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العربية ASTM F1554 is a common U.S. standard for anchor bolts used in concrete foundations, steel columns, equipment bases, poles, and structural supports. The grade number refers to minimum yield strength in ksi.
That means Grade 36, Grade 55, and Grade 105 are not interchangeable.
ASTM F1554 Grade Comparison
Basic Strength Differences
| ASTM F1554 Grade | Minimum Yield Strength | Typical Tensile Range | Common Use |
|---|---|---|---|
| Grade 36 | 36 ksi | 58-80 ksi | Light to medium foundations, general construction |
| Grade 55 | 55 ksi | 75-95 ksi | Steel columns, poles, equipment bases |
| Grade 105 | 105 ksi | 125-150 ksi | Heavy-load anchoring and critical structural work |
For general anchor product planning, buyers can review anchor fasteners before finalizing drawings and specifications.
When to Use Each Grade
Grade 36
Grade 36 is the most economical option. It is often selected where high strength is not required and where field fabrication or welding may be involved.
Use it for standard foundations, light steel structures, and non-critical equipment anchoring.
Grade 55
Grade 55 is a practical middle ground. It offers higher strength than Grade 36 without jumping to the cost and control requirements of Grade 105.
One important note: if welding is required, specify the proper supplementary weldability requirement. Do not assume all Grade 55 anchor bolts are weldable.
Grade 105
Grade 105 is used where high load capacity is required. It needs tighter control of material, heat treatment, testing, and traceability.
For high-load projects, compare requirements with high-strength fasteners before approving substitutes.
What Buyers Should Specify
Grade Alone Is Not Enough
A complete ASTM F1554 inquiry should include:
- Grade: 36, 55, or 105.
- Diameter and total length.
- Thread length and thread series.
- Shape: straight, L-type, headed, or custom.
- Nut and washer requirements.
- Finish: plain, zinc plated, or hot-dip galvanized.
- Certificate and testing requirements.
- Drawing revision and quantity.
For carbon steel grade and finish options, see carbon steel fasteners. For outdoor foundations, compare coated fastener options.
Final Buying Advice
Do not select ASTM F1554 anchor bolts by diameter only. Grade controls strength. Shape controls embedment. Coating controls service life. Nut and washer matching controls installation reliability.
A clear specification prevents wrong-grade supply, failed inspection, and costly foundation delays.