When a leading process plant faced recurring heater failures and element scaling under repeated thermal cycling, they turned to NiCr 40:20 Round Bars to ensure longer life and safer operations. Engineered for sustained high-temperature service, these bars are the trusted materials for engineers, fabricators, and procurement heads in chemical, oil & gas, marine, pharma, and power sectors aiming for higher efficiency and reduced downtime.
Table of Contents:
NiCr 40:20 contains about 40% nickel and nearly 20% chromium with the balance iron, plus silicon and manganese additions. That balance is a cost-optimised resistance heating alloy: it keeps enough chromium for a protective oxide at furnace temperature while trading nickel for iron, which is what makes it the economical choice of the family. Its high electrical resistivity and form stability under cycling make it suited to heating elements, furnace fixtures, and machined resistor parts.
Available in polished, hot-rolled, and custom cut bars with diameters ranging commonly from 6mm up to 120mm, NiCr 40:20 is stocked and supplied globally. Certified mill test reports and batch traceability provide assurance for demanding compliance requirements in pharmaceutical and power plant sectors. Hardware suppliers and OEMs value its weldability and formability across intricate fabrication applications.
Compared to NiCr 70:30 and 80:20 alloys, NiCr 40:20 trades some element life and top service temperature for a materially lower nickel content, making it the choice where duty cycles are moderate and cost per element matters as much as peak temperature.
High-quality NiCr 40:20 Round Bars ready for industrial use.
Specification Overview
| Grade | NiCr 40:20 (ASTM B344, DIN 2.4868) |
|---|---|
| Standards | ASTM B344, DIN 2.4868, ISO |
| Diameter Range | 6mm–120mm typical |
| Finish | Hot-rolled, polished, custom cut |
| Delivery | Full MTC, export packaging, batch traceability |
Equivalent Grades & Standards
| Property | Value |
|---|---|
| UNS number | — |
| Werkstoff / EN number | — |
| Density | 7.95 g/cm3 |
Identifiers and physical constants for Nichrome 40/20. A dash means no such designation is published for this grade.
Stock & Product Availability
NiCr 40:20 Round Bars are stocked in major industrial centers, supporting fast delivery for high-critical chemical, marine, pharma, and energy repair and manufacturing needs.
Chemical Composition
| Element | Min (%) | Max (%) |
|---|---|---|
| Nickel (Ni) | 37.0 | — |
| Manganese (Mn) | — | 1.0 |
| Iron (Fe) | — | Balance |
| Silicon (Si) | 1.8 | 3.0 |
| Chromium (Cr) | 18 | 22 |
| Carbon (C) | — | 0.10 |
| Aluminium (Al) | — | 0.30 |
| Copper (Cu) | — | 0.50 |
Composition limits for Nichrome 40/20. These are specification limits for the grade, not measured values for a lot; the mill test certificate supplied with your order states the actual analysis.
Mechanical & Physical Properties
| Property | Typical Value |
|---|---|
| Tensile Strength (MPa) | 320–380 |
| Yield Strength (MPa) | 140–170 |
| Elongation (%) | 28–32 |
| Max Service Temp (°C) | 900 |
Applications & Benefits
- Chemical: process heaters, vaporizer rods, furnace fixtures
- Marine: incinerator element supports, hot-gas duct hardware
- Oil & Gas: heater-treater elements, thermal process supports
- Pharma: sterilizer and oven elements, temperature control grids
- Power: cartridge heater cores, resistor banks, hot-zone hardware
- Hardware & Fabrication: element terminals, machined furnace spares, urgent OEM parts
FAQ & Search Trends
Global Export Destinations
We ship worldwide from Mumbai. See every destination we export to on our export markets page.
Domestic Supply Network Across India
We deliver across India from our Mumbai stockyard. See every city we supply on our supply locations page.
Conclusion
NiCr 40:20 Round Bars combine dependable high-temperature performance with mechanical durability for chemical, marine, oil & gas, pharma, and power generation applications. Are your critical assets protected with certified, proven nickel-chromium resistance alloy bars?