Forms
Alloy C-4 Applications
Typical applications for Alloy C-4 are:
Alloy C-4 is used in a field of chemical process technology, including at higher temperatures.
Special applications are:
- Pickling bath regeneration in production companies.
- Components in acetic acid production and for the production of chemical fertilizers and pesticides.
Alloy C-4 is an austenitic nickel-molybdenum-chromium alloy with a low carbon, silicon, and iron content.
This alloy has a significantly lower tendency to form precipitation in the temperature range between 650 and 1,040 °C
(1,202 – 1,904 °F), improving its resistance to inter-crystalline corrosion. When machined perfectly, no knife line attack
occurs in the heat-affected zones of a welding edge.
Alloy C-4 is characterized by:
- Very good resistance in a broad field of corrosive media, in particular under strongly oxidizing conditions.
- Excellent resistance to pitting, crevice and stress corrosion.
- Approval for pressure vessels in the temperature range from -196 to 400 °C (-320 to 752 °F) in acc. w. VdTÜV
Materials Sheet 424.
Alloy C-4 Plate Standards
| Sheet, Plate | B 575 | SB 575 | 17744 17751 |
424 |
| Strip | - | - | - | - |
| Rod, Bar | - | - | - | - |
| Wire | - | - | - | - |
Alloy C-4 Designations
| EN | 2.4610 NiMo16Cr16T |
| ISO | NiMo16Cr16Ti |
| UNS | N06455 |
Alloy C-4 Chemical Composition
| Min | 14.50 | 14.00 | Balance | - | - | - | - | - | - | - | - |
| Max | 17.50 | 17.00 | Balance | 3.00 | 0.009 | 0.010 | 1.00 | 0.050 | 0.70 | 0.020 | 2.00 |
Alloy C-4 Physical Properties
| 8.6 g/cm3 at 20 ℃ (537 lb/ft3) at 68 ℉ | 1,290 - 1,350 ℃(2,354 - 2,462 ℉) |
| Specific Heat | 406/0.097 | 448/0.107 | 477/0.114 | 512/0.122 | 522/0.125 |
| Thermal Conductivity | -/- | 13.2/91.5 | 16.7/116 | 22.5/156 | 24.8/172 |
| Electrical Resistivity | - | 91.5 | 128 | 135 | 138 |
| Modulus Of Elasticity | -/- | 202/29.3 | 188/27.3 | 168/24.4 | 158/22.9 |
| Co-efficient of Thermal Expansion | -/- | 11.9/6.61 | 12.9/7.17 | 14.0/7.78 | 14.5/8.06 |
Alloy C-4 Mechanical Properties
| Yield Strength MPa/ksi |
300/43.5 | 245/35.5 | 220/31.9 | 205/29.7 |
| Tensile Strength MPa/ksi |
700-900/102-131 | -/- | -/- | -/- |
| Elongation % |
40 | - | - | - |
Welding Alloy C-4
When welding nickel alloys and special stainless steels, the following information should be taken into account:
The generally applicable safety recommendations, especially for avoiding dust and smoke exposure must be observed.
A workplace arranged separately must be provided that is specifically cordoned off from areas where C steel is being
processed. Maximum cleanliness is required, and drafts should be avoided during gas-shielded welding.
Welding Filler
| The use of the following fillers is recommended for gas-shielded welding methods: | TIG/MIG |
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