Seamless Nickel 200 Tube

Seamless Nickel 200 Tubes (UNS N02200) are crafted from commercially pure wrought nickel, offering exceptional resistance to a wide range of corrosive media, particularly caustic alkalies. As a premier manufacturer based in Wenzhou, China, GZH specializes in producing high-purity seamless tubing that adheres to ASTM B161 and ASME SB161 international standards.Beyond its outstanding corrosion resistance, Nickel 200 is renowned for its superior thermal and electrical conductivity and low gas content. Our seamless tubes maintain high mechanical strength from cryogenic temperatures up to 315°C (600°F), making them indispensable for chemical processing, synthetic fiber production, and electronic components. Through advanced cold-drawing and rigorous quality testing, GZH delivers precision-engineered nickel solutions tailored for high-integrity industrial applications.

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Seamless Nickel 200 Tubing: High-Purity Solutions for Caustic & Corrosive Environments

What is a Seamless Nickel 200 Tube?

ASeamless Nickel 200 tube is a high-integrity, commercially pure wrought nickel component (minimum 99.0% Ni content). Manufactured through a precision hot-piercing and cold-drawing process from a single solid billet, these tubes feature a continuous, weld-free grain structure.

This seamless architecture provides superior structural reliability and pressure containment compared to welded alternatives. Nickel 200 is globally recognized for its exceptional resistance to reducing chemicalsandcaustic alkalies, maintaining its mechanical integrity across a wide temperature range.

Technical Advantages & Material Properties

Seamless Nickel 200 tubing offers a distinct set of physical and chemical advantages for critical engineering:

Exceptional Caustic Resistance: It is the premier material for handling caustic soda (NaOH) and potash, offering near-zero corrosion rates in high-concentration alkaline environments, even at boiling temperatures.
High Ductility & Formability: With excellent malleability, Nickel 200 can be readily cold-worked, flared, and bent into complex configurations without compromising material density.
Superior Thermal & Electrical Conductivity: Its high thermal conductivity allows for efficient heat transfer, while its low electrical resistivity makes it ideal for specialized electronic and electrochemical applications.
Magnetic & Magnetostrictive Properties: Unlike many stainless steels, Nickel 200 is ferromagnetic, which is a key requirement for certain sensor and electronic housing applications.
Weld-Free Pressure Safety: The elimination of a longitudinal seam ensures uniform wall thickness and removes the"Heat Affected Zone"(HAZ), maximizing safety in high-pressure fluid transport.

Product Specifications and Data

To provide a comprehensive overview of this high-performance material, here are the detailed technical specifications and performance data for Nickel 200.

Table 1: Chemical Composition of Nickel 200

The composition of Nickel 200 is carefully controlled to achieve its superior properties.

Grade	Ni	Cu	Fe	Mn	C	Si	S
N02200	≥99.00	≤0.25	≤0.40	≤0.35	≤0.015	≤0.35	≤0.01
N02201	≥99.00	≤0.25	≤0.40	≤0.35	≤0.02	≤0.35	≤0.01

Table 2: Typical Mechanical Properties of Nickel 200

Nickel 200 is specifically designed to maintain its strength and shape in various operating environments.

Tensile Strength	Yield Strength	Elongation	Hardness
≥ 400 MPa	≥ 105 MPa	≥ 40%	≤ 120 HBW

Table 3: Typical Physical Properties of Nickel 200

These physical properties highlight the material's ability to perform reliably under a wide range of conditions.

Density	Melting Point	Thermal Expansion	Thermal Conductivity	Modulus of Elasticity	Electrical Resistivity
8.89 g/cm³	1435 - 1446 °C	13.3 µm/m·°C (20-100°C)	60.7 W/m·K (20°C)	205 GPa	0.096 x 10⁻⁶ Ω·m (20°C)

Table 4: The Standard of Seamless Nickel Alloy Tube or Pipe ASTM B829 Size Tolerance Chart (mm):

STANDARD	OD[D]	TOLERANCE	THICKNESS[S]	TOLERANCE	LENGTH	TOLERANCE
ASTM B829 (Seamless Cold-Worked Tube and Pipe)	10	±0.13	S(ave): ±15%	S(Min):+30%/0	D<50.8	+3.2/0
	16≤D≤38	±0.19	S(ave): ±10%	S(Min):+22%/0
	38	±0.25
	76	±0.38			50.8≤D	+4.8/0
	114	±0.51	S(ave): ±12.5%	S(Min):+28%/0
	152	±0.64
	168	±0.79
	219	+1.57/-0.79	S(ave): +15%/-12.5%	S(Min):+30%/0
	356	+3.18/-0.79
ASTM B829 (Hot-Finished Tube)	19≤D≤38	+0.4/-0.8	S(ave): ±12.5%	S(Min):+28.5%/0	D<50.8	+3.2/0
	38	+0.8/-0.8			50.8≤D	+4.8/0
	102	+1.6/-0.8
ASTM B829 (Seamless Hot-Worked Pipe)	25≤D≤48	+0.4/-0.79	S(ave): +16%/-12.5%	S(Min):+28.5%/0	D<50.8	+3.2/0
	48	±0.79
	114	±1.2			50.8≤D	+4.8/0
	165	±1.6

Common Industrial Applications

The unique electrochemical profile of Nickel 200 seamless tubes makes them indispensable in several high-purity sectors:

Chemical & Petrochemical Processing: Essential for the production and handling of caustic alkalies, chlorine, and hydrogen chloride.
Food & Synthetic Fiber Production: Used to maintain product purity in the processing of fats, oils, and viscose rayon where contamination must be avoided.
Marine & Saltwater Engineering: Provides reliable service in distilled water and moving seawater environments.
Electronics & Aerospace: Used for battery components, lead wires, and electronic tube parts due to its conductivity and magnetic properties.

The Precision Manufacturing Process

To ensure the highest metallurgical standards, Nickel 200 seamless tubes undergo a multi-stage fabrication sequence:

Billet Preparation: High-purity Nickel 200 billets are heated to optimal forging temperatures.
Rotary Piercing: The heated billet is pierced by a mandrel to create a high-quality"hollow"without any welding.
Cold Drawing / Pilgering: The hollow shell is precision-drawn through dies to reach the exact outer diameter (OD) and wall thickness specifications.
Controlled Annealing: The tubing is heat-treated in a controlled atmosphere to restore ductility and achieve a uniform grain size.
Strict Quality Control: Every tube is subjected to Non-Destructive Testing (NDT), including Eddy CurrentorHydrostatic testing, to ensure zero-defect performance in the field.
Technical Comparison: Nickel 200 vs. Nickel 201
While both grades are commercially pure nickel, the primary difference lies in their carbon content. Understanding this distinction is vital for high-temperature structural integrity.

Feature	Nickel 200 (UNS N02200)	Nickel 201 (UNS N02201)
Nickel Content	99.0% min	99.0% min
Carbon Content	Max 0.15%	Low Carbon (Max 0.02%)
Operating Temp	Up to 600°F (315°C)	Up to 1250°F (677°C)
Key Limitation	Susceptible to graphitization above 600°F.	Slightly lower mechanical strength than 200.
Primary Use	General caustic handling and food processing.	High-temperature caustic evaporators and reactors.

Technical Insight: If your application involves temperatures exceeding 600°F (315°C), Nickel 201 is the mandatory choice to prevent graphitization—a process where carbon precipitates as graphite, leading to severe embrittlement and material failure.