China ASTM B619/B619M Welded Nickel and Nickel-Cobalt Alloy Pipe Manufacturers, Suppliers

Scope  
- Applies to welded pipe made from nickel and nickel-cobalt alloys (e.g., UNS N06600, N06625, N08825) for corrosion-resistant or high-temperature service.  
- Includes both seamless and welded construction, with welded pipes further classified as fusion-welded or welded + cold-worked.

Product Description

Ordering Information

Buyers must specify the following details for procurement:

ASTM Standard (B619-22) and alloy UNS number (e.g., N06625).
Dimensions (OD, wall thickness, length).
Condition (as-welded, annealed, cold-worked).
Finish (pickled, blasted, etc.).
Certification (if required).
Additional Testing (e.g., hydrostatic, NDE).
Material Codes (UNS Alloys)

The standard covers a wide range of common nickel alloys:

» N02200, N02201 (Nickel 200/201)
» N06600 (Inconel 600)
» N06625 (Inconel 625)
» N08825 (Incoloy 825)
» N10276 (Hastelloy C276)
Chemical & Mechanical Properties
Chemical Composition: Strict limits for nickel, chromium, cobalt, molybdenum, and controlled trace elements (carbon, sulfur).
Mechanical Properties: Tensile strength, yield strength, and elongation requirements vary by alloy. For example, N06625 annealed pipe must meet ≥ 120 ksi (827 MPa) tensile strength.
Inspection & Testing Requirements
1. Chemical Analysis: Performed on heat samples.
2. Tension Tests: One per lot.
3. Hydrostatic Testing: Optional unless specified.
4. NDE: Radiography or dye penetrant testing for welds.
5. Visual Inspection: Surface must meet strict acceptance criteria.
ASTM B619-22 UNS Material Table
UNS Number Common Alloy Name Primary Composition
N02200Nickel 20099.6% Ni (low carbon)
N02201Nickel 20199.6% Ni (very low carbon)
N04400Monel 400Ni-Cu (66% Ni, 31.5% Cu)
N06600Inconel 600Ni-Cr-Fe (72% Ni, 15% Cr)
N06625Inconel 625Ni-Cr-Mo (61% Ni, 21.5% Cr, 9% Mo)
N08800Incoloy 800Ni-Fe-Cr (32.5% Ni, 21% Cr)
N08810Incoloy 800HHigh-carbon 800 variant
N08825Incoloy 825Ni-Fe-Cr-Mo (42% Ni, 21.5% Cr, 3% Mo)
N10276Hastelloy C276Ni-Mo-Cr (57% Ni, 16% Cr, 16% Mo)
N06022Hastelloy C22Ni-Cr-Mo-W (56% Ni, 22% Cr, 13% Mo)
N06059Hastelloy C59Ni-Cr-Mo (59% Ni, 23% Cr, 16% Mo)
N10665Hastelloy B-2Ni-Mo (65% Ni, 28% Mo)
ASTM-B619 Welded Pipe
Nickel Alloy Pipe Testing
Welded Nickel Alloy Pipe
Product Description Information
Frequently Asked Questions (FAQ)
What is the scope of the ASTM B619-22 standard?
The ASTM B619-22 standard covers welded nickel and nickel-cobalt alloy pipes intended for general corrosive service and high-temperature environments.
What delivery conditions are available for B619 pipes?
These alloy pipes can be supplied in as-welded, annealed, or cold-worked conditions, depending on the specific application requirements.
Are hydrostatic tests mandatory for all ASTM B619 pipes?
No, hydrostatic testing is typically optional unless it is specifically requested by the purchaser at the time of ordering.
Which alloys are commonly used for aggressive corrosive environments?
Alloys such as Hastelloy C276 (N10276) and Inconel 625 (N06625) are widely recognized for their excellent resistance in highly aggressive media.
What identification markings should be on the pipe?
Each pipe should be marked with the alloy UNS number, ASTM standard designation, heat number, size, and manufacturer’s identification.
How does ASTM B619 differ from ASTM B622?
ASTM B619 specifically covers welded pipes, whereas ASTM B622 is the standard for seamless nickel and nickel-cobalt alloy pipes.

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