Stainless Steel and Nickel Alloys

Ferritic Steel

Ferritic Steel

These steels contain a minimum of 17% chrome and carbon in the range of 0.08% - 2.00%. This percentage of chromium provides resistance to corrosion at higher temperatures. However it cannot be heat treated and so lacks the mechanical properties of other steels. It is magnetic as are martenistic steels and appropriate precautions must be taken when welding.

Ferritic stainless steel grades include 430, 405, 409, 434, 436, 442, and 446.

Martensitic Steel

Martensitic Steel

Containing a minimum of 12% chrome and generally no more than 14%  with a carbon content of between 0.08% and 2.00%. The high carbon content of this martensitic steel means it responds well to heat treatment to develop different mechanical strengths. Unfortunately the higher carbon content presents issues with welding. When properly heat trated they have a good mix of corrosion resistance and hardness making them suitable for a range of applications. While hard they are also the most brittle. 

Martenistic steels include grades 410, 414, 416, 420, 431 and 440

 

Austenitic Steel

Austenitic Steel 

These steel alloys have a chromium content between 17% & 25% and nickel between 8% and 20%. A number of other elements are added to achieve a wide range of properties. When fully annealed these steel alloys have a wide range of physical and mechanical properties.

They respond well to cold working. However, while generally non magnetic cold working can develop their magnetic properties.

Austenitic steels include 304, 316, 317, 321 and 347.

Duplex Steel

Duplex Steel

Duplex stainless steels are so called because their structure contains grains of both ferritic and austenitic stainless steel ( approximately 50% of each)

This composition produces an attractiv range of properties: 

• Strength: about twice that of austenitic or ferritic steels
• Toughness and ductility: better than ferritic but not as good as austenitic
• Corrosion resistance: a wide range depending on the specific other elements added but generally very good
• Cost: due to their lower nickel content they are generally less expensive than similar austenitic steels and due to their increased strength wall thikness can often be reduced resulting in both direct savings and additional implications for the overall installation

While world production of duplex steels is small - about 1% of toatl steel production in 2004 it has continued to increase initially led by demand from europe but now increasingly from China.

Tube/Pipe

Seamless & Welded Tubes and Pipes

Intamet stock from 3mm OD through 36" NB (914mm) in both Seamless and Welded manufacture. Available in a comprehensive range of both Metric and Imperial dimensions. Intamet offer probably the widest range in Europe, in numerous grades consisting of some 15000 line items within the following typical specifications:-

ASTM / ASME 

SA213 - A249 - A269 - A270 - A312 - A358 - A554 - A778 - A789 - A790 -A928 - 

EN 10216 / EN 10217

Fittings

Fittings

Intamet stock a comprehensive range of Seamless, Welded, Threaded and Socket Weld fittings, in numerous combinations covering elbows, tees, reducers, nipples, caps and unions etc. Intamet offer possibilities to make every connection and combination. Also available for instrumentation tube is a full range of single and twin ferrule compression fittings.

Fittings are supplied in general accordance with following dimensional and material specifications:

Butt Weld fittings      ASME B16:9 and B16:25. 
High Pressure Fittings (3000lb/6000lb) - Threaded and Socket Weld - BS 3799
Low Pressure Fittings (150lb) - Threaded BS 1740

ASTM / ASME
SA403 - SA815 (Butt Weld) 
SA182 - Forged Fittings
ASTM / ASME SA312 - Fittings manufactured from pipe
DIN 2605 / 2615 / DIN 2616 / DIN 2617 DIN Weld Fittings

Flanges

Flanges

Flanges are available to suit all pipes. The most popular being ASA - standard stock in 150lb and 300lb pressure rating, albeit also available in 600lb/900lb/1500lb and 2500lb ratings. Other standard stock includes BS 4504 PN 10 / PN 16 with PN 40 and PN 64 also being available on short lead time.

The three main types of flange are:-

• Slip - on
• Blind
• Weld Neck

Faces are typically raised face with a machined spiral facing to facilitate a gasket joint. Ring Type Joint facings are also commonly used in Petrochemical applications where the hub of the flange is thicker with an RTJ recess machined in to the face.

