George Metals, headquartered in Houston, USA, is a preeminent manufacturer and distributor of Nilo Alloy 42 bars and rods, furnishing precision-crafted materials for demanding applications calling for dimensional integrity and controlled thermal expansion. Renowned for world-class quality and customer service, George Metals offers Nilo 42 in different sizes and finishes to satisfy stringent industry standards. Their rods and bars are produced to meet international standards such as ASTM F30, guaranteeing mechanical and thermal properties that are consistent. Catering to industries such as medical, aerospace, electronics, and automotive, George Metals is a reliable ally for high-performance nickel-iron alloy solutions within the United States.
Nilo Alloy 42 bars and rods contain nearly 42% nickel and the remainder iron, trace amounts of carbon (≤0.05%), manganese (≤0.80%), silicon (≤0.30%), and trace impurities such as chromium, aluminum, phosphorus, and sulfur. Nilo Alloy 42 is prized for its low coefficient of thermal expansion, generally about 4.5–6.5 µm/m·°C to 300°C, comparable to that of some glasses and ceramics. Mechanical properties are tensile strength of ~490–517 MPa, yield strength ~250–276 MPa, and elongation of 30–43%, providing superior formability and stability. The same are ideal for high-precision thermal-sensitive applications in advanced engineering disciplines.
Dimension : EN, DIN, JIS, ASTM, BS, ASME, AISI
Grade : Nilo Alloy 42 (UNS No. K94100) Round Bars 1.3917
Finish : Black, Bright Polished, Rough Turned, NO.4 Finish, Matt Finish, BA Finish
Form : Round, Square, Hex (A/F), Rectangle, Billet, Ingot, Forging Etc.
Surface : Hot Rolled Pickled or Sand Blasting Finished, Cold Drawn, Bright, Polished, Hairline
Application : Chemical process, Food processing, Petrochemical, Pollution control, Pulp and Paper, Refining
Condition : Cold Drawnd Pulished Cold Drawn Centreless Ground & Polished.
Our Nilo Alloy 42 Round Bars conforms to NACE MR0175/ISO 15156
| Grade | C | Mn | P | S | Si | Ni | Cr | Fe |
| Nilo Alloy 42 | 0.05 max | 0.80 max | 0.025 max | 0.025 max | 0.030 max | 41 min | 0.250 max | Bal |
| Material | Condition | Tensile Strength | Yield Strength (0.2% Offset) | Elongation (%) | ||
| psi | MPa | psi | MPa | |||
| Alloy 42 (Nilo 42) | Annealed | 71,000 | 490 | 36,000 | 250 | 43 |
| STANDARD | WERKSTOFF NR. | UNS |
| Nilo Alloy 42 | 1.3917 | K94100 |






We provide products that come with both mill test certificates and third-party test certificates, ensuring the highest standards of quality and compliance.
George Metals is a leading manufacturer, supplier, and exporter of high-quality bars, rods, and forgings, catering to various industries in Houston, USA
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