Quarto plate

Core 304/4301

Core 304/4301 is a classic 18% chromium, 8% nickel austenitic stainless steel. It’s an all-purpose product with good corrosion resistance and is suitable for a wide variety of applications that require good formability and weldability. Core 304/4301 can be delivered with a variety of surface finishes.

Core 304/4301 is an austenitic stainless steel, which belongs to the standard CrNi stainless steel family. Core 304/4301 is the basic variant with normal carbon and nickel content.

The austenitic CrNi standard grades are the most widely used group of stainless steels. Their well-balanced material properties make them suitable for the fabrication of many products.

Core 304/4301 is commonly available from many stainless steel stockists in many product forms and dimensions. It can be supplied with a wide range of functional and aesthetic surface finishes.

Core 304L/4307

Core 304L/4307 is a low-carbon alternative to Core 304/4301. The lower carbon content minimizes carbide precipitation as a result of heat input, for example during welding, giving improved resistance against intergranular corrosion. It’s suitable for a wide variety of applications that require good formability and weldability, and can be delivered with a variety of surface finishes.

Core 304L/4307 is an austenitic stainless steel that belongs to the standard CrNi stainless steel family.

The austenitic CrNi standard grades are the most widely used group of stainless steels. Their well-balanced material properties make them suitable for the fabrication of many products.

Core 304L/4307 is commonly available from many stainless steel stockists in many product forms and dimensions. Core 304L/4307 is also available in the temper rolled condition with higher strength.

Core 304LN/4311

Core 304LN/4311 is a low-carbon, higher nickel and nitrogen alloyed alternative to Core 304/4301 with improved strength and low-temperature toughness. Suitable for applications that require high tensile strength. is an austenitic stainless steel that belongs to the standard CrNi stainless steel family.

The austenitic CrNi standard grades are the most widely used group of stainless steels. Their well-balanced material properties make them suitable for the fabrication of many products. Due to its fully austenitic structure, Core 304LN/4311 is suitable for applications with low magnetic permeability requirements (µ < 1.005).

Core 304L/4306

Core 304L/4306 is a higher nickel alternative to Core 304L/4307 with improved formability and deep drawability. Core 304L/4306 is an austenitic stainless steel that belongs to the standard CrNi stainless steel family. Core 304L/4306 has the variant with 10.5 wt.% nickel for improved formability and low carbon content for improved resistance against intergranular corrosion after welding.

The austenitic CrNi standard grades are the most widely used group of stainless steels. Their well-balanced material properties make them suitable for the fabrication of many products.

Core 304L/4306 is commonly available from many stainless steel stockists in manyproduct forms and dimensions. It can be supplied with a wide range of functional and aesthetic surface finishes.

Core 347/4550

Core 347/4550 is a niobium stabilized alternative Core 321/4541 with improved intergranular corrosion resistance and good mechanical properties at high temperatures. Core 347/4550 is particularly useful in applications with intermittent heating in the range 400–900 °C/750–1650 °F. Core 347/4550 is an austenitic stainless steel that belongs to the standard CrNi stainless steels. Core 347/4550 can be welded in all dimensions without becoming susceptible to intergranular corrosion.

The austenitic CrNi standard grades are the most widely used group of stainless steels. Their well-balanced material properties make them suitable for the fabrication of many products.

Supra 316/4401

Supra 316/4401 is an austenitic stainless steel that belongs to the standard CrNiMo stainless steels. Due to their molybdenum content, the austenitic CrNiMo standard grades can be used in applications with increased demand for corrosion resistance. Their well-balanced material properties make them suitable for the fabrication of many products. Supra 316/4401 is commonly available from many stainless steel stockists in many product forms and dimensions. It can be supplied with a wide range of functional and aesthetic surface finishes.

Supra 316L/4404

Supra 316L/4404 is our most widely used molybdenum-alloyed austenitic stainless steel. Supra 316L/4404 is a low-carbon stainless steel and is used in various process industries and other aggressive environments with higher than average corrosion resistance requirements. Due to its low carbon content, this product is also weldable in thicknesses of more than 5–6 mm/ 0.19–0.23 in without sensitivity to intergranular corrosion.

Supra 316L/4404 is an austenitic stainless steel that belongs to the standard CrNiMo stainless steels. Grade Supra 316L/4404 has low carbon content for improved resistance against intergranular corrosion after welding.

Due to their molybdenum content, the austenitic CrNiMo standard grades can be used in applications with increased demand for corrosion resistance. Their well-balanced material properties make them suitable for the fabrication of many products.

Supra 316L/4404 is commonly available from many stainless steel stockists in many product forms and dimensions. It can be supplied with a wide range of functional and aesthetic surface finishes.

