In a bustling Mumbai petrochemical plant, a sudden failure of furnace heating elements exposed to alternating oxidizing and reducing atmospheres halted production, costing thousands in downtime until engineers switched to NiCr 70:30 Plates. These high-chromium plates resisted green rot that plagued NiCr 80:20 alternatives, restoring operations with 20% longer life and cutting maintenance by half. Procurement heads, engineers, fabricators, OEMs, and hardware stores in chemical, oil & gas, marine, pharma, and power industries now rely on NiCr 70:30 for unmatched reliability in extreme heat.
Table of Contents:
NiCr 70:30 (UNS N06003), a nickel-chromium resistance alloy with 70% nickel and 30% chromium, delivers superior performance over standard alloys like NiCr 80:20, especially in reducing atmospheres where green rot—intergranular oxidation causing green oxide flakes—devastates lesser materials. Its higher chromium content forms a denser Cr₂O₃ protective layer, enabling continuous use up to 1250°C, ideal for heavy-duty industrial furnace heating elements and high-temperature thermal processing. Unlike NiCr 80:20, which suits pure oxidizing environments but falters in fluctuations, NiCr 70:30 extends service life by 20% in harsh cycles, reducing costs for demanding applications.
Tailored for chemical waste incinerators, petrochemical reactor internals, offshore platform immersion heaters, pharmaceutical sterilization units, and power plant load banks or braking resistors, these plates offer high electrical resistivity (1.16 Ω mm²/m), excellent ductility post-use, and weldability. NiCr 70:30 outperforms in marine grade applications for oil refinery crude heating elements and gas turbine exhaust ducts, resisting oxidation where others embrittle. As verified NiCr 70:30 plate exporters in India with MTC EN 10204 3.1 certification, suppliers ensure global compliance.
Aurico Alloys LLP stands as a trusted supplier, manufacturer, and stockist of affordable, best quality, authentic NiCr 70:30 Plates, serving chemical, oil & gas, marine, pharma, power generation industries, and hardware stores from Mumbai with custom cuts for vacuum furnace shields or kiln structural parts. NiCr 70:30 plate suppliers in Mumbai provide competitive NiCr 70:30 plate price per kg for large-scale needs, prioritizing why buy over common alternatives: proven green rot resistance and superior life in reducing atmospheres versus NiCr 80:20.
High-quality NiCr 70:30 Plates ready for industrial use.
Specification Overview
| Supplier & Manufacturer | Aurico Alloys LLP |
|---|---|
| Grade | NiCr 70:30 (UNS N06003, 2.4658) |
| Standards | DIN 17470, ISO 9723, ASTM equivalents |
| Thickness Range | 0.5mm – 50mm |
| Width | 1000mm – 2500mm |
| Finish | Hot rolled, annealed, custom cut, oxidized |
| Delivery | Stock, MTC EN 10204 3.1, export packed |
Equivalent Grades & Standards
| Property | Value |
|---|---|
| UNS number | N06003 |
| Werkstoff / EN number | 2.4658 |
| EN designation | NiCr 70 30 |
| Density | 8.1 g/cm3 |
| Melting range | 1400 °C |
| Electrical resistivity (20 °C - per DIN 17470) | 119 µΩ·cm |
| Electrical resistivity (20 °C - per ASTM B 344) | 116 µΩ·cm |
| Thermal conductivity | 13.8 W/m·K |
| Specific heat (20 °C) | 420 J/kg·K |
| Coefficient of expansion (200 °C) | 13.5 µm/m·°C |
| Modulus of elasticity | 200 kN/mm² |
| Maximum operating temperature in air | 1250 °C (sheet prints this as approximate) |
| Plate, sheet and strip specification | ASTM B344 |
Identifiers and physical constants for Nichrome 70/30. A dash means no such designation is published for this grade.
Stock & Product Availability
NiCr 70:30 plates stocked by Aurico Alloys LLP as corrosion resistant Alloy 70/30 plate stockist in Mumbai: thicknesses 0.5–50mm, widths up to 2500mm, ready for high-resistivity needs in power plant load banks, braking resistors, and custom sizes for laboratory vacuum furnace shields.
Chemical Composition
| Element | Min (%) | Max (%) |
|---|---|---|
| Iron (Fe) | — | 1 |
| Chromium (Cr) | 29 | 31 |
| Nickel (Ni) | — | Balance |
| Carbon (C) | — | 0.07 |
| Manganese (Mn) | — | 1.0 |
| Silicon (Si) | 1 | 1.5 |
| Copper (Cu) | — | 0.5 |
| Aluminium (Al) | — | 0.2 |
| Others | 0.01 | 0.04 |
Composition limits for Nichrome 70/30. 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 |
|---|---|
| Electrical Resistivity (Ω mm²/m) | 1.16 |
| Max Service Temp (°C) | 1250 |
| Tensile Strength (MPa) | 725–820 |
| Yield Strength 0.2% (MPa) | ≥300 |
| Elongation (%) | ≥25–30 |
Applications & Benefits
- NiCr 70:30 plates for chemical waste incinerators and high-heat exhaust systems: Green rot resistant in alternating atmospheres.
- Corrosion resistant Alloy 70/30 plate for petrochemical reactor internals and heat treatment baskets.
- Marine grade NiCr 70:30 plates for offshore platform high-power immersion heaters and gas turbine exhaust ducts.
- NiCr 70:30 plate exporters in Mumbai serving pharma sterilization units with durable, custom cut sheets.
- High-resistivity Alloy 70/30 plates for power plant load banks, braking resistors, and electric kiln structural parts.
- NiCr 70:30 vs NiCr 80:20: Superior life in reducing atmospheres, cost-effective at 15-20% lower nickel.
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
We deliver across India from our Mumbai stockyard. See every city we supply on our supply locations page.
Conclusion
NiCr 70:30 Plates from Aurico Alloys LLP deliver green rot resistance, high-temperature oxidation protection up to 1250°C, and cost savings over alternatives, empowering chemical, oil & gas, marine, pharma, power sectors, and hardware stores with reliable heating solutions. Are your high-heat assets protected with superior NiCr 70:30 plates?