Stud Bolts, Nuts, Screws, Threaded Rod & Washers
Xylan is the largest, most complete line of fluoropolymer coatings in the world. Xylan coatings have a broad range of properties which make them ideal for an infinite variety of applications.
Xylan coatings differ from traditional fluoropolymer coatings in one very important aspect: they are composite materials. Lubricants with the lowest known coefficient of friction are combined in a matrix with the newest high temperature resistant organic polymers. Xylan Coatings offer many benefits for offshore service. These include resistance to corrosion and chemical attack, superb sub- sea visibility, lower maintenance costs and less downtime. United, these polymers form “plastic alloys” with highly beneficial properties :
Xylan Coated Stud Bolts
|Grade||Steel||Service||Temperature Range||Base Coat||Thickness||Top Coat||Thickness||Color|
|ASTM A193 Grade B7 /
A194 Grade 2H
|Alloy / Carbon Steel||Non-Sour||upto 232°C||Zinc Nickel
|8 to 13 µm||XYLAN 1014
|20µm ±5µm||Blue, Red, Green|
|232°C upto 325°C||Ceramic Xylar-2||25µm ±5µm||Silver|
|ASTM A193 Grade L7 /
A194 Grade 4/7
|Alloy Steel||Non-Sour||-45°C upto 232°C||Zinc Nickel
|8 to 13 µm||Blue, Red, Green|
|232°C upto 325°C||Ceramic Xylar-2||25µm ±5µm||Silver|
|ASTM A193 Grade B7M /
A194 Grade 2HM
|Alloy / Carbon Steel||Sour||upto 232°C||Zinc Nickel
|8 to 13 µm||Blue, Red, Green|
|232°C upto 325°C||Ceramic Xylar-2||25µm ±5µm||Silver|
|ASTM A193 Grade L7M /
A194 Grade 7M
|Alloy Steel||Sour||-45°C upto 232°C||Zinc Nickel
|8 to 13 µm||Black, Red, Blue, Green|
|232°C upto 325°C||Ceramic Xylar-2||25µm ±5µm||Pumpkin Orange, Red, Blue, Green|
|ASTM A193 Grade B8M Class 2 /
A194 Grade 8M
|Stainless Steel||ASME 150#-2500# Flanges||-100°C upto 232°C||Degreased / Cleaned||N/A||Red, Blue, Green|
|ASTM A453 Grade 660 Class B||232°C upto 325°C||Ceramic Xylar-2||25µm ±5µm||Green|
|ASTM A453 Grade 660 Class D||Stainless Steel||API 5000# Flanges||-100°C upto 232°C||Degreased / Cleaned||N/A||Red, Blue, Green|
|Zeron 100 FG - ASTM A276 UNS S32760 Condition S||Super Duplex Steel||API 5000# Flanges||-46°C upto 232°C||Degreased / Cleaned||N/A||Red, Blue, Green|
|Alloy 925||Nickel Alloy||Non-Sour||-100°C upto 232°C||Degreased / Cleaned||N/A||Red, Blue, Green|
Fluoropolymer coatings have the lowest coefficient of friction of all known fastener coatings, which requires that “makeup torque” specification be adjusted to compensate.
Many factors affect the determination of the ideal torque value to achieve recommended clamping loads (K-factor). The coefficient of friction (CoF) is only one. The K (or nut) factor varies, since it is the net effect of many variables such as type of fastener, thread, thread angle, type of pretreatment, etc. It would be inappropriate for Whitford to offer K-factor information when Xylan is only one of the many variables involved. The same lot of Xylan 1424 applied to different types of fasteners can result in a reduction of makeup torque from 30 all the way to 70 percent, caused by the differences in fasteners. Note: Makeup torque will not vary on fasteners of the same size and make.
Every bolted joint is unique, and the optimum tightening torque should be determined for each by careful testing. A properly tightened bolt is stretched so that it acts like a rigid spring, pulling the mating surfaces together. Whitford recommends a direct-tension (load-cell) study for every size and type of fastener you are using, routine practice in the construction industry.
Corrosion comes in many forms: atmospheric, galvanic, chemical, fretting, salt-fog, etc.
