Nickel 200 Forged Rings manufactured at TorqBolt are corrosion resistant,high temperature resistant with ultimate tensile strength.
Dimensional standards as per DIN 471,DIN 472,DIN 5417,DIN 983,AS 568,BS 1806,ISO 3601,DIN 3771 are provided.
The raw material of these fasteners is renowned as registered trademarks like Inconel,Incoloy,Incoloy Alloys. Being a PED certified Fasteners Manufacturer by TUV Rheinland,our fasteners are accompanied with EN 10204 3.1/3.2 certification. Nickel 200 Forged Rings are available in hot forged,cold forged and bar stock machined conditions depending upon the order quantity.
Nickel 200 Forged Rings — Forged Ring Specifications
Nickel 200 Forged rings are seamless rolled or open-die forged components used as pressure-vessel flanges, valve bodies, hub-mount blanks, and shaft-end retention rings. TorqBolt supplies Nickel 200 Forged rings per ASTM A182 (forged flange standard), ASTM A266/A668 (carbon ring), and EN 10222 (pressure-purpose forging), in OD sizes from 50 mm up to 3000 mm.
Forging Process
Rings are produced via either seamless ring rolling (radial-axial mill, for OD > 200 mm) or open-die hammer forging (for short-run / oversize parts). Reduction ratio ≥ 4:1 from billet to final ring is enforced for grain-flow continuity. Heat treatment is per the alloy spec — solution-anneal + quench + age for precipitation-hardening alloys; quench & temper for low-alloy steels.
Dimensional Tolerance
Nickel 200 Forged rings are supplied to ASTM A788 dimensional tolerances by default: OD ±1.5 mm or ±1% (whichever is larger), ID ±1.5 mm, height ±0.8 mm. Tighter tolerances (machined finish, ±0.1 mm) available for direct-mount applications. Out-of-roundness controlled to 1.5 mm; concentricity 0.2 mm/100 mm.
Mechanical Testing
Each ring lot ships with full mechanical certification: tensile (ASTM E8), Charpy impact (ASTM E23) at the application's MDMT, hardness traverse, and grain size per ASTM E112. For Nickel 200 Forged ring stock destined for hydrogen / sour service, additional HIC testing (NACE TM0284) and SSC testing (NACE TM0177) per the customer's spec.
Surface & Inspection
Nickel 200 Forged rings ship rough-machined or finish-machined per drawing. Standard NDT: 100 % UT (ASTM A388 reference) and surface MT/PT to ASTM E709 / E165. Radiography on request. Each ring is hard-stamped with heat number, lot, and certification reference for traceability through the dispatch chain.
Pure & Low-Alloyed Nickel
Commercially-pure nickel grades (UNS N02200, N02201) are used where the application demands maximum nickel chemistry purity: electrical conductivity, magnetostriction, hot-caustic resistance, or food / pharmaceutical contact. Pure nickel is non-magnetic above its Curie point, weldable without filler in thin sections, and resistant to dry chlorine, fluorine, and hot caustic solutions where stainless steels fail.
Nickel 200 (N02200, >99% Ni, max 0.15% C) is the general-purpose grade for chemical-process and electroplating equipment. Nickel 201 (N02201, max 0.02% C) is the low-carbon variant required for service above 315°C to prevent graphitization that would destroy mechanical properties. Nickel 205 is the magnetic-grade variant. Nickel 270 (N02270) is high-purity electronics grade.
Pure nickel fasteners are supplied per ASTM B160 (rod/bar) and AMS 4730 with EN 10204 3.1 / 3.2 certificates including chemistry, hardness (HV 100-160 annealed, up to 250 cold-worked), and tensile testing. NACE MR0175 sour-service is qualified in the annealed condition. Welding uses pure-nickel filler (ENi-1) with copper-oxide-free flux to prevent weld embrittlement.
