00Cr29Mo4TiNb

HuaNickel 00Cr29Mo4TiNb is the earliest super ferritic stainless steel, which solves the serious corrosion damage problems of commonly used chromium-nickel austenitic stainless steel in Cl-containing water medium (including seawater) such as pitting, crevice corrosion and stress corrosion. The steel has long been used in media environments such as power plants, seawater condensers and desalination plants, and can replace super austenitic stainless steels, titanium alloys and copper alloys.

00Cr29Mo4TiNbChemical composition：

	C	Si	Mn	Cr	Ni	Mo	S	P	N	Ti+Nb	Co
Min	–	–	–	–	–	–	–	–	–	–	–
Max	0.02	0.4	0.5	29	0.3	4	0.01	0.03	0.0.2	0.5	0.03

00Cr29Mo4TiNb Physical properties：

Elastic modulus/GPa	Thermal conductivity /W·(m·℃)-	Coefficient of thermal expansion/10~6·℃-1	Density/g·cm-3
200	17	17.2	7.67

00Cr29Mo4TiNbMechanical properties：

Material grade	Mechanical properties
	σb/MPa	σp0.2/MPa	δ/%
00Cr29Mo4TiNb	655	552	20

00Cr29Mo4TiNbAlloy properties：

Due to the high amount of chromium and molybdenum in HuaNickel 00Cr29Mo4TiNb, there will be σ phases, nitride and carbide phase precipitation during medium temperature aging (such as welding, thermal working and hot forming, etc.), which will lead to the reduction of plasticity, toughness and corrosion resistance of this steel, so measures need to be taken to prevent it in the production and welding process of this steel.

00Cr29Mo4TiNbUses of alloys：

It is mainly used in seawater condensers in power plants, and has achieved good long-term use results.

00Cr29Mo4TiNbProcess performance：

Welding process:HuaNickel 00Cr29Mo4TiNb has good weldability, and this steel can produce welded pipes. In the manufacturing process of heat exchange equipment, such as seawater condenser, there is no difficulty in welding 00Cr29Mo4TiNb steel pipe to tube sheet.

Heat treatment: The heat treatment process of this steel is 950~1100 °C heating, heat preservation and fast cooling.

Relevant standards：

ASTM A240/A240M-2020