Stainless steel needs oxygen to provide an oxide layer that inhibits corrosion. So it would not be fair to compare Xylan to stainless steel in an ASTM B-117 salt-fog test when the end use is buried in hot soil. Of course stainless steel will outperform Xylan in the salt-fog test, although Xylan will outperform stainless steel when buried in hot soil.
In coastal environments, stainless steel is susceptible to chloride-induced stress-corrosion cracking (chemical corrosion). Xylancoated carbon-steel bolts are not affected by chlorides.
Stainless-steel fasteners also gall and seize. It is common knowledge that stainless-steel fasteners need to be retorqued after 24 hours due to galling, losing up to 40% of their clamping force in 24 hours. But Xylan-coated carbonsteel fasteners reach the required clamp load on the first makeup.
When stainless steel is combined with dissimilar metals, galvanic corrosion results. Xylancoated carbon steel in combination with any alloy does not lead to galvanic corrosion.
Perhaps the most striking difference of all is that stainless-steel fasteners can cost twice as much as Xylan-coated carbon-steel fasteners.
|Chemical||Xylan 1014||Xylan 1400||Xylan 1424|
|HCl (concentrated) at room temperature||Severe blisters, rust||Severe blisters, rust||No effect|
|HCl (pH 2) at room temperature||Slight marks||Slight marks||No effect|
|HCl (pH 2) at 125 ̊F (1)||Slight marks||Slight marks||No effect|
|NaOH (50%) at room temperature||Severe failure, blisters||No effect||No effect|
|NaOH (pH 12.5) (1)||Severe failure, blisters||No effect||No effect|
|NaOH (pH 9.5) at 125 ̊F (1)||Slight marks||Very slight marks||No effect|
|NaOH (pH 9.5) at 125˚F||Slight marks||Slight marks||Slight marks|
|MEK at room temperature||Slight marks||Slight marks||Slight marks|
|Toluene at room temperature||Slight marks||Slight marks||Slight marks|
|Ethylene glycol at room temperature||No effect||No effect||No effect|
|Salt spray for 1488 hours||20% red rust, adhesion loss||e1d5g%e rbelids treursitn, gdense||<15% red rust|
|Kesternich||4 cycles, 20+%, red rust, adhesion loss||r3u0s tc, ybclliesst,e r1in%g red||30 cycles, <15% red rust|
|Castrol Hydraulic Fluid at 200˚F||Not recommended||nGloo lsoss sd ienc rceoaastien,g||Gloss decrease, no loss in coating integrity|
|W. Canning Oceanic
HK-540 at 200˚F
|Not recommended||Gloss decrease, no loss in coating integrity, slight color lightening||Gloss decrease, no loss in coating integrity, slight color lightening|
|Tensile strength||psi||2,000 to 4,000|
|Elongation||%||35 to 50|
|Water absorption Service temperature||%||0.03|
|Pencil hardness||H to 6H|
|Dielectric strength||v mil||1,200 to 2,000|
|Coefficient of friction Wear resistance (K-factor)||cu. in.- min.x 1010/1 lb. - ft. - hr.||0.02 to 0.10|
|6 to 8|
The data presented below are intended to be used only as a guide. Your choice of Xylan coating must be subjected to your test procedures prior to its use in any chemical environment. All tests were conducted at room temperature except as noted. All test results assume a pinhole-free coating film.
|Deionized - boiling||100||1000||None|
|Tap 250 ̊F/120 ̊C @10,000 psi||100||24||None|
|(125 ̊F/50 ̊C)||2 pH||300||None|
|Picric Base||Saturated solution||120||None|
|Caustic (125 ̊F/50 ̊C)||9.5 pH||300||Slight|
|(12, 22, 113)||100||1500||None|
|Skydrol (hydraulic fluid)||100||1500||None|
|JP-4 (jet fuel)||100||1500||None|
|Brake fluid (auto)||100||1500||None|
|H O + gas at 250 ̊F/2||79% CH ,6%4||24||None|
Cf is a term much misunderstood and depends upon many factors including pressure, speed and temperature. The friction of Xylan coatings is relatively constant over a range of increasing pressure from 0.2 psi to 400,000 psi and from liquid hydrogen temperatures of -420° to +550°F (-250° to 285°C). As speed increases, the Cf increases but remains well below (better than) the values of other dry-film lubricants. Because of the film transfer of PTFE from coating to mating part, frictional values are similar for all mating materials as long as the surface finish is 50rms or better (smoother). Frictional oscillation (stick-slip, chatter) is virtually nonexistent. It is this ability to perform uniformly over a wide range of conditions that distinguishes these coatings from other dry-film lubricants.
