NS411

HuaNickel NS411 is a precipitation-hardening nickel-based corrosion-resistant alloy developed in China in the 60s of the 20th century on the basis of increasing the chromium content of foreign 1Cr15Ni70Ti3AlNb (Inconel X-750). The main performance characteristics are good corrosion resistance and wear resistance in oxidizing media.

NS411Chemical composition：

	Fe	Cr	AI	Ti	Nb	Mn	Si	C	S	P
Min	Bal	19	1	2.25	0.7	≤
Max		2	10.4	2.75	1.2	1	0.5	0.1	0.01	0.02

NS411Physical properties：

Densityg/cm³	Melting point/℃	Elastic modulus /MPa	Thermal conductivity/W·(m·℃)-1			Linear expansion coefficient/μm·(m·℃)-1
			48℃	316℃	427℃	100℃	200℃	300℃
8.3	1395～1425	23324	10.1	15.6	17.4	13.1	13.4	13.9

NS411Mechanical properties：

Smelting method	Heat treatment process	σb/MPa	σp0.2/MPa	δ/%	ψ/%	Hardness	Qk/kg·m·cm-2
Vacuum + electroslag Vacuum + electroslag Vacuum smelting	1080~1100℃ 40minWater 970℃anneal 1080℃Solid solution +750℃,8h 十620℃,8h	759.0～792.1 994.7～1127.0 1244.6～1245.0	377.9～470.4 543.9～696.2	50～62 27～35 29.7～33.2	62～68 44.5～54 45.9～47.0	HB 170～197   HRC 39	≥37.5     ≥11.4

NS411Alloy properties：

The corrosion resistance of HuaNickel NS411 alloy in oxidizing and reducing media is similar to that of 0Cr15Ni75Fe alloy. Due to the high chromium content, the alloy is more resistant to oxidizing acids, such as nitric acid, than alloys with low chromium content. Due to the high chromium content and aluminium content, the alloy also has good oxidation resistance at high temperatures. NS411 has a high hardness in the aging state, so this alloy is particularly suitable for use under conditions that have both corrosion and collision and wear.

NS411Uses of alloys：

NS411 alloy is mainly used in China for corrosion-resistant conditions, such as the manufacture of metering pump globe valves with dilute nitric acid corrosion and vibration and impact conditions.

NS411Process performance：

Heat treatment: According to different use requirements, NS411 alloy can be treated with Solid solution, anneal, Solid solution + single aging and Solid solution + double aging.

Welding process: Welding is usually employed

Welding process: argon arc welding (TIG, MIG), plasma welding, electron beam welding and other methods are used for welding without special difficulties, but the alloy must be treated with Solid solution before welding.

Relevant standards：

GB /T 15007-2017