Nickel Base Alloys — Inconel, Incoloy, Monel & Hastelloy Plate, Pipe, Bar & Tube | MESCO

Nickel Base Alloys — Inconel, Incoloy, Monel & Hastelloy Plate, Pipe, Bar & Tube

One sourcing point for thirteen high-nickel grades. From sour-service oilfield to 982 °C gas-turbine exhaust, MESCO supplies Inconel, Incoloy, Monel, Hastelloy and Fe-Ni alloys to ASTM, ASME, EN and DIN specifications with EN 10204 3.1 mill test certificates and project-engineering support.

• 13 grades across 5 alloy families, multi-plate consolidation
• Full traceability with EN 10204 3.1 / 3.2 mill test certificate and 100 % PMI
• Mill-direct pricing with mixed-form container consolidation for export buyers

What Are Nickel Base Alloys?

Nickel base alloys are metallic materials in which nickel — typically 30 % to 76 % by composition — forms the primary metallic matrix. The nickel lattice carries chromium, molybdenum, iron, copper, titanium, aluminium and niobium additions that together resist heat, creep, pitting, chloride stress-corrosion cracking and reducing-acid attack. Where pure stainless steel cannot survive in many refinery, marine, sour-service, nuclear and gas-turbine environments, engineers select nickel-base alloys for the most demanding service conditions in modern process plants.

Five commercial families dominate the export trade:

• Ni-Cr-Fe — Inconel 600 / 601, Incoloy 800 — high-temperature oxidation resistance.
• Ni-Cr-Mo — Inconel 625, Hastelloy C-276 — wet-process and chloride SCC resistance.
• Ni-Fe-Cr — Incoloy 800 / 825, Incoloy 8020 — heat and corrosion balance at moderate nickel cost.
• Ni-Cu — Monel 400 / K-500 — hydrofluoric acid, brine and seawater service.
• Fe-Ni superalloys — A286, Alloy 901 — age-hardenable strength for turbine discs, shafts and fasteners.

Alloy Family at a Glance

Each family is engineered for a different dominant service. The matrix below summarises the trade-off a buyer must weigh when sourcing nickel alloy against stainless steel or carbon steel.

Grades We Supply — Specifications Reference

The table below lists standard specifications and reference mechanical / temperature limits for the thirteen grades we ship from stock or mill. Mechanical values are typical reference figures; final acceptance shall be against the specification in your purchase order.

Product Forms & Dimensional Capability

MESCO delivers nickel base alloys in eight standard forms. Dimensional tolerances follow the ASTM / ASME specification listed against each form. Custom sizes outside of the standard range are quoted against your drawing.

• Plate / Sheet — ASTM B168 / B443 / B463; thickness 0.5 mm to 100 mm; width 1000 mm to 2500 mm; length up to 6000 mm; surface mill, pickled, polished or bright annealed.
• Pipe (Seamless) — ASTM B163 / B167 / B423 / B444 / B575 / B622; OD 6 mm to 168 mm; wall 0.5 mm to 24 mm; solution-annealed condition.
• Tube (Welded) — ASTM B626 / B675; OD 6 mm to 1200 mm; wall per spec; U-bend and straight lengths.
• Bar / Rod — ASTM B166 / B446 / B637; round, square, hex; dia 6 mm to 300 mm; hot-finished or cold-drawn.
• Strip / Coil — ASTM B168 / B443; thickness 0.1 mm to 3 mm; coil ID 300 / 400 / 500 mm.
• Wire — ASTM B166 / B164; dia 0.1 mm to 12 mm; spool or coil pack.
• Fittings — ASTM B366 (WPB / WPC / WP276 / WP625); elbows, tees, reducers, stub-ends in matching grades.
• Forgings — ASTM B564 / B462; flanges, rings, discs, hubs and custom shapes.

Applications by Industry

Nickel base alloys are sold into environments where ordinary stainless steel cannot survive. Below are the six service windows our export orders feed most often.

