00Cr27Ni7Mo5N

HuaNickel 00Cr27Ni7Mo5Nis an extra super duplex stainless steel. Super duplex stainless steel was introduced after 2000 to solve the shortcomings of local corrosion performance and strength of heat chloride resistance of super duplex stainless steel. The RE value of HuaNickel 00Cr27Ni7Mo5Ncan be as high as 49, and the high nitrogen, molybdenum, chromium content and duplex structure make the yield strength and tensile strength of this steel pipe as high as 800MPa and 1000MPa respectively, and the plastic and toughness are also maintained at a high level required for engineering applications.

00Cr27Ni7Mo5NChemical composition：

	Cr	Ni	Mo	N	C	Mn	Si	S	P
Min	26	5.5	4	0.3	≤
Max	29	9.5	5	0.5	0.03	1.5	1	0.02	0.035

00Cr27Ni7Mo5NPhysical properties：

Density

7.8g/cm³

00Cr27Ni7Mo5NMechanical properties：

Heat treatment	Tensile strengthσb/MPa	Yield point  δ₅/%	Elongation after break %	Hardness HBW
anneal	≥9.5	≥5	≥0.5	≤318

00Cr27Ni7Mo5NAlloy properties：

The structural characteristics of 00Cr27Ni7Mo5Nsteel are not significantly different from those of super duplex stainless steels such as 2507.

00Cr27Ni7Mo5N Uses of alloys：

00Cr27Ni7Mo5Nsteel has excellent resistance to pitting, crevice corrosion and stress corrosion in chloride environments, and is especially suitable for the manufacture of heat exchanger equipment with seawater and Cl- as the working medium and cooling medium. For example, in the atmospheric distillation unit of the refinery, the overhead heat exchanger tube bundle has been replaced by 00Cr27Ni7Mo5Nand the seawater condenser cooling pipe made by HuaNickel 00Cr27Ni7Mo5Nhas achieved satisfactory results.

00Cr27Ni7Mo5NProcess performance：

Welding process: 00Cr27Ni7Mo5Nhas good weldability, and 00Cr27Ni7Mo5Nis mostly used for heat transfer tubes of heat exchangers. The welding of this steel pipe to the tube sheet is recommended to be welded by TIG/GTAW (tungsten inert gas/tungsten inert gas arc welding), and manual welding and TIG automatic welding can also be used

Relevant standards：ASTM A511/A511M-2020、ASTM A789、A79