SA841 Gr.A Steel Plate for Pressure Vessels (ASME)

SA841 Gr.A is an American grade of pressure vessel steel plate under the ASME standard. The manufacturing specification is ASME SA-841/SA-841M, and the ultrasonic testing standard is NB/T 47013.3-2015.

This grade is a carbon-manganese pressure vessel steel offering good weldability and strength. It is available in Type I and Type II, with Type II providing higher yield and tensile strength. SA841 Gr-A Approximate Grade Lookup Table.

SA841 Gr.A steel plates are impact tested upon agreement, with titanium optionally added per design agreement.

SA841 Gr.A designation explanation: SA denotes ASME specification, 841 is the specification number, Gr.A denotes Grade A.

Professional Technical Support and Customization

Comprehensive Knowledge Base: Our sales team is proficient in mainstream domestic and international pressure vessel standards. Whether it's the American ASME standard SA841 Gr.A or other international standards, we can provide accurate technical communication.

Zero Communication Errors: With solid product knowledge, we can avoid all basic errors during the order technical condition confirmation stage, ensuring the accuracy of your order.

Flexible Customization Capabilities: The SA841 Gr.A standard allows titanium addition per design agreement and carbon equivalent control. If your design has special requirements (e.g., specific hardness, impact testing, HIC/SSC testing), we support customized production.

① Unless a minimum or range value is provided, all values are maximum values.

② Below the maximum carbon content, for every 0.01% decrease in carbon, an increase of 0.06% in manganese is permitted above the specified manganese content, up to a maximum manganese content of 1.85%.

③ If the carbon content in the smelting analysis does not exceed 0.47%, or does not exceed the value specified in Supplementary Requirement S77, the manganese content in the smelting analysis may exceed 1.35%, up to a maximum of 1.60%. When this requirement is invoked, the carbon equivalent is calculated using the following formula. CE=C+Mn/6+(Cr+Mo+V)/5+(Ni+Cu)/15%

④ Not applicable

⑤ If the total aluminum content is greater than or equal to 0.03%, or the acid-soluble aluminum content is greater than or equal to 0.025%, then the silicon content can be less than 0.04%.

⑥ Cb and Nb are the same element, their names are interchangeable, and both names can be used in the A01 standard.

⑦ Titanium may be added to steel according to the design agreement, in which case the minimum aluminum content should no longer apply. When this option is exercised, the smelting analysis content of titanium should be 0.006%-0.02%, and the actual titanium content should be reported in the test report.

⑧ Titanium may be added to steel according to the design agreement, in which case the minimum aluminum content should no longer apply. When this option is exercised, the smelting analysis content of titanium should be 0.006%-0.03%, and the actual titanium content should be reported in the test report.