seamless steel pipe, please contact us freely. We will reply you at first time to solve your any questions about 27SiMn seamless steel pipe.
