Hastelloy C-276 Chromium–Nickel Alloy Round Bar for Shipbuilding

1. Material Description

Hastelloy C-276 (UNS N10276, W.Nr. 2.4819) is a nickel–chromium–molybdenum–tungsten alloy with very low carbon and silicon, designed for excellent corrosion resistance in both oxidizing and reducing media.

It offers outstanding resistance to pitting, crevice corrosion, and stress-corrosion cracking in chloride-bearing and contaminated seawater environments, making it well suited to demanding shipbuilding and offshore conditions.

2. Specifications

Grade & Designations

• Material: Hastelloy C-276 round bar

• UNS: N10276

• W.Nr.: 2.4819

• EN: NiMo16Cr15W

• Product: Hot-rolled / forged / peeled / polished round bar

Typical Size Range

• Diameter: approx. 5–300 mm (larger on request)

• Length: up to 6 m, cut-to-length available

• Supply condition: solution annealed, water-quenched, straightened

3. Key Characteristics

1. Excellent resistance to harsh seawater – resists localized corrosion and SCC in natural, polluted, or chlorinated seawater where stainless steels and Cu-Ni alloys can fail.

2. Safe in mixed acid / chloride media – suitable for environments containing chlorides plus mineral or organic acids, as found in scrubber and waste-treatment systems.

3. High strength with good ductility – provides reliable mechanical performance at room and moderately elevated temperatures.

4. Very good weldability – low C and Si help maintain corrosion resistance in the weld heat-affected zone.

4. Our Advantages

From recent sourcing questions for marine nickel alloys, buyers usually focus on corrosion reliability, standards compliance, machining/welding behavior, and service life.

1. Standards-compliant and fully traceable

   • Supply according to major international standards for C-276 bar with EN 10204 3.1 certificates and heat-number traceability.

2. Seawater-proven corrosion performance

   • Material selection based on data for C-276 in chloride and mixed acid service, targeting low risk of pitting and crevice corrosion in aggressive marine conditions.

3. Shipyard-friendly fabrication

   • Bars delivered straight, solution-annealed and machinable, with guidance available for welding procedures and filler selection in marine and offshore projects.

4. Lifecycle-oriented alloy choice

   • For critical shipboard systems where failure is very costly, C-276 provides a conservative choice compared with lower-alloyed stainless steels, often reducing unplanned repairs over the vessel lifetime.

5. Chemical Composition

6. Mechanical Properties

7. Applicable Standards

For Hastelloy C-276 round bar (UNS N10276):

• ASTM / ASME: ASTM B574 / ASME SB574 – nickel alloy bar, rod, and wire

• EN / DIN: W.Nr. 2.4819, NiMo16Cr15W (nickel alloy wrought products standards)

• JIS: NW 0276 (nickel-based corrosion-resistant alloy)

• GB / GOST: Corresponding Chinese and Russian designations available on request for classification society projects

8. Application Fields

Typical roles of C-276 round bar in marine and shipbuilding environments:

• Seawater handling: pump shafts, valve stems, and highly loaded components in aggressive or polluted seawater and ballast systems

• Exhaust gas scrubbers: flanges, nozzles, fasteners, and supports exposed to hot acidic chloride condensate

• Desalination and water treatment: parts in high-salinity or high-temperature stages where stainless steels suffer localized attack

• Offshore and special vessels: critical rotating parts or fittings in harsh chemical and mixed acid / chloride service

Q: Are you trading company or manufacturer ?

A: manufacturer,also can do trading.

Q: How long is your delivery time?

A: Generally speaking,it is 10-15 days if the goods are in stock,or it is 30-40 days if the goods are not in stock,

it is according to quantity.

Q: Do you provide samples? is it free or extra ?

A: Yes, we could offer the sample for free charge but need pay the cost of freight.

Q: What is your terms of payment ?

A: Payment<=2000USD, 100% in advance. Payment>=2000USD, 30% T/T in advance ,balance before shippment.

If you have another question, pls feel free to contact with me.