- Technology Driven, High Performance Fasteners
- Sonipat, Haryana India
- sales@bigboltnut.com
ASTM A 449
ASTM A449 covers headed bolts, rods, and anchor bolts in diameters ranging from 1/4″ through 3″ inclusive. It is a medium strength bolt manufactured from a medium
carbon or alloy steel that develops its mechanical values through a heat treating process. It is intended for general engineering applications.
ASTM A449 is virtually identical in chemistry and strength to ASTM A325 and SAE J429 grade 5. However, A449 is more flexible in the sense that it covers a larger diameter range and is not restricted by a specific configuration.
ASTM A449 Grades
| Type 1 |  |
Plain carbon steel, carbon boron steel, alloy steel, or alloy boron steel. |
| Type 2 | |
Withdrawn 2003 |
| Type 3 | |
Weathering steel. |
ASTM A449 Chemical properties
|
Type 1 Bolts |
||||
|
Element |
Carbon Steel |
Carbon Boron Steel |
Alloy Steel |
Alloy Boron Steel |
|
Carbon |
0.30 - 0.52% |
0.30 - 0.52% |
0.30 - 0.52% |
0.30 - 0.52% |
|
Manganese, min |
0.60% |
0.60% |
0.60% |
0.60% |
|
Phosphorus, max |
0.040% |
0.040% |
0.035% |
0.035% |
|
Sulfur, max |
0.050% |
0.050% |
0.040% |
0.040% |
|
Silicon |
0.15-0.30% |
0.10 - 0.30% |
0.15 - 0.35% |
0.15 - 0.35% |
|
Boron |
- |
0.0005 - 0.003% |
- |
0.0005 - 0.003% |
|
Type 3 Bolts, Class * |
||||||
|
Element |
A |
B |
C |
D |
E |
F |
|
Carbon |
0.33 - 0.40% |
0.38 - 0.48% |
0.15 - 0.25% |
0.15 - 0.25% |
0.20 - 0.25% |
0.20 - 0.25% |
|
Manganese |
0.90 - 1.20% |
0.70 - 0.90% |
0.80 - 1.35% |
0.40 - 1.20% |
0.60 - 1.00% |
0.90 - 1.20% |
|
Phosphorus |
0.035% max |
0.06 - 0.12% |
0.035% max |
0.035% max |
0.035% |
0.035% |
|
Sulfur, max |
0.040% |
0.040% |
0.040% |
0.040% |
0.040% |
0.040% |
|
Silicon |
0.15 - 0.35% |
0.30 - 0.50% |
0.15 - 0.35% |
0.25 - 0.50% |
0.15 - 0.35% |
0.15 - 0.35% |
|
Copper |
0.25 - 0.45% |
0.20 - 0.40% |
0.20 - 0.50% |
0.30 - 0.50% |
0.30 - 0.60% |
0.20 - 0.40% |
|
Nickel |
0.25 - 0.45% |
0.50 - 0.80% |
0.25 - 0.50% |
0.50 - 0.80% |
0.30 - 0.60% |
0.20 - 0.40% |
|
Chromium |
0.45 - 0.65% |
0.50 - 0.75% |
0.30 - 0.50% |
0.50 - 1.00% |
0.60 - 0.90% |
0.45 - 0.65% |
|
Vanadium |
- |
- |
0.020% min |
- |
- |
- |
|
Molybdenum |
- |
0.06% max |
- |
0.10% max |
- |
- |
|
Titanium |
- |
- |
- |
0.05% max |
- |
- |
ASTM A449 Mechanical properties
|
Size |
Tensile, ksi |
Yield, ksi |
Elong. %, min |
RA %, min |
|
1⁄4- 1 |
120 min |
92 min |
14 |
35 |
|
11⁄8- 11⁄2 |
105 min |
81 min |
14 |
35 |
|
15⁄8- 3 |
90 min |
58 min |
14 |
35 |
ASTM A449 Marking
|
Grade |
Marking Details |
|
A449 |
Bolts are marked or stamped with “A449” along with RFL logo or as per customer need. |