First choice in stainless
S T A I N L E S S S T E E L
SIJ is a vertically integrated holding company, the leading steel manufacturer in Slovenia, and one of the largest stainless and special steel manufacturers in Europe. SIJ Group consists of the two largest steel companies in Slovenia (Acroni and Metal Ravne), other manufacturing and processing companies (Noi Ravne, Elektrode, SUZ), specialized service and sales centers across Europe and the USA, and companies for scrap steel collection and sales.
SIJ stainless steels are produced in compliance with the international EN, ASTM, ISO standards. We supply products with known and guaranteed origin of steel.
Our own development is based on almost 400 years of tradition in the production of special steel grades. We develop non-standard steel grades together with our customers and according to their specifications.
High quality of our products and satisfaction of our customers are two main guidelines of our company. All companies in our group are ISO 9001:2008 certificated manufacturers. Based on years of experience and extensive knowledge, SIJ companies can offer even the most demanding stainless steel products in wide variety of forms:
hot and colld rolled coils and sheets
forged and rolled bars
cold drawn / ground bars
cold drawn wire.
SIJ Group also produces welding consumables that complement the wide range of stainless steel offer.
S TA I N L E S S S T E E L
AUSTENITIC STAINLESS STEEL ( - iron)Austenitic stainless steels are characterized by good to excellent corrosion resistance combined with very good weldability and formability. Austenitic structure has good creep resistance and good oxidation resistance which make them useful at elevated temperatures. Austenitic steel can also be used in cryogenic applications and in annealed condition it is the only non-magnetic steel.
DUPLEX STAINLESS STEEL (Austenitic-ferrite)Duplex stainless steels have high strength, good toughness and very good corrosion resistance, especially toward stress corrosion cracking and corrosion fatigue. These steels have also good weldability and reasonable formability.
FERRITIC - MARTENSITIC STAINLESS STEEL ( - iron)Ferritic - martensitic stainless steels have good corrosion resistance, especially towards stress corrosion cracking. Lower carbon and nitrogen contents improve both weldability and toughness which otherwise can be limited.
Stainless steels represent a family of corrosion-resistant steels that contain at least 10,5 % of chromium. Apart from chromium, these steels are alloyed with nickel, molybdenum, titanium, niobium and other elements. Their mechanical properties and application depend on their chemical composition. A careful choice of the right steel grade is affecting the durability and serviceability of a manufactured product.
Stainless steel products, produced by SIJ group companies, have been succesfully used in even the most demanding environments and applications in following industries:
oil & gas
chemical and petrochemical
pulp and paper
machinery and equipment
N I C K E L A L L O Y S
Nickel and nickel alloys are the most important materials for the process industry because of their excellent corrosion resistance in very aggressive corrosion environments, where high temperatures and stresses are present. Similar as stainless steels, nickel alloys are covering a wide range of corrosion resistance. Due to better solubility of different alloying elements in nickel (chromium, molybdenum, tungsten,..), compared to iron, nickel alloys can be used even in more aggressive environments as stainless steels.
We also produce Nickel Alloy quarto plates Alloy 825, an austenitic nickel-iron-chromium alloy with additions of molybdenum,
copper and titanium (2.4858, UNS N08825). The alloy is designed to provide exceptional resistance to many corrosive environments. It is resistant to chloride-ion stress-corrosion cracking, reducing environments such as those containing sulfuric and phosphoric acids, to pitting and crevice corrosion and to a variety of oxidizing substances such as nitric acid, nitrates and oxidizing salt. The titanium addition serves, with an appropriate heat treatment, to stabilize the alloy against sensitization to intergranular corrosion.
Alloy 800 H Nickel Iron - Chromium alloy (1.4876/1.4958, UNS N08810). Alloy 800H is nickel-iron-chromium alloy that provide high strength and excellent resistance tooxidation and carburization at high temperatures. It also has good resistance to many nitriding atmospheres. High creep strength is attained through control over crystal grains via high temperature heat treatment, together with fine control over carbon, titanium, and aluminum content.
Industrial Heating Industry - radiant tubes, return bends, muffles, retorts and fixtures for heat treating furnances
Petrochemical furnace tubes
Hydrocarbon Processing Industry - catalyst tubing, convection tubing, outlet manifolds and quenching system piping
Power Generation Industry - steam super-heaters, high temperature heat exchangers, piping systems
C L A D P L A T E S
Clad or compound plate is a composite steel plate, produced by bonding two plates of different material grade. The thicker part of clad plate is called Base metal, which is usually carbon steel plate. The thinner layer is Cladding, which can be stainless steel, Nickel alloy, wear resistant or tool steel. Both plates are metallurgically bonded, therefore clad plate behaves like a single plate.
The advantages of using clad plates are numerous:
Such plate has optimal properties on both sides of the plate. It combines advantages of both material grades.
Less weight and more strength.
Clad plates can be used in a variety of industries and applications. They are used in construction, for pipelines in oil & gas industry and other piping, in earth moving and mining industry, in mechanical engineering for parts with extreme abrasion resistance properties, for pressure vessels, for ballistic protection. All our plates are produced exclusively in our own steel mill plant, therefore we can ensure stable characteristics of our products and offer short delivery terms.
Cladding material thickness: 3,2 mm
Base material thickness: 12 to 40 mm
Width: max. 2000 mm
DISSIMILAR WELDING(General applications)
B A S E M E T A L AISI 304L 1.4301 AISI 310 1.4845 AISI 316L 1.4404 AISI 321 1.4514Acroni 4835
AISI 2205 1.4462
AISI 2507 1.4410
Alloy 625 ** 2.4856
S31254 1.4547 CARBON STEELAISI/AWS W.Nr.
AISI 304L 1.4301 308L TIG19/9NCSi309L
INOXR25/14 NC308 /316L
INOXR19/9NB INOX R25/14 NC309LMo
AISI 310 1.4845 309L INOXR25/14 NC310
INOX R 20/10/3L309LMo/2209
310/625 INOX R 25/20 309L INOXR25/14NC
AISI 316L 1.4404 3016LMo INOXR25/14/3NC309L/625
INOX R 25/14NC309LMo/2209
INOX R 20/25L309LMo/625 INOX R 25/20
309L/ 309LMo INOX R 25/14/3NC
AISI 321 1.4514309L
309L INOXR25/14 NC
309L/253MA INOX R 25/14NC
625 MIG 625
Acroni 4835 1.4835 309LMo INOXR25/14 NC309L
INOXR25/14NC 309L INOXR25/14NC253MA
INOX R 20/10/3L309L/2209
S32101* 1.4162 309LMo/2209 INOX R25/14/3 NC309LMo/2209
INOX R 25/4Fe2209
INOXR22/9/3LN INOX R25/14 NC309L/309LMo
AISI 2205 1.4462 309LMo/2209 INOX R25/14/3 NC309LMo/2209
INOX R 22/9/3 LN2209
INOXR22/9/3LN INOX R25/14 NC309L/309LMo
AISI 2507 1.4410 309LMo/2209 INOX R25/14/3 NC309LMo/2209
INOX R 25/4Fe2209
INOX R 25/14NC INOX R25/14 NC309L/309LMo