Specifications

Niobium Seamless Pipe
Available in a wide range of forms including nut, screw, ring, wire, foil, sheet, rod, strip, plate, tube

Niobium Seamless Pipe

Introduction:

Niobium is a lustrous, grey, ductile, paramagnetic metal in periodic table
The metal takes on a bluish tinge when exposed to air at room temperature for extended periods.Despite presenting a high melting point in elemental form (2,468 °C), it has a low density in comparison to other refractory metals. Furthermore, it is corrosion resistant, exhibits superconductivity properties, and forms dielectric oxide layers. These properties especially the superconductivity are strongly dependent on the purity of the niobium metal. When very pure, it is comparatively soft and ductile, but impurities make it harder.

The atoms of niobium is slightly less electropositive and smaller than the atoms of its predecessor in the periodic table, zirconium, while it is virtually identical in size to the heavier tantalum atoms as a consequence of the lanthanide contraction. As a result, niobium's chemical properties are very similar to the chemical properties of tantalum, which appears directly below niobium in the periodic table. Although its corrosion resistance is not as outstanding as that of tantalum, its lower price and greater availability make niobium attractive for less exact uses such as linings in chemical plants

Standard: GB8183-87

Dimension & Tolerance (mm)

 

OD(outer diameter)

OD Tolerance

WL THK(wall thickness)

WL THK Tolerance

0.2

0.3

0.4

0.5

0.6

0.8

1.0

1.2

1.5

2.0

2.5

3.0

3.5

4.0

3`5

±0.06

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`

`

`

`

±10%    of        WL THK

>5`15

±0.10

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`

`

`

>15`25

±0.13

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`

`

`

`

>25`35

±0.19

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`

`

`

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>35`40

±0.19

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`

`

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>40`50

±0.19

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`

`

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Chemical Composition

Type	Nb	Impurity,%,≤
		Fe	Si	Mo	W	Ti	Cr	O	N	H	C
Nb1	remainder	0.01	0	0	0.05	0	0	0.02	0.01	0	0.02
Nb2	remainder	0.03	0	0.1	0.1	0	0	0.03	0.05	0	0.03

Interstitial Element Composition

Type	Interstitial Element,%,≤
	O	N	H	C
Nb1	0.04	0.01	0	0
Nb2	0.04	0.05	0	0

Mechanic Property

Type

State

Tensile Strengthb  Mpa(kgf/mm2)

Elongationε,%                                          (Scale Distance 25mm)

Nb1 Nb2

M

≥170(17.5)

≥25

 

Our products is available in a wide range of forms including nut, screw ,ring ,wire, foil, sheet, rod, strip, plate, tube, alloys according to Standard ASTM AMS ASME MIL DMS JIS GB, etc.

As a DNV certified ISO9001:2000 company, we have strict quality control system and provide professional service to our customers around the world. Our customers are in aerospace industry, chemical equipment industry, medical industry and civilian industry in USA, UK, Germany, Sweden and some other countries.