X15CrNiSi20-12 – 1.4828

Wear-Resistant Austenitic Steels

X15CrNiSi20-12 – 1.4828 / SUH309 / Z17CNS20-12 / X16CrNi23-14 / 1Cr20Ni14Si2

X15CrNiSi20-12 – 1.4828 stainless steel is an austenitic heat-resistant stainless steel known for its excellent high-temperature performance. Commonly referred to as AISI 309 (SUH309), this alloy contains higher levels of chromium and nickel compared to standard stainless steels, enabling reliable operation in severe thermal environments. The addition of silicon (Si) further enhances oxidation resistance, supporting performance at elevated temperatures.

The chemical composition typically includes approximately 20–23% chromium and 11–14% nickel, along with silicon. The high chromium content forms a protective oxide layer on the surface, providing strong resistance to oxidation and high-temperature corrosion. Nickel stabilizes the austenitic structure, maintaining ductility and structural stability even at elevated temperatures. Silicon contributes to improved performance in oxidizing atmospheres.

One of the key advantages of 1.4828 stainless steel is its ability to operate for extended periods at high temperatures, maintaining structural integrity up to approximately 1000°C. This makes it particularly suitable for heat-exposed equipment and industrial furnace systems.

From a mechanical standpoint, this grade provides good strength and ductility at elevated temperatures. It is suitable for both hot and cold forming processes and offers excellent weldability, allowing it to be easily fabricated using various manufacturing techniques.

Its corrosion resistance is particularly strong in high-temperature and oxidizing environments. While in standard atmospheric conditions grades such as 304 or 316 may be more common, 1.4828 excels in heat resistance applications, where thermal stability is critical.

Overall, X15CrNiSi20-12 – 1.4828 (309 grade) stainless steel is an essential engineering material for high-temperature industrial applications, offering oxidation resistance, durability, and long service life under demanding conditions.

Main Application Areas

• Industrial furnaces and heat treatment equipment
• High-temperature boilers and burner systems
• Exhaust systems and heat-exposed components
• Chemical and petrochemical plants
• Heat exchangers and process equipment
• Equipment used in power generation plants
• High-temperature piping and duct systems
• Metallurgical and foundry equipment
• High-heat components in the automotive industry

Thanks to these properties, X15CrNiSi20-12 – 1.4828 (AISI 309) stainless steel is widely used as a reliable material for applications involving high temperatures and demanding operating conditions.

General Identity

X15CrNiSi20-12 – 1.4828

Equivalent Grades

X15CrNiSi20-12 – 1.4828

Standards

X15CrNiSi20-12 – 1.4828

Chemical Composition

X15CrNiSi20-12 – 1.4828

Mechanical Properties

X15CrNiSi20-12 – 1.4828