The excessive standard of 20MnG seamless steel pipe and tube is GB/T 5310, which is applicable to the manufacture of seamless steel tubes for steam boilers and pipes with high pressure and above. The size, shape, weight, technical requirements, sample, test method, inspection rules, packaging, marking and quality certificate of 20MnG seamless steel pipe and tube should meet demands of GB/T 5310 standard.

GB/T 5310 20MnG seamless steel pipe and tube chemical composition:

GB/T 5310 20MnG seamless steel pipe and tube mechanical properties:

GB/T 5310 20MnG seamless steel pipe and tube needs to be normalized at 880-940℃. The 20MnG seamless steel pipe is normally supplied within 4000mm - 12000mm in length. After negotiation between the 20MnG steel tube supplier and the buyer, the 20MnG steel tube length can also be longer than 12000mm or shorter than 4000mm but not shorter than 3000mm, and the quantity of 20MnG seamless steel pipes with 3000-4000mm length shall not exceed 5% of the total quantity of 20MnG steel pipes delivered in this batch. It should be indicated in the contract.