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GB/T9808 ZT380 High Strength Steel Tubing Precision Good OD ID Tolerance

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GB/T9808 ZT380 High Strength Steel Tubing Precision Good OD ID Tolerance

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Brand Name :	New Era
Model Number :	GB/T9808
Certification :	ISO9001 ISO14001
Price :	Negotiation
Payment Terms :	T/T
Supply Ability :	3000 tons/month
Delivery Time :	45 days

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GB/T9808 ZT380 High Strength Steel Tubing Precision Good OD ID Tolerance

GB/T9808 ZT380 Good OD and ID tolerance Seamless Steel Tubes

Size:

OD:33-340mm WT:2-28mm L:4000mm-12500mm

Steel Grade:

ZT380,ZT490,ZT520,ZT540,ZT590,ZT640,ZT740

The Production method:

Hot rolling(extrusion) or cold drawing(rolling) seamless method.

Delivery State:

Hot rolling(extrusion)steel tubes should be delivered with hot rolling condition or hot finished.Cold drawn(rolling) steel tubes should be delivered with hot finished.

Surface quality

There is no visual visible cracks,rolling, folding,scarring and abscission layer in the internal and external surfaces of the steel pipe.

Test:

Tensile tast

Ultrasonic inspection

Eddy current inspection

Magnetic flux leakage inspection

Tolerance of Outer Diameter and Wall Thickness

Standard	Production Method	Tube Size		Tolerance
GB/T 9808-2008	Hot rolled	OD		(+1.0%D) or +0.65 (-0.5%D) -0.35
		WT	≤10	(+15%S)or +0.45 (-10%S) -0.35
		WT	>10	(+12.5%S, -10%S)
	Cold Drawn(rolled)	OD		±0.50%D or ±0.20
	Cold Drawn(rolled)	WT		±8%S or ±0.15
Q(N)/ T118-2010	Cold Drawn	OD	OD	±0.40%D or ±0.20
Q(N)/ T118-2010	Cold Drawn	WT	WT	±7%S or ±0.15

GB/T9808 ZT380 High Strength Steel Tubing Precision Good OD ID Tolerance

Product Tags:

cold drawn seamless steel tube

thick wall steel tube

GB/T9808 ZT380 High Strength Steel Tubing Precision Good OD ID Tolerance

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