Thermal Insulation Products - Jacketing & Cladding

Sealumet (Australia) Pty LimitedMailing Address : PO Box 2218, Warwick, Perth, WA, 6024Warehouse : Unit 2, 6 Langar Way, Landsdale, Perth, WA - 6065Telephone : +618 6201 6153, Fax : +618 9303 4560E-mail: enquiries@sealumet.com Website: www.sealumet.comDISCLAIMERThese data sheets are based on specifications, data and test results at time of publication. No guarantee as to completeness, accuracy or results is either expressed or implied. The suitability foran intended use is the responsibility of the user. As choice of material, method of application and site conditions are beyond our control we accept no liability for direct or consequential damages.Any material proved to be defective within the published shelf life* will be replaced. *From date of supply.

Aludip BQ

High-integrity steelsAludip high-integrity steels offer a host of properties forperformance critical applications such as building, powergenerating, petrochemical and oil industries and in marineenvironments.

Aludip BQ high-integrity steels with dedicated properties:

• Strength• Corrosion resistance• Heat resistance and relectivity• Non-combustible• High-temperature oxidation resistance• Sag resistance• Zinc-free• Abrasion resistance• High-emissivity• Formable• Excellent surface for painting• Low radio-frequency interference

The Aludip range of high-integrity steels offers three products.Aludip BQ is the standard product in this range and is the basefor organic coated products, Aludip BQX and Aludip BQHE.

Aludip Building QualityAludip BQ is used as insulation cladding in the powergenerating, petrochemical, and oil industries. Its primary use isin the lagging of pipes, but it also used for ventilation ductingand building cladding. Its hot-dip aluminium-silicon alloycoating provides excellent corrosion resistance in demandingapplications.

Aludip Building Quality ExtraAludip BQX is based upon Aludip BQ, but has a protectiveorganic coating in addition to its alloy coating. It provides extraprotection against the harshest atmospheric corrosion, such assea spray and salt air attack, particularly in spaces that arenorth facing, poorly ventilated, and not regularly washed withfresh rainwater. Typical applications include offshore oilrigsand seashore termanails.

The organic coating on Aludip BQX is available in white orstandard grey and offers a uniform surface and colour forapplications that require enhanced appearance.

Aludip Building Quality High-EmissivityAludip BQHE has a high-demissivity coating and is suitable forapplications that require the surface to absorb a highproportion of ambient heat. A typical example is pipe claddingfor power stations. The special grey organic coating has anemissivity index exceeding 0.8. this coating also enhances

corrosion resistance, and ensures a consistent appearance ofAludip BQHE.

PropertiesStrengthAludip high-integrity steels have a Young’s modulus threetimes that of pure aluminium sheet. See figure 1 below fortypical mechanical properties.

Aludip high-integrity steels retain their strength at hightemperatures, as described below.

Figure 1: Mechanical propertiesGrade Tensile strength Elongation

Rm (N/mm2) A80 (%)Max Min

BQ, BQX and BQHE 500 22

Note: For thicknesses between 0.5mm and 0.7mm inclusive,the minimum elongation value (A80) shall be reduced by 2%.

Corrosion resistanceAludip high-integrity steels have excellent corrosion resistance,far superior to pure zinc and zinc-aluminium alloy coatings.See figure 2, which compares the coating loss of Aludip BQwith two other coatings. Zinc coating protect the steel substratethrough sacrificial oxidation. However, the zinc salts formed inthat process are constantly washed away, leaving the steelexposed. Aluminium protects the steel substrate by forming athin film of aluminium oxide, which does not wash off. The hot-dip aluminium-silicon alloy coating on Aludip high-integritysteels protects the steel substrate by forming an inert barrier.Cut edges and areas of subsequent damage corrode slightly,but stabilise in a short time, preventing corrosion formsignificantly impairing long-term performance.

The additional organic coatings on Aludip BQX and AludipBQHE further enhance their corrosion resistance.

Figure 3: Neutral salt spray testProduct Time to first corrosion (hours)BQ 1000BQX >1000BQHE >1000

High Temperature oxidation resistanceAludip high-integrity steels have excellent resistance tooxidation at elevated temperatures.

