• Solid-solution strengthened Inconel 625 solid shaft, UNS N06625, EN 2.4856, fully compliant with ASTM B446 bar standard
• Mo & Nb composite solid-solution hardening delivers high strength without aging heat treatment
• Certified to NACE MR0175 standard, outstanding anti-SCC performance for sour oil & gas service
• Stable mechanical & oxidation performance from cryogenic -196℃ up to 980℃ continuous operation
• Excellent resistance to chloride pitting, crevice corrosion, mixed acid & seawater erosion
• Homogeneous single-phase austenite matrix, no carbide precipitation after welding or thermal cycles
• Hot rolled / cold drawn stock, custom diameter & full CNC turning, grooving, threading per CAD drawings
• Premium shaft blank for aerospace, subsea, nuclear power and heavy chemical rotating equipment

This series of Inconel 625 solid shafts are manufactured via hot rolling + cold drawing forming processes. Two standard heat treatment grades are available: Grade 1 Low-Temp Solution Annealed for general corrosion service; Grade 2 High-Temp Solution Annealed for high-temperature creep resistant working conditions.

Inconel 625 is classic solid-solution nickel superalloy strengthened by molybdenum and niobium elements. It combines ultra-high mechanical strength and full-spectrum corrosion resistance, outperforming duplex and austenitic stainless steel in harsh high-temperature & chloride media. Solid shaft blanks eliminate complex forging pre-processing, directly machined into pump shafts, valve stems, subsea rotating spindles, aerospace turbine shafts and nuclear equipment transmission shafts for aerospace, offshore oil & gas, nuclear power, chemical and desalination industries.

• Ni-Cr-Mo-Nb single-phase solid-solution alloy, strength obtained without precipitation aging
• High molybdenum & niobium content greatly improves pitting resistance in brine and sour gas
• Dense chromium oxide film maintains oxidation resistance under long-term high-temperature circulation
• Retains full ductility and impact toughness at ultra-low cryogenic temperatures
• No intergranular sensitization after welding; no mandatory post-weld heat treatment required
• Good hot rolling, cold drawing and CNC machinability for all kinds of rotary shaft parts

• Inconel Series: 600, 601, 625, 690, 718, X-750, HX
• Incoloy Series: 800, 800H, 800HT, 825, 925, G-3
• Hastelloy Series: C4, C22, C276, C2000, B2, B3, G35
• Monel & Pure Nickel: Monel 400/K500, Nickel 200 / 201
• Duplex Stainless Steel: 2205, 2507, S32750, F51
• Austenitic Stainless Steel: 304, 316L, 904L, 254SMo
• Martensitic Stainless Steel: 410, 420, 431, 440C
• Alloy Steel: 4140, 4340, F22, F91, A105

1. 1 Solid-Solution High Strength Without Aging

   Mo-Nb elements deliver inherent high strength after solution annealing, skip extra aging heat treatment, simplify shaft processing workflow.

2. 2 NACE Compliant Sour Gas Resistance

   Excellent sulfide stress cracking resistance, safe for subsea and H₂S-containing oil & gas rotating shafts.

3. 3 Ultra-Wide Temperature Stability

   Maintain consistent strength, toughness & anti-oxidation performance from cryogenic to high-temperature furnace service.

4. 4 Full-Spectrum Corrosion Protection

   Resist seawater, brine, mixed mineral acids & hot alkali, replace multiple stainless steel grades in one material.

5. 5 Stable Welded Metallurgy

   No harmful carbide segregation during welding; welded shaft assemblies retain full corrosion resistance.

• Aerospace jet engine turbine shafts, exhaust rotating spindle blanks
• Offshore subsea pump shafts, wellhead valve stems & rotary sealing spindles
• Sour oil & gas downhole transmission shafts, high-pressure valve rods
• Nuclear power reactor control shafts, heat exchanger rotating components
• Chemical high-temperature reactor agitator shafts, acid pump spindles
• Seawater desalination circulating pump main shafts
• Industrial high-temperature furnace roller shafts

We provide integrated hot rolling & cold drawing production, full CNC precision turning service per customer CAD/PDF drawings:

• Custom fixed-length cutting, facing, centering, external turning & chamfering
• Precision grooving, threading, spline machining, surface grinding & polishing
• Grade1 / Grade2 custom solution annealing heat treatment
• Pickling, bright annealing, passivation surface finishing

We supply Inconel 625 solid shaft blanks & finished machined shafts for aerospace, offshore, nuclear and chemical global industrial clients.

• 100% UT ultrasonic inspection to detect internal rolling defects & segregation
• Full batch tensile, yield & hardness mechanical testing per heat lot
• High-precision micrometer to control diameter straightness tolerance
• Spectrometer full spectrum chemical composition verification
• Metallographic single-phase austenite microstructure inspection

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