Jual Plat Corten Steel

Kategori: Corrosion Resistant / Weather Resistant Steel
Grades: Corten A,  Corten B
Standard: ASTM A 588

Characteristic

Corten steel (often referred to as Cor–Ten) is a weather resistant steel grade which could more accurately be termed as an “Atmospheric Corrosion Resistant Steel”. Weathering means that due to their chemical compositions COR-TEN A and COR-TEN B steels, when utilised unprotected, exhibits increased resistance to atmospheric corrosion compared to unalloyed steels. This is because it forms a protective layer on its surface under the influence of the weather.

Corten steel is a copper chromium alloy steel – this alloy displays a greater level of resistance to atmospheric weathering when compared to other unalloyed steels. It’s chemical composition promotes the early formation of an adhering protective layer of rust when exposed to the elements.

The corrosion retarding effect of the protective layer is produced by the nature of its structure components and the particular distribution and concentration of alloying elements in it. The layer protecting the surface develops and generates continuously when subjected to the influence of the weather.

Formation, duration of development and protective effect of the covering layer on weathering steels depend largely upon the corrosive character of the atmosphere. Its influence varies and depends mainly upon general weather condition (e.g. continental) macroclimate (e.g. industrial, urban, maritime or countryside climate) and the orientation of the structure components (e.g. exposed to or shaded from the weather, vertical or horizontal position). The amount of aggressive agents in the air has to be taken into account . In general the covering layer offers protection against atmospheric corrosion in industrial, urban and countryside climate.

Availability

COR-TEN A applies to plates up to 12.5mm in thickness,
COR-TEN B applies to plates up to 50mm in thickness.

Basic guidles for the use of this steel in the unprotected condition are described in EN 10025-5 and DASt rule 007.

The entire application technology is of fundamental importance for the performance of the products made from this steel. It must be taken into account that not only general climate conditions but also specific unfavourable local climate conditions in the broadcast sense as well as details of a construction may affect the corrosion behaviour of unprotected weathering steel. The dependency on these facts makes it understandable that no warranty can be given. It is recommended to control the corrosion progress of protected parts out of weathering steel exposed to the influence of weather in reasonable time intervals. A minimum thickness of 5mm is recommended when exposed to the weather in the unprotected condition.

To use the benefits of the higher atmospheric corrosion resistance of COR-TEN in comparison to unalloyed steel it is necessary that design and execution of structures as well as the performance of maintenance works allow an impeded formation and regeneration of the protective rust layer. The methods must meet the latest requirements of technical progress and must be suited for the proposed application. Due consideration must be given to relevant construction specifications.

Chemical Composition (heat analysis, %)

Grade C Si Mn P S Cr Cu V Ni
 COR-TEN A 0.12 0.25-0.75 0.20-0.50 0.07-0.15 0.030 0.50-1.25 0.25-0.55 0.65
 COR-TEN B 0.16 0.30-0.50 0.80-1.25 0.030 0.030 0.40-0.65 0.25-0.40 0.02-0.10 0.40

In order to obtain fine grain structure a sufficient amount of nitrogen absorbing elements is added (e.g. ≥0.02% Al).

Mechanical Properties

At room temperature for plates ≥3mm in thickness (transverse test specimans, according to EN 10002). Requirements to hot rolled plates ≤3mm in thickness according to EN 10025-5.

Grade Minimum yield point (ReH Mpa *) Tensile strengthRm MPa Minimum elongation A (Lo=5.65 √So) %
COR-TEN A 355 470-630 20
COR-TEN B ≤16 355 470-630 20
COR-TEN B > 16 ≤50 345 470-630 20

*) 1 Mpa = 1N/mm2

In case of cold rolled material the yield point is min. 310 Mpa and the tensile strength min. 445 MPa. Furthermore cold rolled sheets ≤3mm in thickness made of steel grade COR-TEN A-F for increased demand to the cold formability is available. Mechanical properties: Yield point min. 275 Mpa; Tensile strength min. 410 Mpa; elongation min. 25%. Tolerances on dimensions and shape according to EN 10131.

The notched-bar impact energy is determined on ISO-V longitudinal test specimans at a temperature of – 20°C as an average of three tests. For product thicknesses ≥10mm the average value is at least 27 J. For thicknesses between 10mm and 6mm, the minimum impact value is reduced proportionally to the speciman width (product thickness).

