cold drawn seamless SRB roller burnished steel tubes manufacturers honed cylinder tubes is made of seamless cold drawn steel pipes, the cold drawn tubes can be produced according to most popular international standards such as DIN 2391, EN 10216-2, ASTM A513-5, A 519, GB/T 3639 etc on customer's request.DESCRIPTION:Material: ST52, E355, STKM13C, C20, CK45, 4140, 42
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