Topcoats can be used with a variety of pre-treatments and primers to achieve varying levels of corrosion performance >5000 hours ASTM B117 salt spray resistance.
|Product||Zn Phos.||Zn Plate||Zn Ni Plate||Xylar*|
For application follow Whitford guidelines - use a capable or Whitford recommended applicator *Data based on 0%RR (Industry standard failure = 15%RR)
|Test||ASTM||Xylan 1070||Xylan 1400||Xylan 1424||Xylar|
|Dry-Film Thickness||D1186||15-25 µm / 0.6-1.0 mils|
|Film Hardness||D3363||2H - 4H||2H - 3H||2H - 3H||>3H|
|Coefficient of Friction||G99||0.05 to 0.12||-||0.05 to 0.09||0.11 to 0.13|
|Working Temp. Range||-||-195°C to +260°C||-50°C to +190°C||-50°C to +175°C||-40°C to +535°C|
1014 and 1070 were the first Xylan fastener coatings, introduced in the mid-1970s and still going strong. They provide outstanding lubrication for predictable makeup and break-out torque, and they have outstanding chemical resistance. Another advantage: They tolerate temperatures from -425˚F/-255˚C to +550˚F/+290˚C continuously. Xylan 1070 has added corrosion inhibitors.
The 1400 series is the hand-spray version of the Xylan 5000 series dip/spin products (more on these later). The 1400 series does not have quite the wide temperature range of the 1000 series, although they have nearly three times the corrosion resistance applied over any given pretreatment. Xylan 1400 series coatings can be made in any color, including white. They also have better chemical resistance to bases than the 1000 series. Xylan 1400 series reaches complete cure at 400˚F/205˚C, ideal for most coating operations. Xylan 1400 series coatings work best for onetime installations, where the fastener will be coated, installed, and left alone.
Xylan 1424 and 1427 are the environmentally friendlier combination of the 1000 and 1400 series coatings, combining the best of both. Xylan 142X coatings have all the chemical resistance of the 1400 series with the lubricant levels of the 1000 series products. However, the 142X series products do not have the wide temperature range, performing best between -40˚F/-40˚C to +350˚F/+175˚C.
These have all the attributes of their handspray cousins, except that they are formulated for application via dip/spin equipment. Xylan 5000 series products are specified for fasteners by the major automotive companies, building constructors and appliance manufacturers.
Xylan coatings (or any thin-film coating) cannot by themselves provide complete corrosion protection. For maximum performance, primers or pretreatments are required. The best are:
These fall into three common categories, all of which Whitford offers: barrier, inhibitive and sacrificial.
A barrier coating stands between the metal fastener and the environment. This is usually an organic coating with fillers that help stop moisture or vapor from permeating the film to the metal and becoming an electrolyte.
An inhibitive coating is usually an organic coating with corrosion inhibitors, such as zinc phosphates, chromates, and many more. In addition to acting as barriers, they help prevent corrosion by using pigments that provide an inhibitive effect, reacting with the absorbed moisture in the coating, then reacting with the steel to passivate it and decrease its corrosive characteristics.
