Hastelloy C-4 (UNS N06455 / W.Nr. 2.4610) Nickel-Chromium-Molybdenum Alloy Round

• Hastelloy C‑4 thermally‑stable nickel‑base corrosion‑resistant round bar, UNS N06455 / W.Nr 2.4610, conforms to ASTM B574 bar specification
• Low‑carbon Ti‑stabilized Ni‑Cr‑Mo formulation; outstanding metallurgical stability across 650‑1040 °C temperature range
• Minimizes harmful intermetallic precipitation; excellent resistance to weld‑heat‑affected‑zone sensitization, usable in as‑welded condition without post‑weld solution annealing
• Good resistance to pitting, crevice corrosion and chloride‑induced stress‑corrosion‑cracking(SCC); performs well in oxidizing & reducing mixed‑acid environments
• Solution‑annealed & water‑quenched delivery delivers good ductility, formability and machinability for CNC fabrication
• Custom diameter, length & full‑scope CNC turning, milling, threading per customer CAD/PDF drawings
• Premium raw stock for chemical reactors, waste‑incineration equipment, FGD components, fertilizer‑processing and high‑temperature corrosive process hardware

This series of Hastelloy C‑4 round bars are manufactured by hot rolling, forging or cold‑drawing, followed by solution annealing and rapid water quenching to obtain homogeneous single‑phase solid‑solution austenitic microstructure. Standard delivery is soft solution‑annealed blank ready for full‑range rough‑and‑finish CNC machining.

Hastelloy C‑4 (UNS N06455 / 2.4610) is a Ti‑stabilized low‑carbon nickel‑chromium‑molybdenum alloy, developed for superior thermal metallurgical stability. Compared with Hastelloy C276, C‑4 removes tungsten and strictly limits iron content to greatly suppress intermetallic‑phase precipitation under high‑temperature exposure and welding cycles. It retains good comprehensive corrosion resistance for mixed mineral acids, halide‑containing brine and flue‑gas condensate media. Thanks to titanium stabilization, weld heat‑affected zones avoid knife‑line corrosion risk; many assemblies can go into service in as‑welded state. Widely processed into agitator shafts, valve stems, heat‑exchanger bar blanks and high‑strength fasteners for chemical‑processing, waste‑to‑energy incineration, fertilizer‑production and flue‑gas‑desulfurization industries.

• Solid‑solution‑strengthened nickel‑base corrosion‑resistant alloy, non‑hardenable via quenching or aging treatment
• Low‑carbon plus titanium stabilization, highly resistant to sensitization & knife‑line corrosion after welding; post‑weld annealing is normally not required
• Excellent microstructural stability during long‑time exposure at 650‑1040 °C, minimal brittle intermetallic‑phase formation
• Balanced pitting / crevice / SCC resistance for chloride‑containing brine, hydrochloric‑phosphoric mixed‑acid service
• Solution‑annealed quenched condition guarantees low residual stress, good ductility and machinability for fabrication
• Note: Oxidizing‑chloride corrosion resistance is slightly lower than Hastelloy C276 due to removal of tungsten element

表格

表格

• Hastelloy Series: C‑4, C276, C22, C2000, B3
• Inconel Series: 600, 601, 625, 718, X‑750
• Incoloy Series: 800H/800HT, 825, 925
• Super‑Austenitic: 254SMO, 904L
• Duplex / Super Duplex: 2205, S32750, S32760
• PH Stainless Steel:17‑4PH,15‑5PH
• Alloy Steel:4140, F22, F91, A105

1 Outstanding High‑Temperature Micro‑StabilityTi‑stabilized low‑carbon formula greatly restricts harmful intermetallic‑phase precipitation within 650‑1040 °C service window; retains toughness and corrosion performance after thermal cycling and welding.

2 Weld‑Heat‑Affected‑Zone Resistance To Sensitization
Resists knife‑line / intergranular corrosion after welding; most components can operate under as‑welded status without costly post‑weld solution‑annealing treatments.

3 Versatile Local‑Corrosion Performance
Good resistance to chloride‑induced pitting, crevice corrosion and SCC; compatible with mixed reducing‑oxidizing mineral‑acid chemical‑process environments.

4 Good Fabrication Characteristics
Solution‑annealed condition provides high ductility; supports turning, milling, threading and mainstream welding processes for complex‑geometry component manufacturing.

5 Reliable For High‑Temp Corrosive Process Equipment
Preferred material for waste‑incineration, fertilizer‑production and thermal‑cycling chemical‑plant hardware where post‑weld heat‑treatment is impractical.

• Chemical‑Processing Industry: Mixed‑acid reactor agitator shafts, high‑corrosion valve stems, heat‑exchanger bar blanks, hydrochloric‑acid circulating pump spindles
• Waste‑To‑Energy / Incineration: Flue‑gas scrubber internals, high‑temperature corrosive‑gas exposed rotary components
• Fertilizer & Pesticide Production: Phosphoric‑acid process equipment shafts, corrosive‑media mixing hardware blanks
• Power‑Plant FGD: Thermal‑cycling desulfurization system parts, condensate‑exposed component raw stock
• Special‑Chemical Manufacturing: High‑purity process equipment fasteners & rotary spindle blanks

We provide integrated hot‑rolling / forging / cold‑drawn Hastelloy C‑4 round‑bar production, full custom CNC machining per customer CAD/PDF drawings:

• Fixed‑length cutting, facing, centering, external turning & chamfering
• Precision threading, spline machining, cylindrical grinding & surface polishing
• Technical consultation for nickel‑alloy welding and process specification guidance
• Pickling, passivation anti‑corrosion surface finishing

We supply Hastelloy C‑4 round‑bar blanks and custom‑machined components for chemical‑processing, waste‑incineration, fertilizer‑industry and global industrial clients.

• 100% UT ultrasonic + eddy‑current inspection for internal segregation, inclusion and surface crack defects
• Full‑batch tensile, yield, elongation mechanical‑property testing for each heat lot
• Spectrometer full‑spectrum chemical‑composition verification per heat number
• Metallographic solid‑solution austenite microstructure inspection, check for harmful intermetallic precipitates
• High‑precision micrometer & CMM inspection for diameter, straightness and dimensional‑tolerance control

Mill Test Certificate EN 10204 3.1 can be issued and delivered together with shipment documents before delivery.

‑ Inner: Independent anti‑rust plastic sleeve + waterproof film full wrap for bar‑surface scratch protection ‑ Outer: Reinforced fumigated wooden pallet with separation strips to avoid collision & bending deformation ‑ Custom heavy‑duty export packaging for extra‑long / large‑diameter bars available upon request

Lead Time
Normally 15‑50 working days after receiving advance payment. Exact lead time depends on bar diameter, length, order quantity and custom‑machining demands.

Please specify bar dimension, drawings and whether you require raw bar blank or fully‑machined finished parts. Our nickel‑alloy metallurgy team will provide competitive factory price within 24 hours. Free corrosive‑medium material‑matching technical consultation!