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Alloy 59 Sheets & Plates Supplier in Mumbai, India – ASTM B575 UNS N06059
Nicorex Alloys is an ISO 9001 and ISO 14001 certified supplier and stockist of Alloy 59 sheet and plate based in Mumbai, India. We supply these flat products manufactured to ASTM B575 / ASME SB-575.
Alloy 59 (UNS N06059, Werkstoff Nr. 2.4605), also identified by VDM’s trade name Nicrofer 5923 hMo, is a nickel-chromium-molybdenum flat-rolled alloy with a nominal balance of Ni 59%, Cr 23%, and Mo 16%. The tensile strength of this grade is around 690 MPa while its yield strength falls at approximately 340 MPa. What separates Nickel Alloy 59 from every other Ni-Cr-Mo sheet product is its ultra-low carbon ceiling of 0.01% max paired with silicon held to just 0.1% max. The alloy contains no tungsten and limits iron to 1.5% max, virtually eliminating grain-boundary carbide and silicide precipitation during welding.
The PREN of Alloy 59 reaches approximately 76, one of the highest among Ni-Cr-Mo alloys. Cold-rolled sheet covers 1 to 7 mm; hot-rolled plate spans 3 to 55 mm with a max piece weight of 2100 kg. Widths go up to 2500 mm, lengths to 12500 mm. Forms include sheet, plate, strip, coil, clad plate, foil, and perforated sheet. Surface finishes are #1 descaled, pickled, and bright annealed. The melting range falls between 1310–1360°C and density is at 8.6 g/cm³. Alloy 59 carries NACE MR0175/ISO 15156 Level VII approval and BAM certification for hazardous goods transport.
Alloy 59 Sheet & Plate Specifications
| Standards | ASTM B575 / ASME SB-575 |
|---|---|
| CR Sheet Thickness | 1 to 7 mm |
| HR Plate Thickness | 3 to 55 mm |
| Width | Up to 2500 mm |
| Length | Up to 12500 mm |
| Standard Sizes | 1000×2000, 1220×2440, 1500×3000, 2000×4000 mm |
| Condition | Solution Annealed, Descaled/Pickled |
| Edge | Mill, Slit, Sheared |
Chemical Composition of Alloy 59 Sheet & Plate
| Element | Nickel (Ni) | Chromium (Cr) | Molybdenum (Mo) | Iron (Fe) | Aluminium (Al) | Cobalt (Co) | Carbon (C) | Silicon (Si) | Manganese (Mn) | Copper (Cu) | Phosphorus (P) | Sulphur (S) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Composition (%) | Balance (≈59) | 22.0–24.0 | 15.0–16.5 | 1.5 max | 0.1–0.4 | 0.3 max | 0.01 max | 0.1 max | 0.5 max | 0.5 max | 0.015 max | 0.01 max |
Carbon at 0.01% max and silicon at 0.1% max are the lowest ceilings in the Ni-Cr-Mo family. No tungsten and an iron cap of 1.5% further reduce secondary-phase risk. C276 permits W at 3-4.5% and Fe up to 7%; C22 allows W at 2.5-3.5% and Fe up to 6%. These differences give Alloy 59 plate superior thermal stability in as-welded service.
Mechanical Properties of ASTM B575 Alloy 59 Sheet & Plate
| Property | Yield Strength, Rp0.2 (min) | Proof Strength, Rp1.0 (min) | Tensile Strength (min) | Elongation (min) | Impact at –196°C (ISO V) |
|---|---|---|---|---|---|
| Value | 310 MPa (45 ksi) | 380 MPa (55 ksi) | 690 MPa (100 ksi) | 40% | ≥ 225 J/cm² (≥ 180 J) |
Elevated-temperature yield strength (Rp0.2) drops from 290 MPa at 100°C to 175 MPa at 450°C. The cryogenic impact toughness of 225 J/cm² at –196°C makes Alloy 59 sheet suitable for both high-temperature acid service and LNG applications.
Physical Properties of Alloy 59
The physical properties of Alloy 59 (UNS N06059) at room temperature and elevated temperatures are given below.
| Property | Density | Melting Range | Magnetic Permeability | Specific Heat (20°C) | Thermal Conductivity (20°C) | Electrical Resistivity | Modulus of Elasticity | CTE (20–100°C) | Crystal Structure |
|---|---|---|---|---|---|---|---|---|---|
| Value | 8.6 g/cm³ (0.311 lb/in³) | 1310–1360°C (2390–2480°F) | 1.001 | 414 J/kg·K | 10.4 W/m·K | 126 µΩ·cm | 210 GPa (30.5 × 10⁶ psi) | 11.9 × 10⁻⁶/K | FCC (austenitic) |
Alloy 59 Sheet & Plate Equivalent Grades
| Standard | UNS | Werkstoff Nr. | EN | DIN | JIS | GOST |
|---|---|---|---|---|---|---|
| Designation | N06059 | 2.4605 | NiCr23Mo16Al | 17750 / 17744 | SNi6059 | – |
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Available Forms of Alloy 59 Sheet & Plate
Alloy 59 flat products are available in various forms to suit corrosion-resistant fabrication requirements.
