Product Highlights
‑ Hastelloy C276 (UNS N10276, EN 2.4819) nickel‑chromium‑molybdenum‑tungsten alloy custom machining parts, manufactured complying with ASTM B564 forgings and ASTM B574 bar specifications. Ultra‑low carbon & silicon content minimizes intergranular precipitation risk after welding. ‑ Outstanding resistance to pitting, crevice corrosion, chloride stress‑corrosion cracking; performs well under both oxidizing and reducing corrosive media; excellent anti‑corrosion performance for mixed acid, brine, flue‑gas scrubber and sour‑gas service environmentsHaynes Int.... ‑ Good ductility and fabricability in solution‑annealed condition; suitable for complex CNC turning, milling, boring, drilling and thread processing for chemical pressure‑bearing components. ‑ Reliable weldability without post‑weld high‑temperature solution‑annealing requirement for most service cases; only stress‑relief treatment is recommended for heavily loaded parts. ‑ Fully custom‑fabricated strictly according to customer CAD / PDF drawings; covers flanges, nozzles, reactor internals, heat‑exchanger components, fasteners and special corrosion‑resistant machined profiles. ‑ Compliant with pressure‑vessel quality requirements; third‑party witness inspection (SGS, TUV, BV) is available. ‑ Long‑term reliable service for chemical processing, flue‑gas desulfurization, oil‑gas sour‑gas system, pharmaceutical and waste‑treatment severe‑corrosion equipment.
Product Overview
This series of Hastelloy C276 machining parts are custom corrosion‑resistant nickel‑alloy components for severe‑corrosion industrial equipment. Raw material adopts qualified C276 bar, forging or plate per ASTM B574 and ASTM B564, delivered in solution‑annealed state. Workpieces go through stress‑relief, multi‑axis CNC machining, deburring, pickling‑passivation and full‑range non‑destructive testing.
Benefiting from high contents of chromium, molybdenum and tungsten, Hastelloy C276 resists pitting, crevice and stress‑corrosion cracking which ordinary stainless steel cannot withstand. Our scope includes custom flanges, manifold blocks, reactor internal parts, heat‑exchanger accessories, special fasteners and various irregular machined profiles. Widely used in chemical, FGD, oil‑gas sour‑service, pharmaceutical and environmental‑protection facilities working under mixed acid and halogen‑containing corrosive conditions.
Material Grade Characteristics – Hastelloy C276 (UNS N10276 / EN 2.4819)
‑ Ni‑Cr‑Mo‑W wrought nickel alloy with ultra‑low carbon and silicon, greatly reducing intergranular corrosion risk after welding operationsHaynes Int.... ‑ Excellent resistance to pitting, crevice corrosion and chloride‑induced stress‑corrosion cracking; adapts to both oxidizing and reducing acid mixed‑media environment. ‑ Stable mechanical properties within continuous operating temperature range ‑196 ~ 540℃, good toughness under cryogenic condition. ‑ Good machinability for complex multi‑feature CNC processing; reasonable cutting parameters are required due to alloy work‑hardening effect. ‑ Good weldability; no mandatory post‑weld solution annealing for general applications; stress‑relief treatment is suggested for high‑load pressure‑bearing components. ‑ Specially designed for equipment components exposed to comprehensive severe‑corrosion working‑conditions.
Chemical Composition (Weight %)
表格
| Grade |
EN Standard No. |
C ≤ |
Si ≤ |
Mn ≤ |
P ≤ |
S ≤ |
Cr |
Mo |
W |
Co ≤ |
Fe |
Ni+Co |
| Hastelloy C276 |
2.4819 |
0.01 |
0.08 |
1.00 |
0.04 |
0.03 |
14.5‑16.5 |
15.0‑17.0 |
3.0‑4.5 |
2.5 |
4.0‑7.0 |
Balance |
Mechanical Properties (Solution Annealed Condition ASTM B564 / B574)
表格
| Property |
Hastelloy C276 Machining Part (Solution Annealed) |
| Delivery Condition |
Solution Annealed, Stress‑Relieved, NDT Inspected |
| Minimum Tensile Strength |
≥690 MPa |
| Minimum 0.2% Yield Strength |
≥283 MPa |
| Minimum Elongation (50mm gauge) |
≥40 % |
| Maximum Brinell Hardness |
≤220 HB |
Note: Actual mechanical values vary with workpiece thickness; complete mill test report will be provided for each batch / piece.
