Alloy 59 Round Bars Supplier in Mumbai, India
Nicorex Alloys is an ISO 9001 / ISO 14001 certified supplier and stockist of Alloy 59 round bars based in Mumbai, India. We supply these round bars according to the ASTM B574 / ASME SB574 standard.
Nickel Alloy 59 (UNS N06059, Werkstoff 2.4605, EN NiCr23Mo16Al) is an ultra-low-carbon, ultra-low-silicon nickel-chromium-molybdenum alloy. Developed by VDM Metals as Nicrofer 5923 hMo, this grade holds the lowest carbon (≤0.01%) and silicon (≤0.10%) of any Ni-Cr-Mo alloy, which virtually eliminates grain boundary precipitation during welding and hot working. Nominal composition consists of Ni ~59%, Cr 22–24%, Mo 15–16.5%, Fe ≤1.5%. The high molybdenum and high chromium combination resists both oxidising and reducing acids. Minimum yield strength reaches up to 340 MPa (49.3 ksi). Alloy 59 round bar is NACE MR-01-75 / ISO 15156 Level VII approved for the most demanding sour service. It is also BAM approved for hazardous goods transport.
Diameters of UNS N06059 round bar span from 3–500 mm in lengths to 6000 mm. Forms include round bar, hex bar, flat bar, square bar, rectangular bar, forged bar, hollow bar, and rods. We supply them in conditions like solution annealed at 1130–1160°C with water quench. Cold-worked bars are also available as per ASTM B574 (6.35–88.9 mm). Surface finishes include black, bright, peeled, ground, polished. ISO-V impact at –196°C exceeds 200 J/cm², suited for LNG and cryogenic duty. Melting range is 1310–1360°C. Alloy 59 density is 8.60 g/cm³. Key industries include flue gas desulfurisation, chemical processing, marine & offshore, geothermal energy, pharmaceutical, and ship diesel engines.
Alloy 59 Round Bar Specifications
| Specification | ASTM B574 / ASME SB574; DIN 17752; VdTÜV 505 |
|---|---|
| Diameter | 3 – 500 mm; Hex 2–100 mm A/F; Square 4–100 mm |
| Length | 100 – 6000 mm |
| Condition | Solution Annealed (1130–1160°C, water quench); Cold Worked |
| Surface | Black, Bright, Peeled, Ground, Polished |
| Tolerance | h8 – h13 |
| Cold Worked Range | 6.35 – 88.9 mm dia per ASTM B574 |
Alloy 59 vs Hastelloy C276 vs Hastelloy C22 – Round Bar Selection Guide
| Parameter | Alloy 59 | C276 | C22 |
|---|---|---|---|
| UNS | N06059 | N10276 | N06022 |
| Cr / Mo (%) | 22–24 / 15–16.5 | 14.5–16.5 / 15–17 | 20–22.5 / 12.5–14.5 |
| Tungsten | None | 3–4.5% | 2.5–3.5% |
| C max / Si max | 0.01 / 0.10 | 0.01 / 0.08 | 0.015 / 0.08 |
| Yield (MPa) | 340 | 283 | 310 |
| Thermal Stability | Best | Good | Good |
| NACE Level | VII | IV | IV |
Chemical Composition of Alloy 59 Round Bars
Mechanical performance characteristics of Hastelloy X alloy in the solution heat-treated condition, including strength and behaviour under elevated temperatures:
| Element | Nickel (Ni) | Chromium (Cr) | Molybdenum (Mo) | Iron (Fe) | Aluminium (Al) | Silicon (Si) | Carbon (C) | Cobalt (Co) | Phosphorus (P) | Sulphur (S) |
|---|---|---|---|---|---|---|---|---|---|---|
| Content (wt%) | Balance | 22.0 – 24.0 | 15.0 – 16.5 | 1.5 max | 0.1 – 0.4 | 0.10 max | 0.01 max | 0.3 max | 0.015 max | 0.01 max |
Mechanical Properties of Alloy 59 Round Bars and Rods
| Property | Tensile (min) | Yield Rp0.2 (min) | Elongation (min) | Impact –196°C |
|---|---|---|---|---|
| Sol. Annealed | 690 MPa (100 ksi) | 340 MPa (49.3 ksi) | 40% | ≥200 J/cm² |
| Cold Worked | 862 MPa (125 ksi) | 690 MPa (100 ksi) | 15% | – |
Alloy 59 holds the highest minimum yield (340 MPa) among standard Ni-Cr-Mo corrosion alloy bars: C22 at 310 MPa, C276 at 283 MPa, and C2000 at 276 MPa. Cryogenic impact at –196°C exceeds 200 J/cm², suited for LNG service.
Alloy 59 Round Bar Equivalent Grades
| Standard | UNS / Werkstoff | DIN / VdTÜV | EN | JIS |
|---|---|---|---|---|
| Designation | N06059 / 2.4605 | 17752 / 505 | NiCr23Mo16Al | B2220 |
Physical Properties of Alloy 59 Bars
| Property | Density | Melting Range | Elastic Modulus | Thermal Conductivity (20°C) | Thermal Expansion (20–100°C) | Electrical Resistivity (20°C) |
|---|---|---|---|---|---|---|
| Value | 8.60 | 1310–1360 | 210 | 10.4 | 11.9 × 10⁻⁶ | 1.26 |
| Unit | g/cm³ | °C | GPa | W/m·°C | /°C | µΩ·m |
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Available Forms of Alloy 59 Bar Stock
Alloy 59 Round Bar
Nicrofer 5923 Hex Bar
Nickel Alloy 59 Flat Bar
UNS N06059 Square Bar
Alloy 59 Forged Round Bar
2.4605 Hollow Bar
Alloy 59 Rods
Alloy 59 Rectangular Bar
Machining, Hot Working & Heat Treatment of Alloy 59 Round Bars
Alloy 59 machining is similar to other Ni-Cr-Mo alloys. It uses fresh carbide inserts with flood coolant and positive rake angles. Hot work at 1180–950°C with rapid water or air cooling. Clean surfaces before heating; avoid sulphur, lead, or phosphorus contamination.
Solution anneal at 1130–1160°C, then water quench. Weld by GTAW, GMAW, or SMAW using ERNiCrMo-13 (AWS A5.14) matching filler. Ultra-low Si and C give very low hot-crack susceptibility. Alloy 59 maintains full corrosion resistance in the as-welded condition without PWHT.
Industrial Applications of Alloy 59 Round Bars
- Scrubber shafts, damper mechanisms, agitators, and heat exchanger parts. Preferred over C276 for new FGD installations.
- Reactor internals for plants alternating between acid batches.
- Pump shafts and fasteners per NACE Level VII for the most demanding sour service.
- Alloy 59 round bar for hot, acidic, chloride-rich brine systems.
- Reactor shafts for cGMP-compliant equipment.
- Marine SOx exhaust scrubber internals handling H₂SO₃/HCl condensate.
How to Order Alloy 59 Round Bars from Nicorex Alloys
- Bar Form - Round Bar, Hex Bar, Flat Bar
- Diameter - Diameter × Length in mm or inches
- Material Grade - Alloy 59 / UNS N06059
- Standard - ASTM B574 / ASME SB574 / DIN 17752
- Surface Finish - Black, Bright, Polished, Centreless Ground, Peeled
- Condition - Solution Annealed
- Tolerance - h9, h11 or as per requirement
- Quantity - Number of pieces, kg, or MT
- Additional Requirements - NACE MR0175 compliance, specific heat numbers, chemical processing / FGD service
- Documentation -MTC 3.1 per EN 10204, PMI report, third-party inspection certificate
- Packaging - Standard wooden box / export-grade sea-worthy packing / ISPM 15 compliant
- Delivery Destination - Domestic India / international export
Frequently Asked Questions
What Makes Alloy 59 Different from Hastelloy C276?
Can Alloy 59 Bars be Cold-Worked for High-Strength Applications?
Yes. ASTM B574 covers cold-finished bars (6.35–88.9 mm) with ≥862 MPa tensile and ≥690 MPa yield. They are suited for high-strength fasteners in sour service.
What ASTM Standard Covers Alloy 59 Bar?
ASTM B574 / ASME SB574 covers Alloy 59 bar. DIN 17752 and VdTÜV 505 also apply. Cold-worked bars are explicitly covered.
What Welding Filler Is Used for Alloy 59 Bar Joints?
ERNiCrMo-13 (AWS A5.14) matching filler for GTAW. It has a low hot-crack susceptibility due to ultra-low Si and C. GTAW (TIG) is preferred. Can be used as-welded without losing corrosion resistance.
What is the Price of Alloy 59 Round Bar per kg in India?
The price of Alloy 59 round bar typically ranges from ₹5,500–10,000+ per kg, depending on diameter, condition, and testing scope. It costs more than C276/C22 due to ultra-low impurity requirements. Contact Nicorex Alloys for current pricing.