GB/T 30063 Q235B Longitudinal Submerged arc Welded Steel Tubes for Structural Purpose, ASTM A500/A500M, JIS G3444, Q235B, Q235C, Q345B, Q345C, Q390B, Q390C, Q420B, Q420C, Q460C, Q460D, Q235GJB, Q235GJC, Q345GJB, Q345GJC, Q390GJB, Q390GJC, Q420GJC

GB/T 30063 Longitudinal Submerged arc Welded Steel Tubes for Structural Purpose

Standard: GB/T 30063
Equivalent Standard: ASTM A500/A500M, JIS G3444

Material: Q235B
Equivalent Material: 1010, E235, St35.8, St37

Chemistry Composition

C, %	Si, %	Mn, %	Cr, %	Ni, %	S, %	P, %	Cu, %
0.07-0.14	0.17-0.37	0.35-0.65	0.15 max	0.30 max	0.040 max	0.035 max	0.30 max

Mechanical Properties

Tensile Strength, MPa	Yield Strength, MPa	Elongation, %
353 min	216 min	24 min

Outside Diameter & Tolerance

Outside Diameter, mm	Tolerance
32≤OD≤50	±0.5mm
51≤OD≤219	±1%

Wall thickness & Tolerance

Wall Thickness, mm	Tolerance, %
3≤OD≤15	+12.5/-15
16≤OD≤30	±12.5
32≤OD≤45	+10/-12.5

GB/T 30063 specifies the size, shape, weight, technical requirements, test methods, inspection rules, packaging, marking and quality certificate of LSAW steel pipes for structural use. GB/T 30063 is applicable to straight seam submerged arc welded steel pipes with outer diameter not less than 400mm for buildings, bridges, towers, piles, struts and other general structures. It is not applicable to steel pipes for mechanical structures.
GB/T 30063规定了结构用直缝埋弧焊接钢管的尺寸、外形、重量、技术要求、试验方法、检验规则、包装、标志和质量证明书。GB/T 30063适用于建筑、桥梁、塔架、桩柱、支杆和其他一般结构用的外径不小于400mm的直缝埋弧焊接钢管，不适用于机械结构用钢管。

Manufacture: the tubes shall be manufactured by cold drawn and hot rolled.
Delivery Condition: heat treated.
Inspection & Test: chemical composition test, elongation test, hardness test, flattening test, bending test, flaring test, NDT, surface inspection and dimension check.

Length: 4000mm; 6000mm; 6500mm; 10000mm; 12010mm; and so on.
Max length: 18000mm

Keyword: GOST 8732-78, Steel Pipe, Hot worked Steel Pipe, Seamless Steel Pipe

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