Niobium sheet for jewelry is a material used in jewelry making. Its composition is pure niobium or niobium alloy, which can be doped with other elements such as titanium, tin, and zirconium.

Niobium sheet is a metallic material that is often used in the creation of jewelry. It is a soft, silver-gray metal that is ductile and malleable. Niobium is known for its high melting point, corrosion resistance, and low toxicity, making it a popular choice for use in body jewelry.

1. Chemical composition

The composition of pure niobium is Nb. In niobium alloys, common alloy compositions are Nb-1%Zr, Nb-20%Ti, Nb-10%Ti-35%Cb, etc.

Fe	Si	Mo	W	Ti	Cr	Ta	Ni	O	C	H	N	Nb
Nb1	0.005	0.005	0.010	0.010	0.002	0.002	0.1	0.005	0.015	0.010	0.001	0.010
Nb2	0.010	0.005	0.010	0.020	0.005	0.005	0.250	0.005	0.025	0.020	0.005	0.025

2. Physical properties

Niobium sheet for jewelry has good corrosion resistance, is difficult to burn, high melting point, high density, and good processing performance. In addition, it also has high thermal conductivity and electrical conductivity and has excellent superconducting and magnetic properties.

Grade	Tensile strength δbpsi (MPa) ≥	Yield strength δ0.2, psi (MPa) ≥	Elongation in 1″/2″ gage length, %, ≥
>=0.010	<0.010	12000 (85)	25
RO4200-1	18000 (125)
RO4210-2	18000 (125)

In terms of its composition, niobium is a transition metal with the atomic symbol Nb and atomic number 41. It is typically found in minerals such as columbite, tantalite, and pyrochlore.

When used in jewelry-making, niobium sheet can be anodized to create a range of vibrant colors. This is because the surface of the metal can be altered to produce a thin, transparent oxide layer that reflects light in various hues. Anodized niobium sheet can be used to create earrings, necklaces, bracelets, and other types of jewelry that are both durable and aesthetically pleasing.

Niobium sheet can be used in jewelry making. Because it is very pure and resistant to corrosion, it retains its surface luster very well. In addition, it is also a more environmentally friendly material because it does not contain metals such as copper, nickel, and chromium, so it will not cause allergic reactions on the skin. In jewelry making, niobium sheet is often used to make necklaces, earrings, rings and other ornaments of different shapes and sizes.

3. Specification & Tolerance

Thickness	Tolerance	Width	Tolerance	Length	Tolerance
>0.15-0.2	±0.015	50-300	±0.02	100-1000	±2.0
>0.2-0.3	±0.020	50-300	±0.03	100-1000	±1.0
>0.3-0.5	±0.030	50-500	±0.04	100-1500	±1.0
>0.5-0.8	±0.040	50-500	±0.06	50-2000	±1.0
>0.8-1.0	±0.060	50-500	±0.08	50-2000	±1.0
>1.0-1.5	±0.080	50-500	±0.10	50-2000	±2.0
>1.5-2.0	±0.120	50-500	±0.14	50-2000	±2.0
>2.0-3.0	±0.160	50-500	±0.18	50-2000	±2.0
>3.0-4.0	±0.180	50-500	±0.20	50-1500	±1.0
>4.0-6.0	±0.200	50-350	±0.24

4. The following is the general production process for manufacturing niobium sheet for jewelry

1) Material preparation: To extract Niobium from raw materials to make niobium sheet, you need to prepare the raw materials of Niobium first. Niobium is a rare metal that can be extracted from niobium ore. After the ore goes through processes such as beneficiation, the extracted pure Niobium can be processed after being converted into ingots.

2) Processing: The ingot is processed into its own size or the shape required by the workpiece at high temperature, and Niobium can also be made into sheet through cold processing. It is also necessary to apply a protective film during processing to avoid some dirt in it.

3) Polishing: Niobium sheet is micro-polished to bring a smoother and smoother surface. This is also a very important step for jewelry making, because the surface of the niobium plate for jewelry must be standard.

4) Order completion: After finishing the process, the niobium plate can be used to make various jewelry, such as necklaces, bracelets, rings, earrings and so on.

The above is the general production process of niobium sheet for jewelry manufacturing. The steps may vary slightly from vendor to vendor, but in general these steps are necessary.