The problem with ASTM A108, 1018CF is that there are no mechanical requirements and typically the test reports that accompany this steel reflect the chemistry only and not the strength of the steel. Test reports will need to accompany this material that reflect all four of the values listed below, and these values will need to meet the requirements of the F1554 grade 55 specification. If the test reports do not reflect any or all of the required mechanical properties, a sample of the same heat of material will need to be tested by a laboratory to determine if the 1018 material meets all of the criteria.
ASTM F1554 grade 55 has the following mechanical requirements for diameters 1/4″ – 2″:
- Minimum Yield: 55,000 psi
- Tensile Strength: 75,000 psi – 95,000 psi
- Minimum Elongation: 21%
- Minimum Reduction of Area: 30%
We have found two resources that give theoretical values one could expect 1018 cold finished steel to meet but they are very different. The steel warehouse sources and theoretical values are listed below:
| Steel Supplier | Yield, min, ksi | Tensile, ksi | Elong %, min | Reduction of Area |
|---|---|---|---|---|
| Earl M Jorgensen | 70 | 85 | 28% | 55% |
| Pacific Machinery and Tool Steel | 54 | 64 | 15% | Not Reported |
Based on theoretical values reported by Earl M Jorgensen, in theory 1018 CF should meet the requirements of F1554 grade 55, while the theoretical values reported by Pacific Machine and Tool Steel indicate that 1018 CF will not meet the mechanical requirements of F1554 grade 55. The only way to know with 100% certainty is to have the specific heat of steel tested for Yield Strength, Tensile Strength, Elongation, and Reduction of Area.
Our steel inventory includes material certified to meet all the requirements of grade 55. Most of this steel is supplied directly from North American steel mills and rolled specifically to meet the ASTM specifications.
Will 12.9 Grade Goes with A55 Grade ?
@Sibin- Grade 12.9 is a super high strength, heat treated alloy steel fastener grade, whereas F1554g55 is a low carbon, weldable anchor bolt grade. The two are very dissimilar from each other and are not normally used together.
Will grade 55 meet the requirements for A26 cold rolled steel
@Steve- We are not familiar with A26 steel, so we are unable to compare. If you meant A36, that is a common steel, but it will not likely meet all the mechanical and ductility requirements for F1554g55. You can consult the steel MTR and cross reference to be sure.
what is appropriate length of anchor bolt for 1 1/8.
@Jonathan- We can manufacture 1-1/8″ anchor bolts to any length. Your application is what will dictate the appropriate length.
Steel indicate that 1018 CF will not meet the mechanical requirements of F1554 grade 55!!!!
@Rosina – You are correct, most times the mechanicals properties of 1018 CF will not line up with the requirements of F1554G55.