No impact test is performed on products below 6mm in thickness.

Number of Tests

1 tensile test

 1 test specimen per 40 t from eachheat*)

1 notched bar impact test  (3 specimens)

1 set specimens per 40 t from each heat *)

(at test temperature -20°C)

*) as referenced in EN  10025-5

Forming

The conditions for hot forming are in accordance with those stated in EN 10025-5. For cold forming the statements according to table 6 of EN 10025-5 are valid. If the mechanical properties have undergone changes due to cold forming, the properties indicated in the table can be substantially restores by stress relieving – at least 30 minutes at 530°C – 580°C. For higher degrees of cold forming subsequent normalising is recommended.

Flame Cutting

COR-TEN is suitable for flame cutting provided proper operating methods are used. At temperatures below 5°C a sufficiently wide zone on either side of the intended cut should be preheated. If flame cut edges are to undergo cold forming, the hardening effect should be prevented by preheating – as in the case of S355J2 or the hardened zones must be worked off e.g. by appropriate grinding.

Welding

COR-TEN can be welded both manually and mechanically, provided the general rules of welding practices are observed. A prerequisite for obtaining identical mechanical properties in the weld and in the base material is the application of suitable welding consumables and the choice of appropraite welding conditions. To consider are EN 10025-5 – Technical delivery conditions for structural steels with improved atmospheric corrosion resistance

Recommendations
for welding are also given in EN 1011 part 1 and part 2 – Welding, Recommendations for welding of metallic materials-.

Lime basic electrodes, inert-gas welding wire, and wire/power combinations equivalent to the tensile strength of S355 are used as welding consumables

For unprotected use care must be taken that the welded joint is also weather resistant. This is possible by using welding consumables matching the base material.

If due to design or building specification stress relieving is required, it should be performed in the range temperature from about 530°C to 580°C.

Bolting and Riveting

Joining elements such as bolts, rivets and their accessories (nuts and washers) must be so selected that the formation of local electro-chemical cells are avoided. The joining elements should preferably consist of weathering steel.

At these joints capillary action can lead to permanent moisture resulting in increased corrosion. Critical zones should therefore be protected by painting, sealing or other protective measures.

In the case of high-strength connections (HV) the conditions for non-weathering structural steels as given in DIN 18800 part 1 apply.

Applications

The steel is used for various types of welded, bolted and riveted constructions e.g. steel frame structures, bridges, tanks and containers, exhaust systems, vehicles and equipment constructions.

Product Wear Plates:

Harga Plat Bisalloy 400

Harga Plat Bisalloy 400

Characteristic

Bisalloy400 is a through hardened, abrasion resistant steel plate , offering long life expectancy in high impact abrasion applications.

Chemical Composition (%)

Thickness C P Mn Si S Cr Mo B CE
(IIW)*
CET*
5 – < 16 Maximum 0.18 0.025 1.5 0.25 0.008 0.25 0.25 0.002 0.40 0.29
>= 16 – 80 Maximum 0.20 0.025 1.5 0.25 0.008 0.30 0.25 0.002 0.50 0.35
> 80 – 100 Maximum 0.18 0.025 1.5 0.25 0.008 1.20 0.25 0.002 0.58 0.34

Fabrication

Bisalloy400 is high hardness, abra sion resistant steel offering very good impact toughness properties.

Bisalloy400 provides an optimum combination of abrasion resistant, toughness and weldability. Due to its low alloy content, Bisalloy400 can be readily welded using conventional welding processes and low hydrogen consumables.

Cold forming of Bisalloy400 is achievable on all thicknesses although an allowance for the higher strength should be taken into account. Bending machine capabilities should also be taken into consideration prior to any forming operation. Heating above 250ºC should be avoided, otherwise mechanical properties may be affected.

Mechanical Properties

Properties Specification Typical
0,2% Proof Stress 1070 MPa
Tensile Strength 1320 MPa
Elongation in 50mm G.L 14%
Charpy Impact (longitudinal) +20ºC (10mm x 10mm) 55 J
Hardness 370 – 430 HB 400 HB

Application

Bisalloy400 offers excellent wear and abrasion resistant and impact toughness in applications which include:

• Dump Truck Wear Liners
• Screw Conveyors
• Chutes
• Storage Bins
• Earth Moving Buckets
• Cyclones
• Deflector Plates
• Ground Engaging Tools
• Cutting Edges

Product Wear Plates:

Creusabro 4800 & 8000

Characteristic

For wear and tear which is not only caused by impact and friction, we provide CREUSABRO 4800 and CREUSABRO 8000. These products have TRIP (Transformation Induced by Plasticity) character and micro carbides that make this product have an active surface resistance, so that this material can last better if there is an impact. This product o can also be used in medium temperature 250–450 C, where other resistance product which generates from water quenched process usually will not be functioning optimally.

