N6 Nickel Bar For Steam Turbine
Nickel-based alloy is a kind of alloy which is widely used and has the highest high temperature strength in superalloys. The main reasons are: first, more alloying elements can be dissolved in the nickel-based alloy, and the structure stability can be maintained. Second, a coherent ordered A3B intermetallic compound γ'[Ni3(Al, Ti)] phase can be formed to strengthen the alloy effectively.
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Description
Gnee Steel (Tianjin) Co., Ltd. is one of the most professional manufacturers and suppliers of n6 nickel bar for steam turbine in China. With abundant experience, we warmly welcome you to wholesale customized n6 nickel bar for steam turbine from our factory. For price consultation, contact us.
N6 pure nickel rods (JIS H4000 / ASTM B160, Ni ≥ 99.6%) offer irreplaceable advantages in the steam turbine sector. They feature high thermal conductivity (up to 90 W/m·K)-approximately four times that of austenitic stainless steel-and exhibit an oxidation weight gain rate of <0.5 mg/dm²·h in 600°C steam environments, far lower than that of 316L (>2 mg/dm²·h). In the annealed state, they possess a tensile strength of ≥414 MPa, a yield strength of ≥207 MPa, and an elongation of ≥30%; this combination of high strength and excellent ductility allows them to withstand the centrifugal stresses generated by high-speed turbine rotor rotation. Their non-magnetic properties make them suitable for use in sensors and electrical interface areas, while their complete immunity to stress corrosion cracking (SCC) eliminates the risk of brittle fracture associated with stainless steel in chloride-containing steam media. Typical applications include high-temperature bolts, sealing rings, thermocouple protection tubes, and heat exchanger tube sheets for steam turbines.
We supply N6 pure nickel rods (round, flat, or square) with outer diameters of φ6–200 mm and fixed lengths of 1,000–6,000 mm, manufactured in accordance with JIS H4000, ASTM B160, and EN 16537 standards. Chemical composition specifications are: Ni ≥ 99.6%, Fe ≤ 0.25%, C ≤ 0.25%, and S ≤ 0.05%. Annealed hardness is ≤75 HRB, and surface treatment (pickling and passivation) ensures a free iron content of <50 ppm (Ferroxyl test negative). Each batch is supplied with an EN 10204 3.1 Material Test Certificate (MTC) and an OES chemical composition report; piece-by-piece verification via PMI (XRF) is supported. Lead times are 7 days for stock items and 30–45 days for custom orders; shipping is available from Shanghai, Tianjin, and Qingdao ports, serving over 200 countries and regions.
N6 Nickel Bar for Steam Turbine Specification
| Item | Detail |
| Product | Pure Nickel Round / Flat / Square / Hex Bar |
| Grade | N6 (JIS) / Nickel 200 (UNS N02200) |
| Governing Standards | ASTM B160 / ASME SB160 / JIS H4000 / GB/T 2054 / EN 16537 / AMS 4027 |
| Equivalent Grades | 2.4066 (EN), NW 2200 (JIS), Ni 99.2 (BS), N-100M (AFNOR), НП-2 (GOST) |
| Crystal Structure | FCC (Face-Centered Cubic) |
| Magnetic Property | Ferromagnetic below Curie temp (360 °C / 680 °F); non-magnetic above Curie temp |
| Max Service Temperature (steam turbine) | 595 – 705 °C (1,100 – 1,300 °F) |
| Surface Finish | Bright / Peeled / Polished / Turned / Acid Pickled (AP) |
| Manufacturing Process | Hot rolling / forging → cold drawing / machining → annealing → acid pickling |
