Tiêu chuẩn quốc tế

• Số hiệu / Standard Number: ASTM A618-01
• Năm ban hành / Publication date: 2001
• Tình trạng / Status: W - Hết hiệu lực
• Tên tiếng Anh / Title in English: Standard Specification for Hot-Formed Welded and Seamless High-Strength Low-Alloy Structural Tubing
• Số trang / Page: 4
• Phạm vi áp dụng / Scope of standard: 1.1 This specification covers grades of hot-formed welded and seamless high-strength low-alloy square, rectangular, round, or special shape structural tubing for welded, riveted, or bolted construction of bridges and buildings and for general structural purposes. When the steel is used in welded construction, the welding procedure shall be suitable for the steel and the intended service. 1.2 Grade II has atmospheric corrosion resistance equivalent to that of carbon steel with copper (0.20 minimum Cu) Grades Ia and Ib have atmospheric corrosion resistance substantially better than that of Grade II (Note 1). When properly exposed to the atmosphere, Grades Ia and Ib can be used bare (unpainted) for many applications. When enhanced corrosion resistance is desired, Grade III, copper limits may be specified. Note 1--For methods of estimating the atmospheric corrosion resistance of low alloy steels see Guide G101 or actual data.1.3 The values stated in inch-pound units are to be regarded as the standard.