DIN W.Nr. 2.4602 Pipes

1. Standard: ASTM B622, ASTM B619, ASTM B474
2. OD Sizes: 1/2” – 48”
3. Thickness: SCH5~SCHXXS
4. End: Beveled End, Plain End
5. Grades: Hastelloy c22, UNS N06022, EN 2.4602

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Product Introduction

DIN W.Nr. 2.4602 pipes (also designated as UNS N06022 or Hastelloy C22) represent a significant advancement in metallurgy, offering exceptional resistance to both oxidizing and reducing environments. HT PIPE is a hastelloy c22 tube supplier with 15+ export experience. Contact us for more information and quotes for free!

Product Forms

Bar & Rod

Plate & Sheet

Coil & Strip

Pipe & Tube

Fitting: Flange, Tee, Elbow, Reducer etc.

Forging: Ring, Shaft, Circle, Block etc.

ASTM B622 UNS N06022 Pipe Specifications

Specification	ASTM B619/ ASME SB 619, ASTM B622 / ASME SB 622
Standard	SUS, JIS, AISI, ASTM, GB, DIN, EN
Shapes	Hastelloy UNS N06022 Round, Rectangular, Square, Hydraulic, Straight, "U" Shape, Coiled, Honed Tubes, Pan Cake Coils
Manufacturing Type	Seamless / ERW / Welded / Fabricated / CDW / CDS / DOM / CEW / 100% X-Ray Welded
Thickness Range	SCH 5, SCH10, SCH 40, SCH 80, SCH 80S, SCH 160, SCH XXH, SCH XXS, SCH XS
Swg & Bwg	10 Swg., 12 Swg., 14 Swg., 16 Swg., 18 Swg., 20 Swg.
Size	1/2" – 48"
Delivery Condition	Annealed and Pickled (AP), Polished, Bright Annealed (BA), Cold Drawn, MF
Value Added Services	Cutting
	Beveling
	Threading
	Draw & Expansion as per the required Size & Length
	Ultrasonic Testing
	Annealed & Pickled Bending
	Destructive and Non Destructive
END	Plain End, Beveled End, Treaded

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Alloy C22 Chemical Composition

Ni	C	Mo	Mn	Si	Fe	P	S	Co	Cr
Balance	0.010 maximum	12.5 - 14.5	0.50 maximum	0.08 maximum	2 - 6	0.02 maximum	0.02 maximum	2.5 maximum	20 - 22.5

Critical Performance Characteristics of C22 Piping

Resistance to Localized Attack

In stagnant or slow-moving fluids containing halides (such as chlorides or fluorides), standard stainless steel often experiences localized pitting or crevice corrosion. These insidious forms of attack can cause unexpected wall perforations while the rest of the pipe remains pristine. The combination of chromium, molybdenum, and tungsten in Alloy C22 stabilizes the passive surface film, preventing localized breakdown even in hot, acidic brine solutions.

Mitigation of Weld-Zone Intergranular Precipitation

A classic problem when welding high-alloy materials is "weld decay"-the precipitation of carbides or intermetallic phases along grain boundaries in the heat-affected zone (HAZ). This leaves the area adjacent to the weld vulnerable to intergranular attack. Hastelloy C22 maintains an ultra-low carbon ceiling, which suppresses grain-boundary precipitation during welding and allows the pipes to be deployed in the as-welded state without mandatory post-weld heat treatment.

Broad-Spectrum Chemical Versatility

Industrial waste streams and multi-product batch processing plants rarely run a single, predictable chemical. Piping networks may transport a reducing acid in the morning and an oxidizing wash solution in the afternoon. Alloy C22 functions as a universal material, resisting corrosion across a wide range of chemical processes, including:

Ferric and cupric chlorides
Hot contaminated mineral acids (sulfuric, nitric, hydrochloric, phosphoric)
Formic and acetic organic acid systems
Chlorine, chlorine dioxide, and hypochlorite bleaches

Manufacturing Specifications and Standards

Procuring industrial piping requires compliance with rigid standards to verify dimensional tolerance, pressure ratings, and metallurgical integrity. Hastelloy C22 pipes are supplied under several common manufacturing criteria:

Seamless vs. Welded Configurations

Seamless Pipe (ASTM B622 / ASME SB622): Extruded and cold-drawn without a longitudinal weld line. Specified for high-pressure systems, severe mechanical stress, or critical environments where eliminating potential weld line vulnerabilities is a priority.

Welded Pipe (ASTM B619 / ASME SB619): Fabricated from rolled strip or plate and automatically welded. A cost-effective solution for larger diameters and low-to-medium pressure processing applications.

Testing Protocol (ASTM B775 / ASME SB775): Defines the general requirements for supplementary testing, including hydrostatic validation, eddy-current non-destructive examinations, and precise dimensional verification.