Related Material Grades
- Hastelloy Series: C4, C22, C276, C2000, B2, B3, G‑35
- Inconel Series: 600, 601, 617, 625, 718, X750
- Incoloy Series: 800H, 825, 925
- Monel & Pure Nickel: Monel 400, Monel K500, Nickel200/201
- Duplex / Super‑Duplex Stainless Steel: 2205, 2507
- Austenitic Stainless Steel: 316L, 904L
Key Advantages
- Superior Comprehensive Corrosion‑Resistant Performance High‑alloy formula of Cr‑Mo‑W provides outstanding resistance to pitting, crevice corrosion and chloride stress‑corrosion cracking, suitable for mixed‑acid, halogen‑containing and sour‑gas harsh media.
- Low‑Carbon Formula Optimized for Welding Application Ultra‑low carbon and silicon effectively restrain intergranular carbide precipitation; reduces corrosion‑failure risk of weld‑zone for field‑welded equipment components.
- Complex‑Shape Custom CNC Machining Capacity Support turning, milling, boring, deep‑hole drilling, thread‑making and special‑profile processing; produce finished parts directly per customer drawing.
- Wide Service‑Temperature Adaptability Maintains good mechanical toughness from cryogenic temperature up to 540 ℃; applicable for both low‑temperature corrosive process and moderate‑temperature chemical equipment.
- Pressure‑Equipment‑Grade Full Traceability Control 100% multi‑mode NDT inspection, batch‑by‑batch PMI spectral analysis; full material traceability complying with ASTM B564 / B574 for global chemical and energy projects.
Typical Applications
- Chemical reactor internal components, corrosion‑resistant flanges and manifold blocks
- Flue‑gas desulfurization (FGD) absorption tower and scrubber key machined parts
- Oil‑gas sour‑gas treatment equipment pressure‑bearing accessories
- Pharmaceutical severe‑corrosion process equipment special components
- Waste‑liquid recovery and environmental‑protection anti‑corrosion mechanical parts
- Heat‑exchanger special alloy nozzles, baffles and custom accessories
- Seawater and brine‑treatment high‑corrosion‑resistance mechanical components
Processing Service
We provide integrated nickel‑alloy blank preparation, heat‑treatment and full‑finish precision machining services, produce finished Hastelloy C276 parts strictly according to customer CAD/PDF drawings: ‑ Qualified Hastelloy C276 bar / forging / plate raw‑material cutting and blanking ‑ Solution annealing and stress‑relief heat‑treatment to eliminate processing residual stress ‑ CNC turning, milling, boring, deep‑hole drilling, thread cutting and special‑profile forming ‑ Deburring, pickling & passivation, protective covering for critical sealing‑surfaces ‑ Dimension sorting and batch marking before shipment
We supply custom Hastelloy C276 machining components for chemical, power‑plant FGD, oil‑gas and environmental‑protection equipment manufacturers worldwide.
Quality Assurance
- 100% UT Ultrasonic Testing for internal raw‑material forging / plate flaws complying with ASTM B564 requirements
- MT Magnetic‑Particle & PT Penetrant Inspection for surface crack detection
- Tensile test & hardness measurement for mechanical‑property verification
- Spectrometer PMI full‑spectrum chemical‑composition analysis for each lot
- High‑precision CMM dimensional inspection for all critical dimensions and tolerances
Mill Test Certificate EN 10204 3.1 can be provided together with shipment documents before delivery. Third‑party inspection witness is available upon request.
Packing & Delivery
Packing ‑ Inner packaging: waterproof anti‑rust plastic film; dedicated protective covers for machined sealing faces and threaded surfaces against scratch, dust and corrosion ‑ Outer packaging: reinforced fumigated heavy‑duty wooden case or high‑strength steel‑frame crate for long‑distance sea transportation ‑ Custom special packaging available on customer request for oversized and heavy‑weight workpieces
Lead Time Normally 25‑45 working days after receipt of advance payment. Exact delivery time depends on workpiece dimension, complexity, machining workload and third‑party inspection schedule.