Heat resistance and reflectivityAludip BQ reflects approximately 80% of incident light and heat

SL0043

Thermal Insulation Products - Jacketing & Cladding

Sealumet (Australia) Pty LimitedMailing Address : PO Box 2218, Warwick, Perth, WA, 6024Warehouse : Unit 2, 6 Langar Way, Landsdale, Perth, WA - 6065Telephone : +618 6201 6153, Fax : +618 9303 4560E-mail: enquiries@sealumet.com Website: www.sealumet.comDISCLAIMERThese data sheets are based on specifications, data and test results at time of publication. No guarantee as to completeness, accuracy or results is either expressed or implied. The suitability foran intended use is the responsibility of the user. As choice of material, method of application and site conditions are beyond our control we accept no liability for direct or consequential damages.Any material proved to be defective within the published shelf life* will be replaced. *From date of supply.

Aludip BQContinued

at temperatures up to 500 deg C. Above that temperature, thesurface lustre is lose. At 500 deg C, all Aludip products retainhalf their mechanical strength; the integrity of the steel ismaintained up to approximately 1300 deg C. Aludip high-integrity steels are non-combustible as defined in BS 476, Part4. See figure 5 below.

Figure 5: Heat reflectivityTypical heat reflectivity (%) over timeMaterial Start 1 year 4 yearsAludip BQ 89.5 80.3 52.7Galvanised Steel 94.2 62.1 5.0Aluminium 94.8 80.4 58.7

Note: Typical figures (for guidance only) on the heat reflectivityof Aludip BQ and two other common materials.

Sag resistanceGood sag resistance means Aludip BQ high-integrity steelscan be used at elevated temperatures without sufferingdistortion.

Zinc-freeAludip high-integrity steels are zinc-free, and can therefore beused safely with stainless steel. They are free from risk ofliquid-zinc embitterment, which can cause stainless steel tofracture.

Abrasion resistanceThe abrasion resistance of Aludip BQ is at least as good asmild steels and galvanised steels.

FormabilityAludip high-integrity steels will withstand moderate lockseaming and forming and can be bent over a diameter equal totwice the thickness of the sheet. The metallic and organiccoatings are as formable as the steel substrate and will notflake or peel. Furthermore, the silicon incorporated in themetallic coating allows a thinner alloy layer with greaterductility than a pure aluminium coating.

PaintingThe superior corrosion resistance of Aludip BQ means thatunder normal conditions, it does not need painting. If theapplication requires painting, Aludip BQ has been tested by thePaint Research Association and found to be an excellent basefor paint, especially heat-resistant paint, with no need forexpensive pre-treatments. An initial primer coat can befollowed by a topcoat with a dry film thickness of less than halfthe 125 micrometres, usually recommended for exteriordurable systems.

CharacteristicsProduct range

Aludip BQHot-dip aluminium-silicon alloy coating on both sides.

Aludip BQXHot-dip aluminium-silicon alloy coating and organic coating onboth sides.

Aludip BQHEHot-dip aluminium-silicon alloy coating with high-emissivityorganic coating on top side and standard organic coating onreverse.

The applications of these products are described more fully onpages 1 and 2.

StandardAludip high-integrity steels are manufactured to EN 10154:2002, employing Quality Assurance principles, operatingpractices and controls certified to ISO 9001:2000.

Aludip conforms to other national and international standards,including ISO 5000, NFA 36/340, ASTM A463M, JIS G3114,and several proprietary specifications.

CoatingsMetallic coating mass.Hot-dip aluminium-silicon alloy coating mass: 240-270g/m2(Triple spot test).

BQX organic coating17um on top side and 10um on reverse. Topcoat colour isavailable in white or standard grey. Consult Sealumet aboutother colours.

BQHE organic coating25um high-emissivity on top side and 10um on reverse.Top coat colour is special grey. Consult Sealumet about othercolours.

DimensionsFigure 6 below shows the thickness and width manufacturinglimits for wide coils. ??

TolerancesTolerances on thickness, width, flatness and edge camberconform to EN 10143 : 2002. “Thickness” refers to the totalthickness of the product, including its coating. It is measured atleast 40mm from either edge or at the centre line.

