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Nickel Alloy 400 in Sheet, Plate, Bar

SPECIFICATIONS: GRADE Alloy 400 | UNS N04400 | ASTM/ASME B127 / B164 | Werkstoff 2.4360

We are a stockist of alloy 400 that can be profiled and supplied in sheet, plate, and bar form meeting quality standards and requirements for many markets.

Properties

Alloy 400 (UNS N04400) is a single-phase solid-solution nickel-copper alloy with excellent corrosion resistance to a wide range of media.

This alloy is characterised by:

  • Corrosion resistance in a wide range of marine and chemical environments
  • Freedom from chloride induced stress-corrosion cracking
  • Good mechanical properties from sub-zero temperatures up to about 550°C (1020°F)
  • Approval for pressure vessels with wall temperatures from -10-425°C (14-800°F) according to VdTÜV-Wbl.263 and up to 900°F (480°C) according to ASME boiler and pressure vessel code
  • Good workability and weldability

MORE INFO

Chemical Composition (average %)

Alloy 400 Ni Fe C Mn Si Cu Al S
Min 63.0 1.0 - - - 28.0 - -
Max - 2.5 0.15 1.25 0.5 34.0 0.5 0.02

Metallurgical Structure

Alloy 400 has a face-centred cubic structure.

Corrosion Resistance

Alloy 400 has outstanding resistance to neutral and alkaline salts. It has been a standard material for salt plants for many years. This alloy is one of the few metallic materials which can be used in contact with fluorine, hydrofluoric acid, hydrogen fluoride or their derivatives. Alloy 400 shows very high resistance to caustic alkalies. Behaviour in seawater is also excellent, with improved resistance to cavitation corrosion compared with copper-base alloys. It can be used in contact with dilute solutions of mineral acids such as sulphuric and hydrochloric acids, particularly if they are air-free. However , as the alloy contains no chromium, corrosion rates may be increased significantly in oxidising conditions. Whilst alloy 400 can be considered immune to chloride-ion stress cracking, it can stress crack in the presence of mercury or in most aerated HF vapours. A stress relieving heat treatment is applied in such cases.

DESIGNATION AND STANDARDS

Country
National
Standards
Material
Designation
Specification
Chem.
Compo-
sition
Tube & Pipe Sheet
&
Plate
Rod
&
Bar
Strip Wire Forgings
Seamless Welded
France AFNOR NU30
Germany
DIN
VdTÜV2)
W.-Nr .2.4360
NiCu30Fe
17743
263
17751
263
17750
263
17752
263
17750 17753 17754
263
United
Kingdom
BS
NA13 3074 3072 3076 3073 3075
USA
ASTM
ASME
ASME
Code Case
QQ-N-281
UNS N04400 Table 1 B163/
165
SB163/
165
4574
B127
SB127
4544
Form
4,6
B164
SB164
4675
Form
1
B127
SB127
Form
5
Form
7
B564
SB564
4675
Form
2
ISO NiCu30 9722 6207 6208 9723 6208 9724 9725

MECHANICAL PROPERTIES


The following properties are applicable to alloy 400 in the stated conditions and specifications. Specified properties of material outside these ranges are subject to special enquiry.

Condition Specification Tensile Strength 0.2% Yield Strength 1.0% Yield Strength Elong A5% Brinell Hardness HB
N/mm2 Ksi N/mm2 Ksi N/mm2 Ksi
Annealed DIN, VdTÜV – Wbl. 450 65 180 26 210 30 35 ≤ 150
ASTM, ASME, QQ-N, BS 480 70 195 28 220* 35 -
Stress Relieved DIN 550 80 300 44 25 -170
VdTÜV-Wbl. 580 84 400 58 18 -
ASTM, ASME, BS 550 – 600 80 – 87 275 – 415 40 – 60 20 -
Hard DIN 700 102 650 94 3 -210
ASTM, ASME, QQ-N 690 – 760 100 – 110 620 90 2 -

Minimum mechanical properties at room temperature.
*BS only
Please Note: The figures quoted are intended for guidance only. For further information, please refer to the standards listed or contact our sales or QA department.

APPLICATIONS

Typical applications include:

  • Feed-water and steam generator tubing in power plants
  • Brine heaters and evaporator bodies in salt plants
  • Sulphuric and hydrofluoric acid alkylation plants
  • Industrial heat exchangers
  • Cladding for crude oil distillation columns
  • Splash-zone sheathing in offshore structures
  • Propeller and pump shafts for seawater service
  • Plants for uranium refining and isotope separation in the production of nuclear fuel pumps and valves used in the manufacture of chlorinated hydrocarbons
  • Monoethanolamine (MEA) reboiler tubes