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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.
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:
Alloy 400 has a face-centred cubic structure.
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.
|Tube & Pipe||Sheet
|UNS N04400||Table 1||B163/
|Condition||Speciﬁcation||Tensile Strength||0.2% Yield Strength||1.0% Yield Strength||Elong A5%||Brinell Hardness HB|
|Annealed||DIN, VdTÜV – Wbl.||450||65||180||26||210||30||35||≤ 150|
|ASTM, ASME, QQ-N, BS||480||70||195||28||220*||35||-|
|ASTM, ASME, BS||550 – 600||80 – 87||275 – 415||40 – 60||20||-|
|ASTM, ASME, QQ-N||690 – 760||100 – 110||620||90||2||-|
Minimum mechanical properties at room temperature.
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.