• Oil & Gas (Upstream and Downstream) — downhole tubular, christmas-tree bodies, hydrocracker reactor internals, sour-service per NACE MR0175 / ISO 15156.
• Chemical & Petrochemical — HF alkylation (Monel 400), sulphuric-acid coolers (Incoloy 825), hot nitric acid (Inconel 600 / 601), wet H2S service (Hastelloy C-276).
• Marine & Offshore — seawater pump shafts (Monel K-500), propeller shafts, plate heat exchangers, splash-zone sheathing.
• Nuclear Power — steam-generator tubes (Incoloy 800), reactor core fasteners (A286), reactor internals.
• Aerospace & Gas Turbine — turbine discs and shafts (A286 / Alloy 901), combustion liners (Inconel 601), after-burner components (Inconel 625), seal rings and fasteners (Inconel 718 / X-750).
• Pollution Control & Power Generation — FGD absorber internals (Hastelloy C-276), waste-heat boilers (Incoloy 800 / 825), coal-fired superheater supports.

Quality Control & Certification

Every shipment from MESCO’s nickel-alloy programme is supported by a full traceability dossier. The list below documents what arrives in the document packet when a buyer takes delivery.

• EN 10204 Mill Test Certificate 3.1 — chemistry and mechanical results, signed by the mill quality department.
• EN 10204 3.2 Certificate — third-party witnessed inspection available on request (TÜV, SGS, BV, DNV).
• Positive Material Identification (PMI) — 100 % PMI on every heat using XRF to verify UNS chemistry before shipment.
• Mechanical testing — tensile, hardness, grain size per ASTM E8 / E112 / E18 where the specification requires.
• Corrosion testing — ASTM G48 (pitting / crevice), ASTM A262 (intergranular for austenitic grades), available on request.
• Non-destructive testing — 100 % ultrasonic testing (ASTM A388 / A577), hydrostatic test on pipe (ASTM B163), dye-penetrant on fittings.
• Traceability — every piece marked with heat number, grade, size and works order; full chain retained for ten years.

Why Choose MESCO for Nickel Base Alloys

1. Family coverage under one PO. Thirteen grades across five families let you consolidate mixed-form orders instead of opening four.
2. Standard-and-grade depth. Every order is matched against the ASTM, ASME or EN standard in your purchase order; substandard material is not shipped.
3. Export-engineering support. Pre-shipment samples, third-party inspection, certificate-of-origin and fumigation are bundled into our standard shipping terms.
4. Mill-direct pricing. Pricing is built against mill cost plus a transparent conversion margin; you see the same reference price the mill quotes.

Frequently Asked Questions

What is the minimum order quantity (MOQ)?

MOQ is negotiable. As a practical guideline, plate / sheet items typically start at 50–200 kg, pipe / tube at 50–500 kg, bar at 100–500 kg. Stock lots can be split; mill orders follow minimum mill run quantities. Confirm with our sales team against your grade, form and quantity.

What is the typical lead time?

Ex-stock items ship within seven days of PO. Mill orders for plate and sheet typically run four to six weeks; pipe and bar four to eight weeks; forgings and fittings eight to ten weeks. Final lead time is confirmed against the mill schedule at quotation.

Do you provide Positive Material Identification (PMI)?

Yes. Every nickel-alloy heat is subjected to XRF PMI on the floor before shipment, and the result is recorded against the mill certificate. Witnessed PMI by third-party inspector is available on request.

Are your materials compliant with NACE MR0175 / ISO 15156 for sour service?

Inconel 625, Hastelloy C-276, Incoloy 825 and Monel K-500 are commonly delivered in NACE MR0175 / ISO 15156 sour-service condition. We document the limit (e.g. H2S partial pressure, temperature, chloride) in the mill certificate. Final acceptance is the buyer’s responsibility against their project specification.

What export documents do you provide?

Standard documents include commercial invoice, packing list, EN 10204 3.1 MTC, certificate of origin, fumigation certificate, and insurance policy. Third-party inspection certificates (TÜV, SGS, BV, DNV) and consular legalisation are available on request.

What warranty do you offer?

MESCO warrants that the material supplied conforms to the specification in the purchase order, supported by the mill certificate. Warranty period, claims procedure and limitation of liability are set out in our standard sales terms.