Supra 316/4436

Supra 316/4436 is a Supra 316L/4432 alternative with higher carbon content and similar corrosion resistance. Supra 316/4436 is an austenitic stainless steel that belongs to the standard CrNiMo stainless steel family. Supra 316/4436 has the variant with increased molybdenum content for slightly improved corrosion resistance.

Due to their molybdenum content, the austenitic CrNiMo standard grades can be used in applications that demand increased corrosion resistance. Their well-balanced material properties make them suitable for the fabrication of many products.

Supra 316/4436 is available in many product forms and dimensions. It can be supplied with a wide range of functional and aesthetic surface finishes.

Supra 316L/4432

Supra 316L/4432 has high resistance to non-oxidizing acids and chloride-containing media due to its higher molybdenum content. Supra 316L/4432 has good formability and weldability. Supra 316L/4432 is an austenitic stainless steel that belongs to the standard CrNiMo stainless steel family. It has low carbon content for improved resistance against intergranular corrosion after welding and increased molybdenum content for slightly improved corrosion resistance.

Due to their molybdenum content, the austenitic CrNiMo standard grades can be used in applications with increased demand for corrosion resistance. Their well-balanced material properties make them suitable for the fabrication of many products.

Supra 316L/4432 is available in many product forms and dimensions. It can be supplied with a wide range of functional and aesthetic surface finishes.

Supra 316L/4435

Supra 316L/4435 is a Supra 316L/4432 alternative with higher chromium and nickel content for enhanced corrosion resistance and formability. Supra 316L/4435 is an austenitic stainless steel that belongs to the standard CrNiMo stainless steel family. Supra 316L/4435 has low carbon content for improved resistance against intergranular corrosion after welding, increased nickel content for improved formability, and increased molybdenum content for slightly improved corrosion resistance.

Due to their molybdenum content, the austenitic CrNiMo standard grades can be used in applications with increased demand for corrosion resistance. Their well-balanced material properties make them suitable for the fabrication of many products.

Supra 316L/4435 is available in many product forms and dimensions. It can be supplied with a wide range of functional and aesthetic surface finishes.

Supra 316Ti/4571

Supra 316Ti/4571 is a titanium-stabilized, molybdenum-alloyed austenitic alternative to Supra 316L/4404 – mainly used for elevated temperature applications. Due to its titanium-stabilization this product is weldable in all thickness ranges without becoming susceptible to intergranular corrosion. It belongs to the standard CrNiMo stainless steel family.

Due to their molybdenum content, the austenitic CrNiMo standard grades can be used in applications with increased demand for corrosion resistance. Their well-balanced material properties make them suitable for the fabrication of many products. Due to its titanium content, Supra 316Ti/4571 can also be used at elevated temperatures.

Supra 316Ti/4571 is commonly available from many stainless steel stockists in many product forms and dimensions. Due to its titanium alloying, polishing options for Supra 316Ti/4571 are limited.

Forta DX 2205

Forta DX 2205 is the most popular duplex product on the market. It offers very good resistance to uniform and localized corrosion and stress corrosion cracking in combination with high mechanical strength.

Forta LDX 2101®

Forta LDX 2101 is a lean-alloyed duplex product with good resistance to localized and uniform corrosion, as well as stress corrosion cracking, making it a good substitute for coated carbon steel. It also offers high mechanical strength and good machinability.

Forta DX 2304

Duplex grade with good resistance to localized corrosion and stress corrosion cracking in combination with high mechanical strength. Used in e.g. offshore topside applications since more than 20 years.

The grade is also available as Forta EDX 2304 with enhanced corrosion resistance and strength, but still within the same EN/ASTM standards as Forta DX 2304. The EDX version has a NORSOK approval from Aker Engineering & Technolgy ASaccording to NORSOKM standard M-650 Edition 4, September 2011 "Qualification of manufacturers of special materials".

Forta EDX 2304

Forta LDX 2404®

Austenitic-ferritic stainless steel also referred to as duplex stainless steels, combine many of the beneficial properties of ferritic and austenitic steels. Due to the high content of chromium and nitrogen, and often also molybdenum, these steels offer good resistance to localised and uniform corrosion. The duplex microstructure contributes to the high strength and high resistance to stress corrosion cracking. Duplex steels have good weldability. All duplex grades have the maximum service temperature restricted to 250 or 325°C according to EN10028-7 or ASME II-D 2007 respectively. Outokumpu produces a range of duplex grades, LDX 2101^®; 2304; LDX 2404^®; 2205; 4501 and 2507.

