A193 B7 Hex Cap Screws PTFE

• Material: Stainless Steel
• Grade: A
• Certification: ISO, CE
• Customized: Customized
• Steel Grade: 3.6\4.6\4.8\5.6\6.8\8.8\9.8\10.9\12.9
• Transport Package: Playwood Box, Wooden Case
• Trademark: C&N
• Origin: China
• Production Capacity: 100tons/Month

Product Description

ASTM A193 Grade B7 Studs, Cap Screws, and Hex Bolts

ASTM A193 B7 Stud Bolt with Zinc Nickel Plating and PTFE Coating

C&N  HONGCHENG  offers high quality of ESPARRAGOS STUD BOLT A193 Grado  B7 w/2 NUTS A194 2H,

ASTM A193 B7 Stud Bolt with Zinc Nickel Plating and PTFE Coating

Known throughout the industry for its amazing resistance to corrosion, one of our PTFE coating is a proprietary Flurokote#1 blend that offers superior characteristics for maximizing the life of coated fasteners.  PTFE coating are very popular on specifically on B7 studs PTFE and include a tensile strength of up to 4,000psi & an operating pressure up to 100,000psi.

Unlike hot dip galvanized fasteners, the absence of oxides promise a safe and easy removal of "frozen nuts"when using coated fasteners from Lightning Bolt.  PTFE hex bolts are available in a very wide range of sizes and in many different lengths.  The grade B7 fasteners are governed by the ASTM A-193 specification, but is a hardened alloy similar in strength to the SAE-J429 grade 5.  

 

A193 MECHANICAL PROPERTIES
Grade	Size	Tensile, ksi, min	Yield, ksi, min	Elong. % min	RA min	HBW, max	HRC, max
B7	up to 2-1/2"	125	105	16	50	321	35
	2-5/8" - 4"	115	95	16	50
	4-1/8" - 7"	100	75	18	50
B8 Class 1	all	75	30	30	50	223	35
B8 Class 2	up to 3/4"	125	100	12	35	321	35
	7/8" - 1"	115	80	15	35
	1-1/8" - 1-1/4"	105	65	20	35
	1-3/8" - 1-1/2"	100	50	28	45
B8M Class 1	all	75	30	30	50	223	96
B8M Class 2	up to 3/4"	110	95	15	45	321	35
	7/8" - 1"	100	80	20	45
	1-1/8" - 1-1/4"	95	65	25	45
	1-3/8" - 1-1/2"	90	50	30	45
B16	under 2-1/2"	125	105	18	50	321	35
	over 2-1/2" - 4"	110	95	17	45
	over 4" - 8"	100	85	16	45

 

A193 CHEMICAL PROPERTIES
Element	Grade B7	Grade B8	Grade B8M	Grade B16
Carbon	0.37 - 0.49%	0.08% max	0.08% max	0.36 - 0.47%
Manganese	0.65 - 1.1%	2.0% max	2.0% max	0.45 - 0.7%
Phosphorus, max	0.04%	0.05%	0.05%	0.04%
Sulfur, max	0.04%	0.03%	0.03%	0.04%
Silicon	0.15 - 0.35%	1.0% max	1.0% max	0.15 - 0.35%
Chromium	0.75 - 1.2%	18.0 - 20.0%	16.0 - 18.0%	0.8 - 1.15%
Nickel		8.0 - 11.0%	10.0 - 14.0%
Molybdenum	0.15 - 0.25%		2.0 - 3.0%	0.5 - 0.65%
Vanadium				0.25 - 0.35%
Aluminum, max				0.02%

 

A193 RECOMMENDED HARDWARE
Grade	Nut	Washer
B7	A194 Grade 2H	F436
B8 Class 1	A194 Grade 8	304 Stainless
B8 Class 2	A194 Grade 8	304 Stainless
B8M Class 1	A194 Grade 8M	316 Stainless
B8M Class 2	A194 Grade 8M	316 Stainless
B16	A194 Grade 7	F436

FAQ'S
1.What is Xylan?
Xylan is a family of fluoropolymer coatings designed by Whitford to provide corrosion protection, lubrication, wear resistance and non-stick properties in a variety industries and applications.  it have below benefits
Anti-Rust. In a ASTM B-117 Salt Spray test the coating remains resistant up to 3900 hours before red rust occurs.
Sustainability. As we are working towards a circular economy, PTFE coated fasteners are more sustainable then regular bolts due to their longer durability.
Lower maintenance costs. Longer durability of bolts does not only result in more sustainability but also lower maintenance costs.
Low torque friction coefficient. Due to the TEF-LON top layer, torque friction is low.
Added value. Using colored bolts into the colored frame work, valve, flange or heat exchanger gives your product extra added value.

3 How do you apply Xylan Coating?
 STEP ONE: Applying a base-coat such as Phosphate, Zinc, Zinc-Nickel, Hot Dip Galvanized or Xylar 1. The base coat has an average thickness of 10-15µ (except for HDG).
STEP TWO: Glass-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.
STEP FOUR: Heat treatment of the coated fasteners is performed.
4.Is Xylan the same as Te-flon?
No. Xylan and Te-flon are both brands of PTFE (Polytetrafluoroethylene) coatings. Although some Xylan and Te-flon products may have similar properties, it is important not to assume they will do the same job as there are variations of each product which are suitable for different applications and environments.

5.Is Xylan suitable for fasteners?
Yes. Amongst the Xylan range are a series of fastener-class coating systems designed to improve the performance and longevity of all types, sizes and grades of fasteners through its excellent corrosion resistant and low-friction properties. Xylan can be applied via dip-spin and spray methods, meaning it is suitable for small screws right through to large stud bolts.

6.What is Xylan Blue?
Xylan actually comes in a wide range of colours but is often referred to as "Xylan Blue" or "PTFE Blue" in reference to coating B7 Stud Bolts and Nuts for the Petrochemical industry. Generally, the product required will be Xylan 1424 or Xylan 1070 however its always best to clarify with the end user or consult technical advice direct from Whitford or your preferred applicator to confirm.

7.What are the addtional coating type you can  supply?
Zinc + Fluorocarbon / PTFE
Cadmium + Fluorocarbon /PTFE
Zinc Nickel + Fluorocarbon /PTFE
Zinc Plating + Xylan 1424 Blue
Xylar 2 + Xylan 1070 Blue
Xylar 2 + xylar 101 coated stud bolt

8.How to order the fluorocarbon coated stud bolts?
Example#1,
Stud Bolt 5/8″x80mm + 2 Heavy Hex Nuts ASME B18.2.1/B18.2.2/B1.1  Cl.2A/2B ASTM A 193 Gr.B7 - A 194 Gr.2H Fluorocarbon Coated blue color
Stud Bolts B7 c/ w 2Nuts 2H Fluoro Carbon Coated ASTM A 193 Gr.B7 - A194 - Gr.2H
Stud Bolts B7 c/ w 2Nuts 2H Black ASTM A 193 Gr.B7 - A194 - Gr.2H