A sacrificial coating is usually a metal or inorganic coating containing metal particles (often zinc). If the coating is damaged, they act as a sacrificial anode and corrode to protect the steel substrate, sacrificing themselves by galvanic action. These can also be electroplated like zinc or cadmium
|Product||Comments/Uses||Low Friction||Corrosion Resist.||Abrasion Resist.||Thickness||Cure Temp. °C/#mins (PMT)||Working Temperature|
|Xylan 1010||Dry-film lubricant for any wear surface to reduce friction, prevent scoring and galling, and provide secondary lubrication in the event of failure of the primary (conventional) lubricant. In addition to its low coefficient of friction (0.02-0.10), Xylan 1010 has good release properties, good chemical and abrasion resistance, and operates at temperatures up to 500 ̊F/260 ̊C continuous (550 ̊F/285 ̊C intermittent).||10||4||3||20 ± 5 m||220-345/ 20-5min||-195°C to +260°C|
|Xylan 1014||Similar to Xylan 1010, but with significantly more bonding resin relative to its content of polytetrafluoroethylene (PTFE) lubricant. This provides a finish that is harder, more abrasion-resistant, glossier and less porous. Friction values remain low and predictable.||8||5||4||20 ± 5 m||220-345/ 20-5min||-195°C to +260°C|
|Xylan 1052||Dry-film lubricant formulated with PTFE and MoS2 for high-pressure, low-speed wear applications. Its unique chemistry provides dependable, bonded lubrication for bearing surfaces subjected to extreme pressures of up to 10,500 kg/cm2 (150,000 psi). Xylan 1052 operates at temperatures up to 500 ̊F/260 ̊C continuous (550 ̊F/285 ̊C intermittent).||6||4||4||15 ± 5 m||220-345/ 20-5min||-195°C to +260°C|
|Xylan 1070||Highly corrosion-resistant, low-friction coating designed to reduce make-up and break-out torque, even after prolonged exposure to corrosive environments. Xylan 1070 also offers good wear and abrasion resistance.||8||6||4||20 ± 5 m||220-345/ 20-5min||-195°C to +260°C|
|Xylan 1212||Waterborne thin-film barrier coating with excellent corrosion resistance, ideal where tolerance is critical and lubrication unnecessary.||NNS||8||4||20 ± 5 m||175-205/ 60-15min||-20°C to +180°C|
|Xylan 1213||Waterborne, dry-film lubricant designed for high-pressure/low-speed applications. When combined with Xylan 1212 offers good corrosion and abrasion resistance.||8||6||4||17.5 ± 2.5 m||205-275/ 10-5min||-20°C to +180°C|
|Xylan 1270(1400)||A low-cost alternative to Xylan 1070 (1424), but with less lubrication. For fasteners where reduced makeup torque is not necessary.||5||7||3||20 ± 5 m||180-260/ 30-5min||-50°C to +200°C|
|Xylan 1311||Similar to Xylan 1331 with less PTFE. Use when abrasion resistance is more important than lubrication and/or nonwetting properties. Considered an economical single-film coating.||NNS||9||8||22.5 ± 2.5 m||375-400/ 15-5min||-20°C to +230°C|
|Xylan 1331||Dry-film lubricant with PPS and PTFE for outstanding wear/abrasion resistance. The high percentage of PTFE provides a lubricious, nonstick surface. This resin-bonded coating has excellent corrosion and chemical resistance and is virtually unaffected by any solvents up to 205 ̊C (400 ̊F).||NNS||9||6||22.5 ± 2.5 m||375-400/ 15-5min||-20°C to +230°C|
|Xylan 1424||Waterborne/VOC-compliant, highly corrosion-resistant, dry-film lubricant designed for use on any mating surface requiring lubrication. Xylan 1424 reduces make-up and break-out torque and also offers excellent chemical and abrasion resistance. Similar to Xylan 1014.||8||8||4||17.5 ± 2.5 m||205-275/ 15-5min||-20°C to +180°C|
|Xylan 1425||Waterborne, dry-film lubricant formulated with PTFE and MoS2 specifically for high-pressure, lowspeed wear applications. Its unique chemistry provides dependable, bonded lubrication for bearing surfaces subjected to extreme pressures up to 10,500 kg/cm2 (150,000 psi). Xylan 1425 operates well in harsh chemical environments and at temperatures up to 190 ̊C (375 ̊F). Similar to Xylan 1052.||6||6||4||17.5 ± 2.5 m||205-275/ 15-5min||-20°C to +180°C|