Creusabro 4000
The new Creusabro concept-excellent ability to work harden and contribution of micro carbides-gives Creusabro 4000 high wear resistance, on average 4 times higher than ordinary mild steel and 30 % higher than conventional 4000 BHN water quenched steel.

To ease in fabricating, Creusabro 4000 is supplied by approximately 360 HB hardness. After the fabrication, the hardness of Creusabro 4000 can be reach 420 HB.

Chemical Composition:

C : 0.20 max
Mn : 1.40
Cr : 0.85 min
Mo : 0.10 min
Ni : 0.30
S : 0.010 max
P : 0.018 max

Applications:
Mines: Extractors, Unloaders, Spiral Chutes. Crusher, Grinders, Screens, Conveyor
Quarries and Construction Earth Moving: Shovels, Diggers, Graders, Bulldozers, Dumpers, Dredging machines, Crushers, Grinders, Screens, Hoppers, Mixers, Molds for concrete aggregates
Cement Plants, Refractory Products: Crushers, Hoppers, Chutes, Cyclone, Wheel Excavator Buckets Metallurgical Plant, Scrap recovery, etc

The Creusabro concept-excellent ability to work harden and the supplementary contribution of microcarbides, already used in Creusabro 4000 has been improved in the Creusabro 8000. this grade takes advantage of an additional metal working process: the TRIP effect (Transformation Induce by Plasticity). The combination of this properties give to the Creusabro 8000 an exceptional wear resistance in heavy plates with uniform properties throughout the thickness around 8 times that of the standard mild steel (A572 G65 grade). The properties in extreme conditions are 50% superior to standard water quenched steel (hardness 500HB).

Creusabro 8000

Creusabro 8000 is supplied with the hardness of 420 HB in order to easy the fabrication. After fabrication, the hardness of Creusabro 8000 can reach 540 HB.

Chemical Compositions:
C Mn Cr Mo Ni S P
0.280 max 1.60 max 1.60 max 0.20 min 0.40 0.005 max 0.015 max

Applications:

Mines, Coal mines: Extracting and load equipment, Hopper lateral liner plate, Helical gravity conveyor.
Quarries and Construction Earth Moving: Blades, Outside Stiffeners, Under teeth pads of loaders and shovel dippers, Crushers and Mills lateral armor plate, Feed crown-wheel, Sprocket-wheal.
Cement Plants: Liners for drier-tubes, Buckets, Hoppers, Clinker cooler outlet shields.
Iron and Steel Industry: Scrap recovery, Brick works, Agricultural equipment, etc.

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Plat FORA 400

Characteristic

FORA 400 is a water quenched maternistic steel, with a typical hardness of 400HB (42,5HRC), constituting a real answer to abrasive wear. Thanks to its toughness, its elevated hardness, its high yield strength, FORA 400 can be use wherever a wear resistance to wear by sliding or by moderate impacts is required. Moreover, FORA 400 is very easily welded and has a good forming properties thereby contributing to ease of fabrication.

Compared to conventional steels, such as S355, FORA 400 offers a real benefit to the equipment life times and permits a signifiant reduction in he design thickness since its wear resistance is up to 3 times longer than S355 grade.

Moreover, FORA 400 is very easily welded and has a good forming properties thereby contributing to ease of fabrication. This steel is particulary suitable for applications in quarries, construction industry, mines, cement plants, the iron and steel industry, etc.

Chemical Composition
C Mn Cr Mo S max P max
0.13 1.2 0.5 0.25 0.01 0.02

Applications
Quarries and Construction Earth Moving: Skimmers, crushers, screens, bunkers, bulldozers, etc.
Cement Plants: Buckets, crushers, bunkers, etc.
Mines, Coal mines: Excavator, winding and discharging machines, conveyors, etc.
Iron and steel industry: Bunkers, various casing, guide and shifting plates, etc.

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Related Wear Plates: