Hemi Metals, based in Hamilton, New Zealand, is a reliable manufacturer and supplier of Alloy 20 Forgings, designed to withstand harsh conditions with exceptional corrosion resistance in acidic and chloride-heavy environments. Renowned for providing top-notch nickel–iron–chromium alloy solutions, Hemi Metals guarantees that each forging adheres to strict industry standards for strength, durability, and metallurgical consistency. Alloy 20 is particularly prized for its ability to resist sulfuric acid, pitting, and stress-corrosion cracking. Crafted using advanced forging techniques, these components boast impressive mechanical integrity and dimensional stability. Industries trust Hemi Metals for high-performance Alloy 20 forgings tailored for challenging chemical, pharmaceutical, and industrial applications.
Alloy 20 Forgings are composed of about 32–38% nickel, 19–21% chromium, 2–3% molybdenum, along with stabilizing elements like copper (3–4%) and niobium to boost corrosion resistance. This alloy excels in resisting sulfuric acid, chlorides, and stress-corrosion cracking. On the mechanical side, Alloy 20 offers solid tensile and yield strength, impressive toughness, and dependable performance even at high temperatures. Its forged structure enhances fatigue strength, impact resistance, and overall durability. Plus, Alloy 20 is known for its excellent weldability, formability, and metallurgical stability, making it a perfect fit for tough corrosive environments.
| Specifications | ASTM B462, ASME SB462 |
|---|---|
| Standard | DIN, ASTM, BS and all International Standards |
| Flat bar blocks | up to 27″ width and 15,000 lbs |
| Cylinders and sleeves | up to 50″ maximum O.D. and 65″ maximum length |
| Discs and hubs | up to 50″ diameter and 20,000 lbs |
| Rolled, hand forged or mandrel forged rings | up to 84″ maximum O.D. and 40″ maximum length |
| Rounds, shafts and step shafts | up to 144″ maximum length and 20,000 lbs |
| Forging Types | Impression Die Forging, Open Die Forging, Seamless Rolled Forging, Hot Forging, Cold Forging, Open die hammer forging, Impression die drop forging, Closed Die Forging, Press Forging, Upset Forging, Compression Forging, Swaging, Rotary Forging, Roll forging. |
| Grade | C | Mn | Si | S | Cu | Ni | Cr | Fe | Mo | P |
| Alloy 20 | 0.07 max | 2.00 max | 1.00 max | 0.035 max | 3.00 – 4.00 | 32.00 – 38.00 | 19.00 – 21.00 | 29.85 min* | 2.00 – 3.00 | 0.045 max |
| Element | Density | Melting Point | Tensile Strength | Yield Strength (0.2%Offset) | Elongation |
| Alloy 20 | 8.1 g/cm3 | 1443 °C (2430 °F) | Psi -80,000, MPa -551 | Psi – 35,000, MPa – 241 | 30 % |
| STANDARD | WERKSTOFF NR. | UNS | EN | AFNOR |
| Alloy 20 | 2.4660 | N08020 | NiCr20CuMo | Z2NCUD31-20AZ |
Yes, Alloy 20 forgings are highly resistant to corrosion, particularly against sulfuric acid, making them ideal for chemical processing environments. Their excellent resistance ensures durability and longevity in harsh conditions.
The maximum operating temperature for Alloy 20 forgings is typically around 1000°F (537°C). However, it is important to consider application conditions and potential stress factors to ensure optimal performance.
Yes, Alloy 20 forgings can be customized for specific applications. They are tailored to meet unique requirements, offering excellent corrosion resistance, durability, and strength for various industrial uses.
Alloy 20 Forgings find their place in various industries that handle highly corrosive chemicals and challenging processing conditions. Common applications include chemical processing equipment, sulfuric acid plants, heat exchangers, pumps, valves, fasteners, mixing blades, and reactor components. The alloy’s outstanding resistance to pitting and stress-corrosion cracking makes it a go-to choice for pharmaceutical production, food processing, petrochemical systems, and offshore environments. Alloy 20 forgings are also utilized in a range of other demanding applications, showcasing their versatility and reliability.
We provide products that come with both mill test certificates and third-party test certificates, ensuring the highest standards of quality and compliance.
Hemi Metals is a leading manufacturer, supplier, and exporter of high-quality bars, rods, and forgings, catering to various industries in Hamilton New Zealand
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