Figure 7 below shows the tolerances on thickness. For coils1200mm wide or less, the tolerance on width is -0+5mm; forcoils greater than 1200mm wide, the tolerance on width is -

SL0043

Thermal Insulation Products - Jacketing & Cladding

Sealumet (Australia) Pty LimitedMailing Address : PO Box 2218, Warwick, Perth, WA, 6024Warehouse : Unit 2, 6 Langar Way, Landsdale, Perth, WA - 6065Telephone : +618 6201 6153, Fax : +618 9303 4560E-mail: enquiries@sealumet.com Website: www.sealumet.comDISCLAIMERThese data sheets are based on specifications, data and test results at time of publication. No guarantee as to completeness, accuracy or results is either expressed or implied. The suitability foran intended use is the responsibility of the user. As choice of material, method of application and site conditions are beyond our control we accept no liability for direct or consequential damages.Any material proved to be defective within the published shelf life* will be replaced. *From date of supply.

Aludip BQContinued

0+6mm.

Figure 7: Tolerance on thicknessNominal thickness Tolerance for a nominal width of> < <1200 >12000.50 0.60 0.06 0.070.60 0.80 0.07 0.080.80 1.00 0.08 0.091.00 1.20 0.09 0.101.20 1.60 0.11 0.121.60 2.00 0.13 0.14

Note: Half thickness tolerances are available. Please consultus for information.

Please consult Sealumet for details of additional processingservices, including the dimensions of cut lengths, profiles andother processed products.

Surface quality and treatmentAludip high-integrity steels are skin-passed to the requirementsof EN 10154 : 2002, surface ‘B’. Aludip BQ can be suppliedwith chemical passivation, protective oil, or both.

PackingPlain banded, paper wrapped, or full export packing isavailable.

Coil weightThe maximum coil weight is 19 tonnes.

Other specificationsPlease consult Sealumet for information about the availabilityof specifications outside those shown in this section.

The advantages of Aludip high-integrity steels• Low-cost alternative to stainless steel and aluminium • Greater mechanical strength than aluminium, allowing

lighter gauges to be used• Higher melting point of aluminium (650-660 deg C)

compare with zinc (419 deg C)• No risk of extensive pools of melted aluminium in a fire,

due to the low aluminium content of Aludip• Where material is to be painted, Aludip’s excellent

corrosion resistance saves on pre-treatments and paint• Safe to use with stainless steel• Products with enhanced appearance available

Using Aludip high-integrity steelsAludip high-integrity steels are high-performance products that

will give excellent service. Their performance is enhanced byproper processing and by good practice in end-product design.

Sealumet can help you choose the right Aludip product for yourapplication and can advise you on proper processing methodsto obtain the best results. Consult Sealumet for moreinformation about using Aludip high-integrity steels.

FabricationThe tightly adherent coating and its relatively thin alloy layergive good fabrication properties. Because the coating isrelatively soft, tolls should be well lubricated and more careshould be taken when fabricating Aludip high-integrity steelsthan when fabricating uncoated mild steel.

Welding Aludip BQGood welded joints can be obtained using most conventionalprocesses, together with modified procedures adapted to thespecial properties of the alloy coating. Resistance welding byspot or seam welding systems gives the same mechanicalstrength as welding bare steel. BS 1140 contains theparameters for spot welding; BS 6265 for seam welding.

Equally effective are rare metal active gas welding systems(sometimes called gas metal arc), which use consumableelectrode wire and gas shields such as argon or carbondioxide, or a mixture of the two. Pulsed metal active gassystems offer considerable advantages over conventionalprocesses, including more control over penetration and aminimum of spatter.

Consult Sealumet for advice about weldability of Aludip BQ.Aludip BQX and BQHE are not suitable for welding.

PaintingAludip BQX and Aludip BQHE are both pre-painted. Aludip BQprovides an excellent base for paint, both in its passivated andunpassivated forms.

StorageAludip BQ is normally supplied in the oiled and chromatedcondition to reduce the risk of water staining. However, it isessential that both sheet and coil be stored in dry, protectedconditions before use. The ingress of water or condensationcan lead to unsightly surface staining. Careful and well-managed storage will prevent such problems.

SL0043