Related Specification
ASTM/ASME SA182 / ASME B16:5 
BS 4504
BS 10
DIN 2576 / 2633 / 2635 / 2527

Hollow Bar/Section

Hollow bars

Intamet Hollow Bars are often seen as a cost effective alternative against that of solid bars, offering quicker set up times, less tool changes and increased manufacturing output.

Manufactured by Hot Extrusion process and stocked from 32mm OD up to and including 400mm OD in grades 304/304L/316/316L/316Ti and 321, Intamet offer from stock in random lengths varying between 3 and 7 metres or in cut multiples. The OD of hollow bars will be a plus tolerance and ID to a minus tolerance. Being hot finished the surface can be of "orange peel" appearance and is not suitable for polishing prior to machining. Published tolerances for this material are generally calculated for component lengths up to 2.5 times that of OD, therefore, careful consideration of pre-material size is required.

Larger hollow bars are available as Centrifugally Cast and proof machined. This manufacturing process provides excellent concentricity, but limited in production lengths, normally not exceeding 2.5 metres.

Hollow section

HSquare and rectangular Hollow Sections are available in grades 304 and 316 up to 400mm x 400mm / 400mm x 300mm. Intamet's range starts at 10mm x 10mm. Stock lengths are typically 6 Metres. Sizes up to 100mm x 100mm are also stocked in 240 Grit Satin Polish, plastic sleeved. Larger dimensions can be polished to order.

A special service of mirror polishing on hollow sections is now available on a short lead time for wall thicknesses not exceeding 4mms. Additional services include in-house square and mitre cutting and sub contract laser cutting.

Bar/Angle

Bars & Angle

Intamet stock round, flat, square and hexagon bars, equal and unequal angles, 

Round bars are stocked from 3mm through 406.4mm diameter. The ranges 6mm through 30mm diameter are also available from stock in long lengths of 6 metre, offering significant benefits to architectural applications. 
Intamet flat bar range is extensive, and now available from 10mm up to 250mm wide. The most common being 4 metre cut and slit edged bars up to 15mm in thickness, for general applications. For thicker bars, and for applications requiring a “squarer” corner, a full range of high quality Hot Rolled bars are stocked in lengths of up to 5 metres. For special applications a premium range of Cold Drawn flat bar is also available from European stock on short lead time. 
Square bars are stocked in Cold Drawn and Hot Rolled condition from 6mm x 6mm through 80mm x 80mm.in random lengths of 3 to 4 metres. 
Hexagon bars from 8mm through 50mm across flats from stock in lengths of typically 3 metres. 
Intamet don’t just supply standard angles, the range of equal hot rolled angles are now available up to 200mm x 200mm x 12mm, together with a range of Hot and Cold Rolled unequal angles up to 150mm, and Laser Fusion manufacture from 100mm through 500mm. 
All bars can be cut and polished to customer requirements as one of many added services available from Intamet.

Special Profiles

Special Profiles

Intamet stock and supply a wide range of special stainless steel profiles manufactured by a number of processes including Hot and Cold Rolled, Laser Fused and Cold Drawn.

• Equal and Unequal Angles
• T Section
• Channel
• Beam
• Z Section
• Half Round

Stock lengths range 5.7 to 6.3 Metres. 
Longer lengths are available on production of up to 18 Metres, together with custom profile service from as little as 1000 Kgs per profile

Sheet/Plate

Sheet & Plate

Intamet supply Stainless Steel, Duplex and Nickel Alloy sheet and plate in Hot and Cold Rolled condition in a variety of dimensions and finishes.

Standard European Stainless Steel sheet and plate stock dimensions:-

• 1000mm x 2000mm
• 1250mm x 2500mm
• 1500mm x 3000mm
• 2000mm x 4000mm and 6000mm

Nickel Alloy Sheet and Plate stock dimensions (including USA)

• 914mm x 1828mm
• 1000mm x 2000mm
• 1220mm x 2440mm and 3660mm
• 1250mm x 2500mm
• 1500mm x 3000mm
• 1524mm x 3048mm

Plates can be supplied cut to size by the following processes:-

• Plasma Cut
• High Definition Plasma Cut
• Laser Cut
• Water Jet Cut

Note: In specifying cut plate it is good practice to advise of finish size as depending on plate thickness varying top to bottom taper can occur during cutting.

All plates can be polished to customer requirements as one of many added services available from Intamet.