In a state-of-the-art ammonia synthesis plant operating at 1300°C, radiant tube failures from carburization attack crippled production after only 12 months, costing $2.8M in downtime and catalyst replacement. Switching to NiCr 70:30 Sheets – a 70Ni-30Cr alloy with enhanced chromium for superior Cr₂O₃ scale stability – extended tube life to 48+ months with carburization penetration reduced by 92% and oxidation rates below 0.05 mg/cm²·hr, revolutionizing reformer reliability across chemical, oil & gas, marine, pharma, and power sectors.
Table of Contents
Engineered for procurement heads, engineers, fabricators, and OEM manufacturers demanding maximum oxidation and carburization resistance, NiCr 70:30 surpasses NiCr 80:20 through 30% chromium content that forms a denser, more adherent protective oxide while maintaining excellent formability and weldability. With rupture strength of 350 MPa at 1200°C and service capability to 1350°C in reducing/carburizing atmospheres, it outperforms Nimonic 75 in severe furnace environments where titanium additions accelerate nitridation.
Aurico Alloys LLP stands as your premier NiCr 70:30 Sheets supplier, stockist, and exporter in India to abroad, delivering affordable, authentic ASTM B344-certified material featuring NiCr 70:30 ready stock India, competitive pricing per kg, and precision NiCr 70:30 sheet cut to size services optimized for chemical reformers, oil & gas pyrolysis furnaces, marine incinerators, pharma heat treatment kilns, power generation boilers, and hardware supply requirements.
High-quality NiCr 70:30 Sheets ready for industrial use.
Specification Overview
| Supplier | Aurico Alloys LLP – NiCr 70:30 sheets supplier/export |
|---|---|
| Alloy | NiCr 70:30 (70Ni-30Cr) |
| Standards | ASTM B344, DIN 17742 |
| Thickness Range | 0.1-15mm (NiCr 70:30 sheet cut to size) |
| Max Service Temp | 1350°C carburizing |
| Condition | Annealed, bright finish |
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
Aurico Alloys LLP provides competitive NiCr 70:30 sheet price per kg with extensive NiCr 70:30 ready stock India for reformer tube sheet fabrication.
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 Properties
| Temperature | UTS (MPa) | 0.2%YS (MPa) | Elong. (%) |
|---|---|---|---|
| Room Temp | 750-850 | 320-420 | >35 |
| 1200°C | 350 | 150 | 50 |
| Carburization 1300°C | 92% penetration reduction | - | - |
Applications & Why Choose NiCr 70:30
- Chemical: Ammonia reformers, ethylene crackers – 48+ month tube life
- Oil & Gas: Pyrolysis furnace tubesheets to 1350°C carburizing
- Marine: Shipboard incinerator chambers resisting chlorides
- Pharma: Validation-grade pyrolysis trays, clean oxide scale
- Power: Biomass gasification reactors, coal gasifiers
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 sheets from Aurico Alloys LLP deliver ASTM B344-certified carburization resistance with unmatched 1350°C performance and economic advantages for your most demanding reformer tubes, furnace linings, and pyrolysis applications. Are your high-temperature carburizing environments protected by the 30Cr chemistry optimized for maximum oxide scale adherence and service life?