|Xylan 1427||Waterborne, low-friction, highly corrosion-resistant fastener coating designed to reduce make-up and break-out torque, even after prolonged exposure to corrosive environments. Xylan 1427 also offers excellent chemical, wear and abrasion resistance.||6||8||4||17.5 ± 2.5 m||205-275/ 15-5min||-20°C to +180°C|
|Xylan 1514||UV-resistant, dry-film lubricant with excellent low friction. Xylan 1514 is designed for highly visible, decorative applications where stain resistance and easy-clean properties are required. This coating also offers some corrosion and abrasion resistance and is considered the most lubricious in the series.ns, light fittings, personal-care products, radomes, I-O drives, etc.||9||3||4||20 ± 5 m||220-275/ 30-5min||-40°C to +220°C|
|Xylan 1756 over 4289||Multicoat FEP system, typically used for mould release and industrial bakeware.||4||8||3||4289 = 15 ± 3 m 1756 = 15 ± 5 m||375-420/ 10-5min||-195°C to +205°C|
|Xylan 4090||Optional primer for use under the 1000 series of coatings. Note: clear coating also known as Primer P92||NNS||6||4||20 ± 5 m||220-345/ 20-5min||-195°C to +285°C|
|Xylan 5110||A waterborne, low-friction, dip-spin coating for applications where a particularly wide operating temperature range is required - up to 260°C (500°F). Xylan 5110 is free of all restricted heavy metals, and is available in a range of colours (excluding light shades). Typical applications include screws and threaded fasteners.||6||2||3||6 ± 1 m||220-315/ 20-5min||-195°C to +265°C|
|Xylan 5164||A solvent-borne, low-friction, dipspin coating that has particularly good UV resistance. This coating is often used to provide product identification as it is available in a wide range of colours, including white. Xylan 5164 is free of all restricted heavy metals. Typical applications include wood screws and threaded fasteners.||8||3||4||7 ± 1 m||220-275/ 30-5mins||-40°C to +220°C|
|Xylan 5230||A solvent-borne, controlled-friction dip-spin coating that has been designed particularly for the automotive industry. It offers controlled torque tension coupled with extremely good corrosion resistance and can withstand 240 hours salt-spray when applied over a phosphate pretreatment. This coating also has good resistance to all automotive fuels, lubricants and fluids. Xylan 5230 resists chipping and flaking and is easy to apply.||3||7||3||7 ± 1 m||180-260/ 30-5min||-50°C to +200°C|
|Xylan 5250||A solvent-borne dip-spin coating with extremely good corrosion resistance and good UV resistance. It is ideal for use in the roofing and appliance industries where general weathering resistance is required, and is available in a range of colours. Typical applications include roofing fasteners, screws, stampings and end-caps.||NNS||7||3||7 ± 1 m||190-220/ 30-10min||-50°C to +200°C|
|Xylan 5270||A solvent-borne dip-spin coating with excellent corrosion resistance. Similar to Xylan 5230, but without the low-friction properties. Xylan 5270 is available in a range of colours, including white.||3||7||3||7 ± 1 m||180-260/ 30-5min||-50°C to +200°C|
|Xylan 5420||A waterborne, PTFE-containing dipspin coating with excellent corrosion resistance. This coating can offer low friction and abrasion resitance properties similar to Xylan 5230, but also has improved corrosion resistance, as well as being more environmentally friendly. Xylan 5420 is low in VOCs and is free of all restricted heavy metals. Great for use on small fasteners and hardware.||3||7||3||7 ± 1 m||180-260/ 30-5min||-50°C to +200°C|
|Xylan 5430||A new generation of protective coatings for small fasteners and hardware. Similar to Xylan 5420 (low VOCs), but with improved UV protection.||3||7||3||7 ± 1 m||180-260/ 30-5min||-50°C to +200°C|
|Xylan 5611||A solvent-borne, zinc-rich coating that gives sacrificial anodic protection against corrosion. Xylan 5611 offers excellent corrosion and abrasion resistance. It is available in a silver-grey colour, and can also be used as a primer for other Xylan coatings. Xylan 5611 is widely used in the roofing and appliance industries for the bulk application of items such as threaded fasteners, screws, stampings and end-caps.||NNS||8||6||7 ± 1 m||205-220/ 10-5min||-55°C to +175°C|