China Professional manufacturer and exporter of Fluorocarbon Fluoropolymer PTFE Xylan 1070 coated A193 B7 Stud bolt
Fluorocarbon Coating (PTFE, Xylan, Teflon )
Fluorocarbon Coating is an organic coating consisting of solid lubricant dispersed in an organic binder and dissolved in a specially formulated mixture of solvents. It is also corrosion-resistant due to the use of a thermally cured thermosetting synthetic binding material. When applied to the substrates it resists galling, seizure and fretting and offers corrosion resistance.
Fluoropolymers are a class of synthetic polymers that contain fluorine atoms in the polymer chain, giving them unique properties like chemical resistance, high-temperature stability, low friction, and non-stick characteristics.
XYLAN coatings were originally developed out of fluroplastics (PTFE, etc ) but with continued development of polymers that can be used as binder systems and adhesion promoters , the performance of coatings has improved considerably .
Xylan® 1070 is a low friction coating with high corrosion resistance to oxidation and high temperatures. Similar to Xylan® 1427, this PTFE coating is ideal for leak prevention for tanks, valves, vessels, etc. in harsh environments.
XYLAN 1070
• Its basic use is for fasteners in marine use, in particular for drilling platform construction in the north sea . its main features are that it combines good corrosion protection with dry lubrication. The main benefits are:- significantly reduced torque required for a given pre- load.
• Much greater accuracy of pre- load for a given applied torque.
• Good protection against salt water corrosion ease of break – out of nuts (prevention of nut seizure) leading to ease of maintenance.
XYLAN 1070 coated Stud bolt production procedure
STEP ONE: Applying a base-coat such as Zinc-plating, Zinc-Nickel. The base coat has an average thickness of 10-15µ
STEP TWO: sand-shot blasting to roughen the surface of the fasteners to be coated.
STEP THREE: Having fasteners coated with PTFE Xylan 1070 or Xylan 1424 in the required color. See the table below for the top coat most suited to for your situation.
| Top coat | Comments: | ASTM B-117 Salt Spray test | Working Temperature |
| Xylan 1424. | Fluoropolymer Organic. Water-based. Average thickness topcoat: 16µ. | *In combination with Zinc-Nickel: up to 3300 hours | -20℃ to 180℃ |
| Xylan 1070 | Fluoropolymer Organic. Solvent-based. Average thickness topcoat: 16µ. | *In combination with Zinc-Nickel: up to 3900 hours | -195℃ to 260℃ |
STEP FOUR: Heat treatment of the coated fasteners is performed.
Benefits of PTFE Xylan 1070 coated Stud bolts
Benefits of PTFE Xylan 1070 Coated Stud Bolts:
1. Exceptional Corrosion Resistance:
- One of the primary benefits of Xylan 1070 coated stud bolts is their ability to provide superior corrosion protection. The PTFE (Polytetrafluoroethylene) coating makes these fasteners highly resistant to a wide range of chemicals, including acids, alkalis, solvents, and saltwater. This makes them ideal for marine, petrochemical, and offshore oil & gas industries where exposure to harsh environmental conditions is common. The coating forms a protective barrier that prevents corrosion, reducing the need for frequent replacements and repairson & Galling Prevention**:
- Xylan 1070 is known for its low friction properties, which help to reduce wear and tear on both the stud bolts and the components they are fastened to. This property is crucial in applications where bolts are frequently assembled and disassembled. The low friction also helps to prevent galling, a type of severe wear that can damage threads, making the bolts easier to install, remove, and tighten .
2. High-Temperature Stability coated stud bolts can withstand a wide range of temperatures, typically from -200°C to 260°C (-328°F to 500°F). This makes them suitable for both low-temperature environments, such as cryogenic systems, and high-temperature environments, such as those found in automotive, aerospace, and industrial machinery. Their ability to maintain integrity and performance at extreme temperatures helps prevent degradation under stressful conditions .
3. Enhanced Durability & Longevity:
- The 0 coating* contributes to the overall durability of stud bolts by reducing the effects of environmental wear. This means that parts will last longer and require less maintenance, leading to cost savings and reducing downtime in industrial operations .
4. Reduced Torque and Improved Tightening:
- The ln property of Xylan 1070 also contributes to reduced tightening torque, allowing for easier assembly. This results in less stress on the threads, minimizing the risk of thread damage and reducing the likelihood of over-tightening during installation .
Xylan 1070 Coated Stud Bolts Applications
- Marine: Used on fasteners exposed to seawater and salt, such as in shipbuilding and offshore platforms.
- Chemical Processing: Helps protect studs in environments with exposure to corrosive chemicals.
- Petrochemical and Oil & Gas: Offers enhanced protection in high-stress, high-pressure systems like pipelines and refineries.
- Automotive and Aerospace: Used in high-performance and durable applications, particularly where parts require protection from wear, corrosion, and high temperatures.
TYPE OF THREAD: UNC, 8 TPI
TYPE, NUT: HEAVY HEXOGONAL
DESIGN SPEC, NUT: ASME / ANSI B18.2.2 HEX NUTS
DESIGN SPEC, STUD BOLT: ASME / ANSI B18.2.1 STUD BOLT
DESIGN SPEC, THREAD: ANSI B1.1
THREAD CLASS SYMBOL, NUT: 2B
THREAD CLASS SYMBOL, STUD BOLT: 2A
Material: ASTM A193 Grade B7 stud bolt
Xylan coated A197 B7 stud Bolt A194 2H nuts specifications
ASTM A193 B7 Stud Bolt Chemical Composition %
| C | Mn | Si | P | S | Cr | Mo |
|---|---|---|---|---|---|---|
| 0.37-0.49 | 0.65-1.10 | 0.15-0.35 | 0.035 | 0.04 | 0.75-1.20 | 0.15-0.25 |
A193 B7 Stud Bolt Mechanical Properties
| Diameter | Tensile Strength | Yield Strength | Elongation | Reduction | Hardness |
|---|---|---|---|---|---|
| M64 or Below | 860 Mpa | 720 Mpa | 16 | 50 | 321 HB |
| M64 to M100 | 795 Mpa | 655 Mpa | 16 | 50 | 321 HB |
| M100 to M180 | 690 Mpa | 515 Mpa | 18 | 50 | 321 HB |
A194 2H Hex Nut Chemical Components %
| C | Mn | Ph | S | Si |
|---|---|---|---|---|
| 0.40 min | 1 | 0.04 | 0.05 | 0.4 |
A194 2H Hex Nut Mechanical Properties
| Size | TemperingTempFahrenheit | Proof LoadStress, ksi | Hardness |
|---|---|---|---|
| 1/4-1 1/2 | 850 | 175 | 248-327 |
| 1 1/2-4 | 850 | 175 | 212-327 |
| (A) StudsThreaded Rod / Stud A193 B7 |
XYLAN 1070 COATED STUD BOLTS
STUD BOLT, 2.1/2 IN DIA X 470MM LONG,
FULLY THREADED, C/W 2 HEAVY HEXAGON NUTS,
MATL STUDBOLTS ASTM A193 GRADE B7: NUTS ASTM A194 GRADE 2H,
BOTH ITEMS TO BE ZINC PLATING+ XYLAN 1070 COATED