ASTM A192 tube is one of our main products, we have good reputation and good price advantage in this standard tube. This is Standard Specification for Seamless Carbon Steel Boiler Tubes for High-Pressure Service. For the Grade and Chemical Compositon and Mechanical Properties for ASTM A192, please see the attached picture. Thanks. If you need more information, please do not hesitate to contact us with any questions or concerns anytime. Thank you so much for your enquiry.