Patriot Bolt machines ASTM A354 Grade BD and BC fasteners from certified alloy steel bar, quenched and tempered to the specification. A354 covers high-strength bolts, studs and rods up to 4 in diameter, in any configuration.
This page brings together the A354 fasteners we make, the property limits by grade and diameter, and how A354 compares with other carbon and alloy steel grades.
A354 BD / BC at a Glance
- Specification
- ASTM A354 Grade BD or BC
- Material
- Alloy steel, quenched and tempered
- Strength
- BD 150 ksi, BC 125 ksi min tensile (2-1/2 in and under)
- Matching nut
- A563 DH (BD), A563 C (plain BC)
- Products
- Stud bolts, threaded rod, heavy hex bolts, nuts
A354 BD / BC Fasteners We Machine
Choose a product to see its standards and options. Every order ships with mill test reports traceable to the heat.
A354 BD / BC Stud BoltsFull A354 page
A563 Heavy Hex NutsMatching nut
A354 Heavy Hex BoltsMade in A354A354 BD / BC Mechanical Properties
| Grade and diameter | Tensile, min | Yield (0.2%), min | Hardness |
|---|---|---|---|
| BC, 2-1/2 in and under | 125 ksi | 109 ksi | 26–36 HRC |
| BC, over 2-1/2 to 4 in | 115 ksi | 99 ksi | 22–33 HRC |
| BD, 2-1/2 in and under | 150 ksi | 130 ksi | 33–39 HRC |
| BD, over 2-1/2 to 4 in | 140 ksi | 115 ksi | 31–39 HRC |
Full chemistry is on the A354 BD / BC stud bolts page.
A354 vs. Other Carbon and Alloy Steel Grades
| Grade | Strength, min (tensile / yield) | Typical use |
|---|---|---|
| A354 BD | 150 / 130 ksi to 2-1/2 in | High-strength studs, rods and bolts to 4 in |
| A354 BC | 125 / 109 ksi to 2-1/2 in | Medium-high strength studs and rods to 4 in |
| A449 | 120 / 92 ksi to 1 in | General engineering; Grade 5 strength to 3 in |
| A193 B7 | 125 ksi tensile / 105 ksi yield | General flange bolting to about 800 °F |
Compare all grades in the Fastener Materials Matrix.
A354 BD / BC Fastener FAQ
What is the difference between A354 BD and BC?
BD is the stronger grade, with 150 ksi minimum tensile through 2-1/2 in compared with 125 ksi for BC.
Which A354 fasteners does Patriot Bolt make?
We machine A354 stud bolts, threaded rod, heavy hex bolts and matching nuts, as well as custom parts made to your drawing.
Which nuts go with A354?
A563 DH heavy hex nuts for BD and galvanized BC, and A563 C for plain BC. A194 2H nuts are commonly substituted for DH.
Do A354 fasteners come with certifications?
Yes. Patriot Bolt is ISO 9001:2015 certified, and every A354 order includes mill test reports traceable to the heat and a certificate of conformance to your purchase order.
Request a Quote
Send us the product, size, specification and quantity, or upload your drawing. Call (281) 581-0176 or request a quote.