ERNiCrMo-3 (SNi6625)

625 alloy exhibits excellent corrosion resistance, demonstrating superior resistance to pitting, crevice corrosion, intergranular corrosion, and erosion in chloride media. It possesses good resistance to inorganic acid corrosion, such as nitric acid, phosphoric acid, sulfuric acid, and hydrochloric acid, and also exhibits resistance to alkali and organic acid corrosion in both oxidizing and reducing environments. It effectively resists chloride ion-induced stress corrosion cracking. It shows negligible corrosion in seawater and industrial gas environments, and demonstrates high corrosion resistance to seawater and salt solutions, even at high temperatures. It is insensitive to welding processes. It resists carburization and oxidation in both static and cyclic environments, and is resistant to corrosion from chlorine-containing gases.

Category：

Nickel-based alloy welding wire

Keywords：High resistance electric heating alloy | Corrosion-resistant alloy | Thermal spraying materials

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ERNiCrMo-3 (SNi6625)

Product Overview

625 alloy exhibits excellent corrosion resistance, demonstrating superior performance against pitting, crevice corrosion, intergranular corrosion, and erosion in chloride media. It offers good resistance to inorganic acids such as nitric acid, phosphoric acid, sulfuric acid, and hydrochloric acid. It also resists alkali and organic acid corrosion in both oxidizing and reducing environments. It effectively resists chloride ion reduction stress corrosion cracking. It shows minimal corrosion in seawater and industrial gas environments, exhibiting high corrosion resistance to seawater and salt solutions, even at high temperatures. It is insensitive during welding. It resists carburization and oxidation in both static and cyclic environments and is resistant to chlorine-containing gas corrosion.

Execution Standards: GBT15620-2008 AWS 5.14

Corrosion Resistance

It demonstrates superior performance against pitting, crevice corrosion, intergranular corrosion, and erosion in chloride media.

Inorganic Acid Corrosion Resistance

It offers good resistance to inorganic acids such as nitric acid, phosphoric acid, sulfuric acid, and hydrochloric acid. It also resists alkali and organic acid corrosion in both oxidizing and reducing environments.

Effective Resistance to Chloride Ion Reduction

It also resists alkali and organic acid corrosion in both oxidizing and reducing environments. It effectively resists chloride ion reduction stress corrosion cracking.

Resistance to Carburization and Oxidation

It is insensitive during welding. It resists carburization and oxidation in both static and cyclic environments and is resistant to chlorine-containing gas corrosion.

Application Areas

1. Components for organic chemical processes involving chlorides, especially those using acidic chloride catalysts
2. Digesters and bleach tanks in the pulp and paper industry
3. Absorption towers, reheaters, flue gas inlet dampers, fans (wet), agitators, baffles, and ducts in flue gas desulfurization systems
4. Manufacturing equipment and components for use in acidic gas environments
5. Acetic acid and acetic anhydride reactors
6. Sulfuric acid condensers

Chemical Composition

Alloy	%	C	Mn	Si	Fe	Cu	Ni	Cr	Mo	Nb	Al	Ti
SNi6625	Minimum						58	20	8.0	3.0
SNi6625	Maximum	0.1	0.5	0.5	1.0	0.5		23	10	4.2	0.4	0.4

Physical and Mechanical Properties

Density	Melting Point Range (°C)	Tensile Strength (Mpa)	Average Linear Expansion Coefficient (25°C-100°C)	Young's Modulus (GPa)
8.44 g/cm³	1290°C-1350 °C	1060	12.8	205

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