| Customization: | Available |
|---|---|
| Material: | Alloy Steel |
| Grade: | A |
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As a domestic manufacturer, Lightning Bolt stocks a vast inventory of ASTM A193 Grade B7 Studs, including b7 threaded rod, b7 cap screws, and b7 hex bolts… and of course the ASTM A194 Grade 2H nuts that pair with them.
First off, for those who are unfamiliar with the term, ASTM stands for the American Society of Testing and Materials. It was originally founded in 1898 to form standards for the steel used for railroads. The scientists and engineers who make up this society put forth standards and specifications for a wide range of products and materials, including fasteners. ASTM A193 Grade B7 alloy steel fasteners are for high pressure or high temperature applications, and are very common for use with valves, flanges, and pressure vessels. Whether it be B7 heavy hex bolts, threaded rod, B7 studs, and much more.. Lightning Bolt has your ASTM A193 Grade B7 needs covered. We also have in house coating facility that is capable of manufacturing Xylan coated fasteners, such as PTFE studs "in house".
B7 fasteners are used across a wide range of industries, including the oil and gas and chemical industries. Because of their strength and commercial availability, B7 studs are very popular when flanging together pipe and valves. Our customers count on the reliability of our products, the competitiveness of our pricing, and the timeliness in which we can supply you.
A commonly asked question is "Which nuts should I use with B7 studs?"
For ASTM A193 Grade B7 studs and bolts, the nuts must conform with the ASTM A194 specification, unless specified otherwise by a project engineer. Thus, A194 Grade 2H nuts is what we most commonly see paired with B7 studs. When it comes to both specifications, Lightning Bolt has the capacity to service you whether you need a handful, or a truck full.
ASTM A193 B7
Technical info:
ASTM A193 Grade B7 Chromium Molybendum steel, normally AISI 4140, heat treated to 28-32 Rockwell Hardness, 125,000 PSI tensile strength, 105, 000 PSI yield. It will hold it's strength to 1000 degrees F.
While plain B7 material continues to be very popular, more and more, customers are choosing to go with "PTFE Coated A193 Grade B7 studs.
SIZE: 1/4" - 5", M6 -M100. And 4000mm Max length.
THREAD: ASME B1.1 , UNC, UNF, CLASS 2A
FINISHED: Plain, Zinc Plated(Clear/Blue/Yellow/Black), Black oxide, Nickel, Dacromet, H.D.G.
| 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
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