NS315

HuaNickel NS315 alloy is actually an improved alloy with increased chromium content on the basis of 0Cr15Ni75Fe (Inconel 600) alloy. It is widely used in the evaporator of pressurized water reactor nuclear power plants and has begun to be applied to some components of reactor internals.

NS315Chemical composition：

	Ni	C	Cr	Fe	Si	Mn	S	P	Cu	Co	B
Min	≥	0.01	27	7	≤
Max	58	0.03	31	11	0.5	0.5	0.015	0.015	0.5	0.1	0.003

Projects	trialTemperature/℃	performance	Projects	trialTemperature/℃	performance
Density/g · cm³	room temperature	8.19	Thermal conductivity /W·(m·℃)-1	100 300 500	13.5 17.3 21.0
Melting point/℃		1343～1377
Specific heat capacity/J·(kg·℃)-1	room temperature	450
Resistivity/μΩ ·m-1	room temperature 300 400	1.148 1.199 1.219	Coefficient of expansion /μm·(m·℃)-	24～100 24~300 24～500 24～700	14.06 14.53 15.19 16.18
Thermal conductivity/W·(m·℃)-1	25

NS315Physical properties：

NS315Mechanical properties：

status	σb/MPa	σp0.2/MPa	room temperatureImpact performance		δ/%
			CVN/J	/J
Solid solution	714	283	190	189	48
Solid solution+566℃×12000haging	727	334	164	164	44
Solid solution+593℃×13248haging	727	314	170	169	44
Solid solution+649℃×12000haging	748	318	172	172	41
Solid solution+760℃×12000haging	714	321	184	184	46

NS315Alloy properties：

The solid state of this alloy is pure austenite structure. Due to the low solubility of carbon in this alloy (Figure 3-3-56). Therefore, there are often carbides such as Mz₃C₆, especially in the sensitized state (or after welding), and there will be a large amount of carbide precipitation, and sometimes carbonitrides. When titanium is present in the alloy, titanium nitride is also present. Due to the stable structure of this alloy, even after long-term heating at medium temperature for more than 12000h, there is no σ brittle phase precipitation.

 

NS315Uses of alloys：

It is used in the manufacture of penetrating parts of pressurized water reactor pressure vessels and parts of control rod drive mechanisms.

NS315Process performance：

Welding performance: The welding performance of HuaNickel NS315 alloy is good. It can be used with 1Cr15Ni65Mn7Nb2 electrode and 1Cr20Ni67Mn3Nb2 wire for gas shielded welding.

Heat treatment: If used in the Solid solution treatment state, the heat treatment process of 00Cr30Ni60Fe1O alloy is 1000~1100 °C and then fast cooling.

Relevant standards：

GB/T14992 、GJB5512.2  、SGDZ  38G