ASTM B392 Niobium Bar

Type: Niobium Bar
Materials: UNS RO4200,UNS RO4210, UNS RO4251,UNS RO4261
Size: Diameter: ∅4.0~∅150mm  Length: 200-6500mm
Standard: ASTM B392

Niobium and niobium alloy products

Material properties

Niobium and niobium alloy (such as TA-2.5W, TA-10W, TA-40NB, etc.) bars are provided with:

• High melting point
• Corrosion
• Good cold working performance

Standard

• Niobium Plate/Sheet – ASTM B391
• Niobium Foil & Strip – ASTM B708
• Niobium Tube – ASTM B394
• Niobium Pipe – ASTM B394
• Niobium Bar & Billet – ASTM B392
• Niobium Rod & Wire – ASTM B392

The product application

Rod, wire materials are widely used in chemistry, electronics, aviation and aerospace and other fields.
Niobium and niobium alloy rods are used as structural materials of aero engines and rocket nozzles, reactor internal components and envelopment materials, and various corrosion resistant parts and components under the corrosion resistance of nitric acid, hydrochloric acid or sulfuric acid.
The addition of zirconium to niobium can obviously improve the oxidation resistance and strength of the material.
Niobium and niobium zirconium alloy wires are widely used in the manufacture of high pressure sodium lamps and anode leads for electrolytic capacitors. (Executive standard: ASTMB392-95).

Product specification

Niobium and niobium alloy tubes.

Chemical composition

The element	Type 1 (RO4200)	Type 2 (RO4210)	Type 3 (RO4251)	Type 4 (RO4261)
	% wt., not greater than (Max.)
C	0.01	0.01	0.01	0.01
N	0.01	0.01	0.01	0.01
H	0.0015	0.0015	0.0015	0.0015
O	0.015	0.025	0.015	0.025
Zr	0.02	0.02	0.8 ~ 1.2	0.8 ~ 1.2
Ta	0.1	0.2	0.1	0.2
Fe	0.005	0.01	0.005	0.01
Si	0.005	0.005	0.005	0.005
W	0.03	0.05	0.03	0.05
Ni	0.005	0.005	0.005	0.005
Mo	0.010	0.010	0.010	0.010
Hf	0.02	0.02	0.02	0.02
Nb	allowance	allowance	allowance	allowance

Note:

The chemical composition of the product is reported by the chemical composition of the ingot.
It can be produced according to user’s requirements.

Additional chemical composition requirements for the final product (to be determined only when specified in the contract)

The element	Type 1 (RO4200)	Type 2 (RO4210)	Type 3 (RO4251)	Type 4 (RO4261)
	% wt., not greater than (Max.)
O	0.0250	0.0400	0.0250	0.0400
C	0.0100	0.0150	0.0100	0.0150
N	0.0100	0.0100	0.0100	0.0100
H	0.0015	0.0015	0.0015	0.0015

Mechanical properties (annealing state)

category	Tensile strength Sigma b, psi (MPa), or greater	Yield strength, Sigma, 0.2 psi (MPa), or greater	elongation Delta, %, p
1621500-003 Rod, 0.125in(3.18mm) ~ 2.5in(63.5mm) diameter
Type 1 and Type 2	18000 (125).	10500 (73).	25
Type 3 and Type 4	28000 (195).	18000 (125).	20
2021000-003 Wire, diameter 0.020in(0.508mm) ~ 0.124in(3.14mm)
Type 1 and Type 2	18000 (125).	/	20
Type 3 and Type 4	28000 (195).	/	15

Note:

Diameter 0.050 inch (1.27mm), Marking Distance 10 inch (254mm);

The diameter is BBB 0 0.050 “(1.27mm) and the mark distance is either 1″ (25.4mm) or 2” (50.8mm).

Specifications and tolerances

Nominal diameter in.(mm)	The outside diameter tolerance In. (mm), plus or minus	The wall thickness tolerance %, plus or minus
< 1 (25.4)	0.004 (0.102)	10
1-1.5 (25.4 ~ 38.1)	0.005 (0.127)	10
1.5 ~ 2 (38.1 ~ 50.8)	0.006 (0.152)	10
2 ~ 2.5 (50.8 ~ 63.5)	0.007 (0.178)	10
2.5 ~ 3.5 (63.5 ~ 88.9)	0.010 (0.254)	10

Bending

Diameter, in. (mm) Tolerance, in. (mm), plus or minus 0.020 ~ 0.030 (0.51 ~ 0.76) 0.00075 (0.019) 0.030 ~ 0.060 (0.76 ~ 1.52) 0.001 (0.025) 0.060 ~ 0.090 (1.52 ~ 2.29) 0.0015 (0.038) 0.090 ~ 0.125 (2.29 ~ 3.18) 0.002 (0.051) 0.125 ~ 0.187 (3.18 ~ 4.75) 0.003 (0.076) 0.187 ~ 0.375 (4.75 ~ 9.53) 0.004 (0.102) 0.375 ~ 0.500 (9.53 ~ 12.7) 0.005 (0.127) 0.500 ~ 0.625 (12.7 ~ 15.9) 0.007 (0.178) 0.625 ~ 0.750 (15.9 ~ 19.1) 0.008 (0.203) 0.750 ~ 1.000 (19.1 ~ 25.4) 0.010 (0.254) 1.000 ~ 1.500 (25.4 ~ 38.1) 0.015 (0.381) 1.500 ~ 2.000 (38.1 ~ 50.8) 0.020 (0.508) 2.000 ~ 2.500 (50.8 ~ 63.5) 0.03 (0.762)

Note: It can be processed according to user’s requirement.

China Niobium Bar Manufacturer www.steeljrv.com offers ASTM B392 Niobium Bar.