YB/T 4371 26CrMo Seamlss Steel Tubes for Perforating Guns for Oil and Gas Wells, 26CrMo, 32CrMo

YB/T 4371 Seamlss Steel Tubes for Perforating Guns for Oil and Gas Wells

Standard: YB/T 4371

Material: 26CrMo

Chemistry Composition

C, %

Si, %

Mn, %

P, %

S, %

Cu, %

Cr, %

Ni, %

Mo, %

V, %

Al, %

Nb, %

N, %

Ti, %

Zr, %

0.08-0.12

0.20-0.50

0.30-0.60

0.020 max

0.010 max

0.20 max

8.00-9.50

0.40 max

0.85-1.05

0.18-0.25

0.02 max

0.06-0.10

0.03-0.07

0.01 max

Mechanical Properties

Tensile Strength , MPa	Yield Strength, MPa	Elongation, %	Impact (KV2)/J	Hardness
585 min	415 min	20 min	40 (OD≥76mm & WT≥14mm)	HBW 185-250	HV 185-265	HRC 25 max

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 4371 specifies the size, shape, weight, technical requirements, test methods, inspection rules, packaging, marking and quality certificate of seamless steel pipes for perforating guns for oil and gas wells. YB/T 4371 is suitable for seamless steel pipes for perforating guns for oil and gas wells.
YB/T 4371规定了油气井射孔枪用无缝钢管的尺寸、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。YB/T 4371适用于油气井射孔枪用无缝钢管。

Manufacture: tubes to GB/T 5310 shall be manufactured by hot rolled or cold drawn.
Heat Treatment: the tubes shall be produced by heat treated as normalizing & tempering, WT>70mm could be quenching & tempering.
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: GB/T 5310, High Pressure Steel Pipe, Boiler Steel Pipe, Steam Boiler Pipe, Pipeline, Piping

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