Sinoxx

SINOXX combines a wide range of stainless steel products.

The group comprises:

• Austenitic stainless steels
• Duplex and super duplex stainless steels
• Ferritic stainless steels
• Martensitic stainless steels
• Precipitation hardened stainless steels

The diverse applicability of the SINOXX steels depends on their chemical composition. A single steel product cannot meet all operational requirements. Thus, under the SINOXX brand, various steels have been developed, each with some selected properties emphasized. Product durability and usability thus depends on the selection of an appropriate grade of steel. 

Get more detailed information about SINOXX grades on SIJ STEEL SELECTOR

SIJ steel selector also available as a MOBILE APP

Austenitic stainless steels

are the most common. They are non-magnetic. In addition to 18 % of chromium, they also contain a minimum of 8 % of nickel which increases their corrosion resistance. The latter is markedly improved by alloying with molybdenum, thus forming a stable protective passivation oxide layer to provide additional protection. These steels are also characterised by excellent toughness and the maintenance of mechanical properties at very low temperatures.

Duplex and super duplex stainless steels

have a typical austenitic-ferritic microstructure in the ratio of 50:50 (commercial grade). The chromium content is approximately 22 %, and the nickel content amounts to 5 %. These steels are additionally alloyed with molybdenum and nitrogen. They are characterised by very good mechanical properties, particularly yield strength and tensile strength. These steels are partly magnetic and resistant to pitting and stress corrosion cracking.

Ferritic stainless steels

are magnetic with low carbon content. The main alloying element is chromium (between 13 % and 17 %); nickel is not added. Their main advantage is resistance to stress corrosion cracking and atmospheric corrosion. Their advantage is a relatively low price, while special steps must be taken into consideration prior to, during and after fusion welding.

Martensitic stainless steels

have a ferritic structure in annealed condition, and a martensitic structure in quenched and tempered condition. Compared to conventional martensitic steel grades, they have improved corrosion resistance. These steels contain between 12 and 15 % of chromium and between 0.1 and 0.5 % of carbon. By adding molybdenum, their corrosion and wear resistance is increased. Steels containing between 0.1 and 0.25 % of carbon are mostly used in constructions which require corrosion resistance and enhanced mechanical properties. Steel grades with 0.3 % of carbon or more are used for cutting tools due to their high hardness and wear resistance.

Precipitation-hardened stainless steels

are iron-chromium-nickel alloys characterised by high strength which is obtained by precipitation hardening of the austenitic or martensitic structure. This enables alloying with one or more alloying elements, such as copper, aluminium, titanium, niobium and molybdenum.

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