LDX 2404^®is a molybdenum-containing duplex stainless steel with high contents of chromium and nitrogen. The grade combines a higher mechanical strength than for other common duplex grades with a generally high corrosion resistance.These characteristics make

LDX 2404^® well suited for optimal designs with respect to strength, reduced maintenance, durability and long-term cost efficiency.

Forta SDX 100

Austenitic-ferritic stainless steel also referred to as duplex stainless steels, combine many of the beneficial properties of ferritic and austenitic steels. Due to the high content of chromium and nitrogen, and often also molybdenum, these steels offer good resistance to localised and uniform corrosion. The duplex microstructure contributes to the high strength and high resistance to stress corrosion racking. Duplex steels have good weldability. All duplex grades have the maximum service temperature restricted to 250 or 325°C according to EN10028-7 or ASME II-D 2007 respectively. Outokumpu produces a range of duplex grades, LDX 2101®, 2304, LDX 2404®, 2205, 4501 and 2507. The properties of 4501 is in general terms very similar to those of 2507. Grade 4501 is delivered if specified.

Forta SDX 2507

Forta SDX 2507 is a super duplex product with higher corrosion resistance and mechanical strength than Forta DX 2205. Often used in extremely corrosive environments such as desalination, chemical, or offshore subsea applications.

Ultra 904L

High Ni and Mo austenitic grade with very high resistance to corrosion. Commonly used in chemical and petrochemical industry for handling medium concentrated sulphuric acid.

Sanicro® 35

Sanicro® 35 (UNS N08935)  is a newly developed alloy combining the best features of a high performance austenitic stainless steel and nickel based alloys. This grade has excellent corrosion resistance in combination with a high mechanical strength.

NOTE: Sanicro®35 is a trademark owned by Alleima AB and produced as plates and sheets by Outokumpu under a license agreement.

• Excellent resistance to pitting and crevice corrosion
• Excellent resistance to stress corrosion cracking (SCC)
• High resistance to uniform corrosion in acid and caustic environments
• High resistance to erosion-corrosion
• Very high mechanical strength
• Good weldability using nickel based alloy consumables.

Sanicro® 35 complies with NACE MR0175/ISO 15156-3 as a type 4a and 4c material, with significantly higher environmental limits than 6Mo grades like Ultra 254 SMO. Additionally, cold worked Sanicro® 35 (to 965 and 1240 MPa) has been tested in a NACE MR0175/ISO 15156 Test Level VI environment according to NACE TM0198 with no indication of SCC.

Ultra Alloy 825

Outokumpu Ultra Alloy 825 (W.-Nr. 2.4858, UNS N08825, ISO NW8825) is a titanium stabilized austenitic nickel base alloy with an addition of copper.

• Excellent resistance to stress corrosion cracking
• Very good resistance in oxidizing and reducing acids
• Moderate resistance to pitting and crevice corrosion
• Good mechanical properties also at elevated temperatures
• Reduced risk for sensitization when used in temperature ranges where this is a problem for stainless steels.

Outokumpu Ultra Alloy 825 is listed in ISO 15156-3 (NACE MR0175), materials for oil and gas production, and in NACE MR0103, materials resistant to sulfide stress cracking.

Ultra 317L

Ultra 317L is a Mo alloyed austenitic grade with higher corrosion resistance than “316L”. It is used, for instance, in chemical processing industry applications.

Ultra 725LN

Ultra 725LN is a high Ni and Mo austenitic grade with similar corrosion resistance to Ultra 904L. Typically used in Urea applications. Available as plate only.

Ultra 3964

Ultra 3964 (1.3964) is an austenitic stainless steel and is characterized by its high corrosion resistance, excellent mechanical properties and low permeability.

Therma 253 MA®

Therma 253 MA is a stainless steel with excellent oxidation and creep resistance in cyclic conditions that is best employed in temperatures up to 1150 °C/2100 °F. There is a slight susceptibility to embrittlement during continuous operation at 600–850 °C/1110–1560 °F.

Therma 310S/4845

Austenitic heat resisting 4845 grade with very good oxidation resistance. This grade 4845 belongs to austenitic chromium-nickel stainless steel grades. A specific feature for 4845 grade is high chromium and high nickel contents, which make this grade suitable for use in high temperatures. A common feature of Outokumpu high temperature steels is that they are designed primarily for use at temperatures exceeding ~550 °C, i.e. in the temperature range where creep strength as a rule is the dimensioning factor and where HT corrosion occurs. Optimising steels for high temperatures has meant that their resistance to aqueous corrosion has been limited. All steels are austenitic, resulting in relatively high creep strength values.

