NS3202

Molybdenum-nickel alloy is an alloy composed of metal molybdenum as the matrix element and metal element nickel, which is one of many metal alloys, which is mainly used under the condition of reducing medium corrosion, and is the best alloy for hydrochloric acid corrosion, but in the presence of oxygen and oxidant, the corrosion resistance will be significantly reduced.

NS3202Chemical composition：

	Ni	Mo	C	Si	Mn	Cr	Fe
Min	Bal	26	≤
Max		30	0.02	0.1	1	1	2

NS3202Physical properties：

Density	Resistivity/μΩ ·m			Coefficient of expansion /10-6m·(m·K)-1			Thermal conductivity /W·(m·K)-1			Specific heat capacity /10-6m²/s			Elastic modulus/MPa
20℃	0℃	100℃	300℃	20~ 93℃	20~ 204℃	20~ 316℃	0℃	100℃	300℃	0℃	100℃	300℃	room temperature	316℃	538℃
9.217	1.37	1.38	1.39	10.3	10.8	11.2	11.1	12.2	14.6	3.2	3.4	3.8	217000	202000	189000

NS3202Mechanical properties：

Variety	Check the status	Temperature/℃	ob/MPa	σp0.2/MPa	δ/%	Hardness
Medium and thick plates are 9.1~51mm	1066℃Quench after heating	room temperature 204 316 427	902 871 840 823	407 361 336 319	61 60 60 61	94HB   —
The middle plate is 6.4mm	After manual TIG welding Semi-automatic after TIG welding Manual TIG welding +1066°C Solid solution Semi-automatic TIG welding +1066°C Solid solution	room temperature room temperature room temperature room temperature	855 821 817 796	一 一 一	一一一一	一一一一
The middle plate is 12.7mm	After manual TIG welding	room temperature	897

NS3202Alloy properties：

The main differences between this alloy and HuaNickel NS3202 alloy are the low carbon and silicon content (C≤ 0.02%, Si ≤0.10%) in the chemical composition, and the iron content from less than 6% to less than 2%. Due to the change of carbon, silicon and iron content, although the matrix structure ofNS3202 alloy is no different from NS3202 alloy, the precipitated phase on the alloy matrix or along the grain boundary is very different. The most obvious feature is that the intermetallic phase and carbide precipitation phase of 00Mo28Ni68Fe2 alloy are significantly reduced. The corrosion resistance of 00Mo28Ni68Fe2 alloy (including comprehensive corrosion resistance and intergranular corrosion resistance) is significantly improved.

NS3202Uses of alloys：

NS3202 alloy can be used to produce plates, pipes (welded pipes), rods, wires, strips and forgings. It is mainly used for pipelines, vessels and their linings, reaction towers and linings, pumps and valves that are resistant to hydrochloric acid, sulfuric acid, phosphoric acid and formic acid. For conditions that require welding, it is better to chooseNS3202 instead of NS3202 alloy.

NS3202Process performance：

Welding process:NS3202 alloy has good welding performance, and because the carbon, silicon and iron content in this alloy are low, the intergranular corrosion resistance and knife edge corrosion resistance after welding are better than NS3202. When the amount of iron and chromium in the alloy is appropriately controlled, the plasticity, toughness, corrosion resistance and weldability ofNS3202 alloy will be further improved. As a result,HuaNickel NS3202 does not need to be heated. This alloy is more suitable thanNS3202 alloy for the manufacture of welding equipment and components.

Heat treatment: This alloy needs to be treated with 1066°CSolid solution except for special uses. Except for those whose Fe+ Cr content in the alloy is controlled, it is generally not allowed to stay and use it for a long time between 538~816 °C.

Relevant standards：

ASTMB333 /SB333、 ASTMB622/ SB622、 ASTMB616、 ASTMB626 、 ASTMSB619、 ASTMSB626

B335 /SB335、 B564/ SB564