This nickel-copper chemistry features a high intensity single-phase solid solution metallurgical structure. Alloy 400 has greater corrosion resistance than nickel under reducing conditions and is more resistant than copper under oxidizing conditions. This grade has been widely used in applications requiring strong resistance to corrosive environments featuring acids, alkalies and high temperature steam. It is all but immune to the stress corrosion cracking (SCC) induced by chlorides and most freshwater conditions. A very tough material (as measured by impact testing) Alloy 400 has excellent mechanical properties in sub-zero conditions. It does not undergo a ductile-to-brittle transformation even when cooled to the temperature of liquid hydrogen. On the opposite side of the temperature range, Alloy 400 performs well in temperatures up to 1000° F.
Product Specifications
ASTM B163 /ASME SB163,ASTM B165, NACE MR0175
| ALLOY 400 (UNS NO4400) CHEMICAL COMPOSITION % (MAX.) | ||||||||||
| Cu Copper | Ni Nickel | C Carbon | Fe Iron | Mn Manganese | Si Silicon | S Sulfur | ||||
| 28.0 – 34.0 | 63.0 (min.) | 0.3 | 2.5 | 2.0 | 0.05 | 0.024 | ||||
| DIMENSIONAL TOLERANCES | |||
| OUTSIDE DIAMETER (OD) | OD TOLERANCE | WALL TOLERANCE | |
| 1/8”-3/16” Tubes | +.003”/-.000” | +/- 10% | |
| 1/4″-<1/2″ Tubes | +.004”/-.000” | +/- 10% | |
| 1/8″-5/8″ Tubes | +.005”/-.000” | +/- 15% | |
| 1/8″ -< 3/4″ Tubes | +.0075”/-.0075” | +/- 10% | |
| FABRICATION | |||
| Alloy 400 can be satisfactorily fabricated, welded and joined by standard methodologies and rates of production. Usually, subsequent thermal treatment to effect re-balancing of the alloy is not required. Contact PAC Stainless for detailed fabrication and welding information. | |||
| TYPICAL APPLICATIONS Equipment in Sulfuric Acid Environments, Chemical Processing – Organic/Inorganic Chlorides, Sour Gas Well Environments, Pulp & Paper Production – Digesters & Bleach Plants, Waste Treatment – Evaporators, Pollution Control – Sulfur Compounds in Flue Gas | |||
| SIZE RANGE | |
| Outside Diameter (OD) | Wall Thickness |
| 1/8” – 3/4” | .035″ – .065″ |
| Cold Finished and Bright Annealed Tube | |
| MECHANICAL PROPERTIES | |
| YIELD STRENGTH 0.2% OFFSET | 28 KSI min. |
| TENSILE STRENGTH | 70 KSI min. |
| ELONGATION (MINIMUM 2 INCHES) | 35% |
Alloy 400 Tubing (Printable PDF document)