YB/T 4414 20 Seamless Steel Tubes for Corrugated Fibreboard Machine, EN 10219-1, EN 10219-2, ASTM A554, 20, 35, 45, 50, 35CrMo, 42CrMo, 48CrMo, 50CrV, 50CrMoV

YB/T 4414 Seamless Steel Tubes for Corrugated Fibreboard Machine

Standard: YB/T 4414
Equivalent Standards: EN 10219-1, EN 10219-2, ASTM A554

Material: 20

Chemistry Composition

C, %	Si, %	Mn, %	P, %	S, %	Cu, %	Cr, %	Ni, %	Mo, %	V, %
0.17-0.23	0.17-0.37	0.35-0.65	0.025 max	0.015 max	0.20 max	0.25 max	0.25 max	0.15 max	0.08 max

Mechanical Properties

Tensile Strength , MPa	Yield Strength, MPa	Elongation, %	Impact (KV2)/J	Hardness
410-550	245 min	24 min	40 (OD≥76mm & WT≥14mm)	HBW 120-160	HV 120-160

Outside Diameter & Tolerance

Hot Rolled	Outside Diameter, mm	Tolerance
	Outside Diameter, mm	Ordinary	Advanced
	OD＜57	±0.40mm	±0.30mm
	57≤OD≤325, WT≤35	±0.75%	±0.50%
	57≤OD≤325, WT>35	±1%	±0.75%
	325＜OD≤600	+1% or +5mm	-
	OD>600	+1% or +7mm	-
Cold Drawn	Outside Diameter, mm	Tolerance
	OD≤25.4	±0.15mm	-
	25.4＜OD≤40	±0.20mm	-
	40＜OD≤50	±0.25mm	-
	50＜OD≤60	±0.30mm	-
	OD>60	±0.50%	-

Wall thickness & Tolerance

Hot Rolled	Wall Thickness, mm	Tolerance
	Wall Thickness, mm	Ordinary	Advanced
	WT≤4.0	±0.45mm	±0.35mm
	4＜OD≤20	+12.5%/-10%	±10%
	WT>20, OD＜219	±10%	±7.5%
	WT>20, OD≥219	+12.5%/-10%	±10%
Cold Drawn	Wall Thickness, mm	Tolerance
	Wall Thickness, mm	Ordinary	Advanced
	WT≤3.0	±0.30mm	±0.20mm
	WT>3	±10%	±7.5%

YB/T 4414 specifies the order content, size, shape, weight, technical requirements, test methods, inspection rules, packaging, marking and quality certificate of seamless steel tubes for corrugated fibreboard machine. YB/T 4414 is suitable for the manufacturing seamless steel tubes for corrugated rolls, pressure rolls and preheating rolls in corrugated cardboard machine, rubber coating rolls and printing rolls in printing machine.
YB/T 4414规定了瓦楞纸板机械用无缝钢管的订货内容、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。YB/T 4414适用于制造瓦楞纸板机械设备中瓦楞辊、压力辊和预热辊，以及印刷机械设备中涂胶辊和印刷辊用无缝钢管。

Manufacture: tubes to YB/T 4414 shall be manufactured by hot rolled or cold drawn.
Heat Treatment: the tubes shall be produced by heat treated as normalizing.
Inspection & Test: chemistry composition analysis, tension test, flattening test or bending test, flaring test, hardness test, impact test, grain size grade, decarburized layer of both inside & outside, macroscopic examination, non-metallic inclusions, microstructure, NDT, surface inspection and dimension check.

Length: 4000mm; 6000mm; 9000mm; 12000mm; and so on.
Max developed length: 30 meters, also U bending, finning, studded process can be provided.
Option: shot blasting on the outside surface to remove mill scale, make the surface matte colour; surface polishing as preparation work done for further processing, for instance finning.

Keyword: YB/T 4414, High Pressure Steel Pipe, Boiler Steel Pipe, Steam Boiler Pipe, Pipeline, Piping

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