YB/T 4202 Q235A Welded Steel Pipes for Scaffolding, BS EN 39, Q235A, Q235B, Q275A, Q275B, Q295A, Q295B, Q345A, Q345B, Q390A, Q390B

YB/T 4202 Welded Steel Pipes for Scaffolding

Standard: YB/T 4202
Equivalent Standards: BS EN 39

Material: Q235A

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 4202 specifies the size, shape, weight and allowable deviations, technical requirements, test methods, inspection rules, packaging, marking and quality certificates of welded steel pipes for construction scaffolding. YB/T 4202 is applicable to welded steel pipes for scaffolding in construction projects.
YB/T 4202规定了建筑脚手架用焊接钢管的尺寸、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 4202适用于建筑工程中脚手架用焊接钢管。

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

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