Patriot Bolt machines ASTM A449 fasteners from medium-carbon or alloy steel bar, quenched and tempered to the specification. A449 is a medium-strength grade, similar to SAE J429 Grade 5, that covers bolts, studs and rods from 1/4 to 3 in.
This page brings together the A449 fasteners we make, the property limits by diameter, and how A449 compares with other carbon and alloy steel grades.
A449 at a Glance
- Specification
- ASTM A449 Type 1
- Material
- Medium-carbon or alloy steel, quenched and tempered
- Strength
- 120 ksi min tensile, 92 ksi min yield (1 in and under)
- Matching nut
- A563 (DH for galvanized)
- Products
- Stud bolts, threaded rod, heavy hex bolts, nuts
A449 Fasteners We Machine
Choose a product to see its standards and options. Every order ships with mill test reports traceable to the heat.
A449 Stud BoltsFull A449 page
A563 Heavy Hex NutsMatching nut
A449 Heavy Hex BoltsMade in A449A449 Mechanical Properties
| Diameter | Tensile, min | Yield (0.2%), min | Elongation, min |
|---|---|---|---|
| 1/4–1 in | 120 ksi | 92 ksi | 14% |
| 1-1/8–1-1/2 in | 105 ksi | 81 ksi | 14% |
| 1-5/8–3 in | 90 ksi | 58 ksi | 14% |
Full chemistry is on the A449 stud bolts page.
A449 vs. Other Carbon and Alloy Steel Grades
| Grade | Strength, min (tensile / yield) | Typical use |
|---|---|---|
| A449 | 120 / 92 ksi to 1 in | General engineering; Grade 5 strength to 3 in |
| SAE J429 Grade 5 | 120 / 92 ksi to 1 in | Machinery cap screws and bolts to 1-1/2 in |
| A354 BC | 125 / 109 ksi to 2-1/2 in | Medium-high strength studs and rods to 4 in |
| A307 Gr A / B | 60 ksi tensile | Low-strength general bolting; Grade B for cast-iron flanges |
Compare all grades in the Fastener Materials Matrix.
A449 Fastener FAQ
How does A449 compare with Grade 5?
Chemistry and strength are nearly the same through 1-1/2 in. A449 also covers sizes up to 3 in.
Which A449 fasteners does Patriot Bolt make?
We machine A449 stud bolts, threaded rod, heavy hex bolts and matching nuts, as well as custom parts made to your drawing.
Which nuts go with A449?
A563 nuts. Use A563 Grade DH heavy hex nuts on galvanized A449.
Do A449 fasteners come with certifications?
Yes. Patriot Bolt is ISO 9001:2015 certified, and every A449 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.