NS331

HuaNickel NS331 is a “pure nickel-chromium-molybdenum alloy” with the highest chromium content and total Cr+Mo content, the lowest iron content and no tungsten, copper, titanium and other elements in the nickel-chromium-molybdenum (tungsten) alloy series. It is precisely because of the reasonable ratio of chemical composition of this alloy that this alloy is currently a corrosion-resistant alloy with the best comprehensive corrosion resistance and the highest microthermal stability.

NS331Chemical composition：

	Ni	Cr	Mo	AI	C	Si	Mn	P	S	Fe
Min	Bal	22	15	0.1	≤
Max		24	16.5	0.4	0.01	0.1	0.5	0.04	0.02	1.5

NS331Physical properties：

Temperature/℃	Specific heat capacity/J·(kg·K)-I	Thermalconductivity/W·(m·K)-1	Resistivity/μΩ ·m	Elastic modulus/GPa	Linear expansion coefficient/×10-6·K-1
20 93 100 200 204 300 316 400 427 500 538 600	414   425 434   443   451 459   464	10.4 —- 12.1 13.7   15.4   17.0   18.6 20.4	126   127 129 131   133 134   133	210 206 207 200 199 196 194 190 188 185 181 178	11.9 12.2   12.5 -— 12.7 — 12.9 13.1

NS331Mechanical properties：

Type of material	Size/mm	Strength/MPa			δ/%	akv/J ·cm
		Gb	01.0	60.2		room temperature	-196℃
Thin plate, cold-rolled medium plate, hot-rolledRods	0.5～6.4	≥690	≥380	≥340	≥40	—	一
	5.0～30	≥690	≥380	≥340	≥40	≥225	≥200
	≤100	≥690	≥380	≥340	≥40	≥225	≥200

NS331Uses of alloys：

HuaNickel NS331 alloy has a wider range of applications, especially in other media that Ni-Cr-Mo(W) alloys cannot be used, such as pressure vessels for fluorination and chlorination reactions, rotary kilns for HF production, FGD units for coal-fired power plants, acrylate/methacrylic acid reactors, snake heaters, etc. This alloy produces medium plates, sheets, seamless and welded pipes, rods, wires, strips, as well as forgings and castings.

NS331Process performance：

Welding process: This alloy can be welded by GTAW, GMAW plasma welding, MIG, TI and manual arc welding.

Relevant standards：

GB /T 15007-2017