YB/T 4112 Q265GNH Welded Steel Tubes with Atmospheric Corrosion Resistance for Structural Purposes, ASTM A847/A847M, Q265GNH, Q295GNH, Q310GNH, Q355GNH, Q235NH, Q295NH, Q355NH, Q415NH, Q460NH

YB/T 4112 Welded Steel Tubes with Atmospheric Corrosion Resistance for Structural Purposes

Standard: YB/T 4112
Equivalent Standards: ASTM A847/A847M

Material: Q265GNH
Equivalent Material: 1010, St35.8, P235TR1, P235TR2

Chemistry Composition

C, %	Si, %	Mn, %	P, %	S, %	Cr, %	Ni, %	Cu, %
0.07-0.13	0.17-0.37	0.35-0.65	0.025 max	0.025 max	0.15 max	0.30 max	0.25 max

Mechanical Properties

Tensile Strength , MPa	Yield Strength, MPa	Elongation, %
335 min	205 min	24 min

Dimensions & Tolerance

Side Length (mm)	Tolerance
Side Length (mm)	Ordinary	Advanced
SL≤30mm	±0.30mm	±0.20mm
30mm＜SL≤50mm	±0.40mm	±0.30mm
50mm＜SL≤75mm	±0.80%	±0.70%
SL>75mm	±1%	±0.80%
Wall Thickness (mm)	Tolerance
Wall Thickness (mm)	Ordinary	Advanced
WT≤1mm	±0.18mm	±0.12mm
1mm＜WT≤3mm	+15%/-10%	+12.5%/-10%
WT>3mm	+12.5%/-10%	±10%

YB/T 4112 specifies the size, shape, weight and allowable deviation, technical requirements, test methods, inspection rules, packaging, marking and quality certificate of high strength welded steel pipes with atmospheric corrosion resistance. YB/T 4112 is applicable to straight seam welded steel pipes with atmospheric corrosion resistance for piles, towers, pillars, grid structures and other structures used in building structures.
YB/T 4112规定了高强度耐候焊接钢管的尺寸、外形、重量及允许偏差、技术要求、试验方法、检验规则、包装、标志和质量证明书。YB/T 4112适用于建筑结构中使用的桩柱、塔架、支柱、网架结构及其他结构用直缝耐候焊接钢管。

Manufacture: tubes to GB/T 3094 shall be manufactured by seamlesss process.
Delivery Condition: tubes should be delivered under cold finished condition, with purchaser agreement, it can also be with heat treated.
Inspection & Test: chemistry composition analysis, tensile test, surface inspection and dimension check.

Keyword: GB/T 3094, Shaped Steel Tubes, Cross-section Shaped

Home | About Us | Product | Know How | Contact Us