Characteristic properties
• Good resistance to oxidation
• Good resistance to high-temperature corrosion
• Good mechanical strength at elevated temperatures

Therma Alloy 800/800H

The Therma range contains heat-resisting stainless steels and alloys for use in applications with high service temperatures normally > 550 °C/1020 °F. Outokumpu Therma Alloy 800/800H & 800T is a series of high temperature alloys design for high creep strength, resistance to carburization, oxidation, and other types of high-temperature corrosion.

Therma Alloy 800 series (EN 1.4876/1.4958/1.4959, UNS N08800/N08810/N08811) are stabilized austenitic alloys with high Nickel and Chromium content as well as controlled additions of Carbon, Titanium and Aluminum. Additionally, grain size is controlled for improved creep strength properties.

Therma Alloy 800T

The Therma range contains heat-resisting stainless steels and alloys for use in applications with high service temperatures normally > 550 °C/1020 °F. Outokumpu Therma Alloy 800/800H/800T is a series of high temperature alloys design for high creep strength, resistance to carburization, oxidation, and other types of high-temperature corrosion.

Therma Alloy 800 series (EN 1.4876/1.4958/1.4959, UNS N08800/N08810/N08811) are stabilized austenitic alloys with high Nickel and Chromium content as well as controlled additions of Carbon, Titanium and Aluminum. Additionally, grain size is controlled for improved creep strength properties.

Therma 4828

Austenitic grade with improved oxidation resistance. Commonly used for furnace equipment (esp. supporting parts), annealing and hardening boxes, air heaters.

A common feature of Outokumpu high temperature steels is that they are designed primarily for use at temperatures exceeding ~550 °C, i.e. in the temperature range where creep strength as a rule is the dimensioning factor and where HT corrosion occurs. Optimising steels for high temperatures has meant that their resistance to aqueous corrosion has been limited. All steels are austenitic, resulting in relatively high creep strength values.

Therma 309S/4833

Austenitic grade with improved oxidation resistance. Commonly used for furnace equipment, annealing boxes, thermo wells, baffle plates and salt pots.

A common feature of Outokumpu high temperature steels is that they are designed primarily for use at temperatures exceeding ~550 °C, i.e. in the temperature range where creep strength as a rule is the dimensioning factor and where HT corrosion occurs. Optimising steels for high temperatures has meant that their resistance to aqueous corrosion has been limited. All steels are austenitic, resulting in relatively high creep strength values.

Therma 314/4841

Austenitic heat resisting grade with excellent oxidation resistance. Commonly used for furnace equipment, super heater suspensions, enameling grates etc.

A common feature of Outokumpu high temperature steels is that they are designed primarily for use at temperatures exceeding ~550 °C, i.e. in the temperature range where creep strength as a rule is the dimensioning factor and where HT corrosion occurs. Optimising steels for high temperatures has meant that their resistance to aqueous corrosion has been limited. All steels are austenitic, resulting in relatively high creep strength values.

Therma 4910

Austenitic creep resisting grade with good resistance to stress relaxation cracking. Therma 4910 belongs to the austenitic chromium-nickel-molybdenum stainless steel grades. A specific feature for Therma 4910 grade is high creep resistance as a result of nitrogen and boron alloying, which makes this grade suitable for use in high temperatures. The low carbon content is unusual in creep resisting steels and together with absence of strong carbide forming elements such as titanium and niobium, carbide precipitation leading to stress relaxation cracking is minimized.

A common feature of Outokumpu high temperature steels is that they are designed primarily for use at temperatures exceeding ~550 °C, i.e. in the temperature range where creep strength as a rule is the dimensioning factor and where HT corrosion occurs. Therma 4910 is intended for use up to about 800°C. Optimising steels for high temperatures has meant that their resistance to aqueous corrosion has been limited. All steels are austenitic, resulting in relatively high creep strength values.

Characteristic properties:

• Good resistance to oxidation, suitable for use up to about 800 °C
• Good resistance to high-temperature corrosion
• Excellent mechanical strength at elevated temperatures
• Resistance to stress relaxation cracking, useful especially in the heat affected zone of weldments
• Although not intended for wet corrosion applications,  the presence of molybdenum and nitrogen is beneficial for pitting  corrosion resistance in chloride environments

Prodec 304/4301

Prodec 304L/4307

A version of Core 304L/4307 with improved machinability. Improves productivity with faster machining, longer tool life, better dimensional tolerances, superior machined surface quality, and improved yields compared to conventionally produced Core 304L/4307.

Prodec 316/4401

Prodec 316L/4404

Prodec 316L/4404 is a version of Supra 316L/4404 with improved machinability. Improves productivity with faster machining, longer tool life, better dimensional tolerances, superior machined surface quality, and improved yields compared to conventionally produced Supra 316L/4404.