Alloy 59 Hot Rolled Plate
Alloy 59 Cold Rolled Sheet
Alloy 59 Strip
Alloy 59 Coil
Alloy 59 Foil
Alloy 59 Clad Plate
Alloy 59 Perforated Sheet
Corrosion Resistance of Alloy 59 Sheet & Plate
Alloy 59 sheet and plate deliver the highest pitting resistance among all Ni-Cr-Mo alloys, with a PREN of approximately 76 (%Cr + 3.3 × %Mo). C276 sits near 69, C22 at roughly 65, and C2000 around 64.
In boiling 10% H₂SO₄, corrosion rate is less than one-third of C276. Hydrochloric acid service, mixed H₂SO₄/HCl condensates in FGD systems, and environments that alternate between oxidising and reducing conditions all fall within this grade’s capability. ASTM G28A results confirm Alloy 59 plate outperforms C276, C2000, and C4. Welded plate retains parent-metal corrosion resistance without PWHT. NACE MR0175/ISO 15156 Level VII covers sour gas applications.
Hot Working, Cold Forming & Heat Treatment of Alloy 59
Hot working takes place at 950 to 1180°C. Place material directly into a furnace at maximum temperature, cool rapidly, and follow with a solution anneal. Cold forming requires the annealed condition. Alloy 59 work-hardens faster than austenitic stainless steels; cold deformation above 15% calls for a final anneal.
Solution annealing runs at 1100 to 1180°C (1120°C preferred). VDM’s retention formula: d ≤ 10 mm → d × 3 min/mm; 10–20 mm → 30 + (d−10) × 2 min; >20 mm → 50 + (d−20) × 1 min. Rapid cooling is mandatory. Welding uses TIG, GMAW, plasma, EB, or SMAW with VDM FM 59 (ERNiCrMo-13) filler. Interpass temperature stays below 120°C. Root argon (Ar 4.6) shielding is required. No PWHT needed.
Industries Using Alloy 59 Sheet & Plate
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FGD scrubber vessels, heat exchanger plates, and agitator blades in power plants rely on Alloy 59 plate for H₂SO₄/HCl condensate service.
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Chemical processing uses include reactor cladding, acid tanks, and evaporators handling acetic acid, HF, and H₂SO₄.
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In oil and gas, NACE Level VII approval qualifies this grade for sour gas components and API 6ACRA wellhead parts.
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A PREN of 76 gives marine and offshore installations resistance to warm-seawater pitting.
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In pharmaceutical production, ultra-low C and Si minimise metallic contamination in high-purity reactor linings.
Alloy 59 Sheet vs Plate – When to Use Which?
| Parameter | Sheet | Plate |
|---|---|---|
| Thickness | 1–7 mm (cold rolled) | 3–55 mm (hot rolled) |
| Finish | Pickled, Bright Annealed | Descaled, Pickled |
| Applications | HX plates, linings, gaskets | FGD vessels, reactor shells, pressure vessels |
| Formability | Higher | Lower |
| Max Piece Weight | – | 2100 kg |
How to Order Alloy 59 Sheet & Plate from Nicorex Alloys
To order Alloy 59 sheet and plate, provide these following details:
- Product Form - Sheet, Plate, Strip, Coil, Foil, Clad Plate
- Thickness - mm
- Width × Length - Sandard or custom
- Quantity - kg, MT, or pieces
- Condition - Solution Annealed, Descaled/Pickled, BA
- Surface Finish - #1, Pickled, BA
- Edge Type - Mill, Slit, Sheared
- Standard - ASTM B575 / ASME SB-575 / VdTÜV 505 / API 5LD for strip
- Additional Testing - TPI, PMI, UT, NACE MR0175
- Test Certificates - EN 10204 3.1 / 3.2
- Packaging Requirements - Standard, export, wooden case
- Delivery Destination - Domestic / Export
Send your inquiry for a quotation within 24 hours. Custom sizes and clad plate available on request.
Frequently Asked Questions
What ASTM Standard Covers Alloy 59 Sheet and Plate?
ASTM B575 / ASME SB-575 covers Alloy 59 (UNS N06059) sheet, plate, and strip. European equivalents are VdTÜV 505 and DIN 17750/17744.
What Makes Alloy 59 Different from Hastelloy C276 in Sheet Form?
Alloy 59 has ultra-low carbon at 0.01% max vs 0.02% for C276, contains no tungsten, and caps iron at 1.5%. The PREN is approximately 76 vs 69 for C276. In boiling 10% H₂SO₄, Alloy 59 corrodes at less than one-third the rate of C276.
Is Alloy 59 Plate Approved for ASME Pressure Vessels?
Yes. ASME SB-575 plates in solution-annealed condition meet ASME BPVC requirements.
Is Alloy 59 Sheet Available in Custom Cut Sizes?
Yes. Nicorex Alloys supplies cut-to-size Alloy 59 sheet and plate by plasma, waterjet, or shearing. Cut-to-length from coil is available for strip.
What is the PREN of Alloy 59?
The PREN of Alloy 59 is approximately 76 (%Cr + 3.3 × %Mo = 23 + 3.3 × 16 ≈ 75.8). C276 sits at roughly 69, C22 at 65, and C2000 near 64.