Chemical Composition (wt.%)
| Element | JIS H4000 N6 | ASTM B160 (N02200) |
| Ni | ≥ 99.6 | Bal. (≥ 99.0) |
| Fe | ≤ 0.25 | ≤ 0.40 |
| C | ≤ 0.25 | ≤ 0.15 |
| Mn | ≤ 0.35 | ≤ 0.35 |
| Si | ≤ 0.35 | ≤ 0.10 |
| Cu | ≤ 0.25 | ≤ 0.25 |
| S | ≤ 0.05 | ≤ 0.01 |
| P | ≤ 0.02 | ≤ 0.02 |
Mechanical Properties
Annealed Condition (ASTM B160)
| Property | Metric | Imperial |
| Tensile Strength, Rm (min) | 415 MPa | 60,000 psi |
| Yield Strength, Rp0.2 (min) | 105 MPa | 15,000 psi |
| Elongation in 50 mm / 2″ (min) | 35% | 35% |
| Reduction of Area (typ.) | ≥ 50% | ≥ 50% |
| Hardness (max) | HBW 102 / HRB 45 | B45 |
| Impact Energy (Charpy V, 20 °C) | ≥ 60 J | ≥ 44 ft·lb |
Cold-Worked Condition (ASTM B160)
| Diameter / Size | Tensile, Rm (min) | Yield, Rp0.2 (min) | Elongation (min) | Hardness (max) |
| Rounds ≤ 25.4 mm (1″) | 550 MPa (80,000 psi) | 415 MPa (60,000 psi) | 10% | B80 |
| Rounds 25.4 – 101.6 mm (1″ – 4″) | 515 MPa (75,000 psi) | 345 MPa (50,000 psi) | 15% | B80 |
| Squares / Hex / Rect, all sizes | 450 MPa (65,000 psi) | 275 MPa (40,000 psi) | 25% | B80 |
High-Temperature Mechanical Properties (Annealed)
| Temperature | Tensile, Rm (MPa) | Yield, Rp0.2 (MPa) | Elongation (%) |
| 20 °C (68 °F) | 415 | 105 | 35 |
| 400 °C (752 °F) | 345 | 85 | 45 |
| 600 °C (1,112 °F) | 275 | 65 | 50 |
| 700 °C (1,292 °F) | 225 | 50 | 55 |
Dimensions & Tolerances
Round Bar
| Diameter Range (mm) | Diameter Range (in) | Diameter Tolerance (mm) | Diameter Tolerance (in) | Straightness | Surface Roughness (Ra) |
| 6 – 25 | ¼″ – 1″ | ± 0.10 | ± 0.004 | ≤ 0.13 mm/m | ≤ 32 µin (0.8 µm) |
| 25 – 50 | 1″ – 2″ | ± 0.15 | ± 0.006 | ≤ 0.13 mm/m | ≤ 32 µin (0.8 µm) |
| 50 – 100 | 2″ – 4″ | ± 0.25 | ± 0.010 | ≤ 0.25 mm/m | ≤ 63 µin (1.6 µm) |
| 100 – 200 | 4″ – 8″ | ± 0.40 | ± 0.016 | ≤ 0.25 mm/m | ≤ 63 µin (1.6 µm) |
| 200 – 350 | 8″ – 14″ | ± 0.50 | ± 0.020 | ≤ 0.50 mm/m | ≤ 125 µin (3.2 µm) |
Flat / Square / Hex Bar
| Dimension (mm) | Dimension (in) | Tolerance (mm) | Tolerance (in) |
| 6 – 25 | ¼″ – 1″ | ± 0.10 | ± 0.004 |
| 25 – 50 | 1″ – 2″ | ± 0.15 | ± 0.006 |
| 50 – 100 | 2″ – 4″ | ± 0.25 | ± 0.010 |
| 100 – 200 | 4″ – 8″ | ± 0.40 | ± 0.016 |
Lengths
| Type | Range (mm) | Range (ft) |
| Single random | 1,000 – 3,000 | 3.3 – 10 |
| Double random | 3,000 – 6,000 | 10 – 20 |
| Cut-to-length | Per customer spec (± 3 mm) | Per customer spec (± ⅛″) |
Heat Treatment
| Condition | Temperature (°C) | Temperature (°F) | Cooling |
| Annealing (final) | 1,050 – 1,100 | 1,922 – 2,012 | Air cool or furnace cool (slow) |
| Stress Relief | 400 – 500 | 752 – 932 | Air cool |
Note: Nickel 200 is not heat-treatable (no precipitation hardening). Annealing is performed to restore ductility after cold working. Quenching is not necessary except to shorten cycle time or reduce surface oxide.
FAQ
1.Can you keep the unit price unchanged as last time?
The price of our products fluctuates according to the price of raw material , maybe rise or fall,Even there are great fluctuates, we will try to keep our best price for you.
2.What products do you mainly supply?
We mainly supply tungsten, molybdenum, titanium, tantalum, niobium and their alloy products.
3.What's the quality control in your company?
We have ISO 9001:2015 certificate, we must inspect our production strictly by our QC before shipping.
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