Overview of Bolt Specifications
Most common, non-stainless bolt specifications.
Overview of Bolt Specifications
Most common, non-stainless bolt specifications.
STANDARD STRENGTH FASTENER SPECIFICATIONS
Items in each category have very similar strength characteristics.
ASTM F1554: Grade 36
Standard Specification for Anchor Bolts.
There are three grades defined in the F1554 specification.
MECHANICAL PROPERTIES |
||
|---|---|---|
| Property | Size | Value |
| Tensile, ksi | 1/2" - 4" | 58 - 80 |
| Yield, ksi min | 1/2" - 4" | 36 |
| Elongation % min | 1/2" - 4" | 23 |
| Red. of Area % min | 1/2" - 4" | 40 |
CHEMICAL PROPERTIES |
|||
|---|---|---|---|
| Element | |||
| Sizes up to 3/4" | Sizes over 3/4" to 1-1/2" | Sizes over 1-1/2" to 4" | |
| Carbon, max | 0.26% | 0.27% | 0.28% |
| Manganese | 0.60 - 0.90% | 0.60 - 0.90% | |
| Phosphorus, max | 0.04% | 0.04% | 0.04% |
| Sulfur, max | 0.05% | 0.05% | 0.05% |
| Copper, min (when specified) | 0.20% | 0.20% | 0.20% |
ASTM A307: Grade A
Standard specification for carbon steel bolts and studs, 60,000 tensile strength.
There are two grades defined in the A307 specification.
MECHANICAL PROPERTIES |
|
|---|---|
| Property | Value |
| Tensile, ksi | 60 min |
| Yield, ksi min | - |
| Elongation % min | 18 |
CHEMICAL PROPERTIES |
|
|---|---|
| Element | |
| % | |
| Carbon, max | 0.29% |
| Manganese, max | 1.20% |
| Phosphorus, max | 0.04% |
| Sulfur, max | 0.15% |
ASTM A307: Grade B
Standard specification for carbon steel bolts and studs, 60,000 tensile strength.
There are two grades defined in the A307 specification.
MECHANICAL PROPERTIES |
|
|---|---|
| Property | Value |
| Tensile, ksi | 60 - 100 |
| Yield, ksi min | 36 |
| Elongation % min | 23 |
CHEMICAL PROPERTIES |
|
|---|---|
| Element | % |
| Carbon, max | 0.29% |
| Manganese, max | 1.20% |
| Phosphorus, max | 0.04% |
| Sulfur, max | 0.05% |
SAE J429: Grade 2
Commonly known simply as Grade 2.
MECHANICAL PROPERTIES |
||
|---|---|---|
| Property | Size | Value |
| Tensile, psi min | 1/4" - 3/4" | 74,000 |
| over 3/4" - 1-1/2" | 60,000 | |
| Yield, psi min | 1/4" - 3/4" | 57,000 |
| over 3/4" - 1-1/2" | 36,000 | |
| Elongation % min | 1/4" -3/4" | 18 |
| over 3/4" - 1-1/2" | 18 | |
| Red. of Area % min | 1/4" - 3/4" | 35 |
| over 3/4" - 1-1/2" | 35 |
CHEMICAL PROPERTIES |
|
|---|---|
| Element | % |
| Carbon | 0.15 - 0.55% |
| Phosphorus, max | 0.03% |
| Sulfur, max | 0.05% |
BETWEEN STANDARD & MEDIUM STRENGTH FASTENER SPECIFICATIONS
ASTM F1554: Grade 55
Standard Specification for Anchor Bolts.
There are three grades defined in the F1554 specification.
This is grade is slightly higher strength than F1554 Grade 36, but slightly more than half the strength of F1554 105.
MECHANICAL PROPERTIES |
||||
|---|---|---|---|---|
| Size | Tensile, ksi | Yield, ksi min | Elong. % min | RA % min |
| 1/2" - 2" | 75 - 95 | 55 | 21 | 30 |
| 2-1/4" - 2-1/2" | 75 - 95 | 55 | 21 | 22 |
| 2-3/4"- 3" | 75 - 95 | 55 | 21 | 20 |
| 3-1/4" - 4" | 75 - 95 | 55 | 21 | 18 |
CHEMICAL PROPERTIES |
|
|---|---|
| Element | % |
| Phosphorus, max | 0.04% |
| Sulfur, max | 0.05% |
| Copper, min (when specified) | 0.20% |
MEDIUM STRENGTH FASTENER SPECIFICATIONS
Items in each category have very similar strength characteristics.
ASTM F1554: Grade 105
Standard Specification for Anchor Bolts
There are three grades defined in the F1554 specification.
MECHANICAL PROPERTIES |
||
|---|---|---|
| Property | Size | Value |
| Tensile, ksi | 1/2" - 3" | 125 - 150 |
| Yield, ksi min | 1/2" - 3" | 105 |
| Elongation % min | 1/2" - 3" | 15 |
| Red. of Area % min | 1/2" - 3" | 45 |
CHEMICAL PROPERTIES |
|
|---|---|
| Element | % |
| Phosphorus, max | 0.04% |
| Sulfur, max | 0.05% |
| Copper, min (when specified) | 0.20% |
ASTM A325: TYPE 1
Always heavy head. Shorter thread lengths than other bolts.
Can only be made in 1/2" to 1-1/2" diameter bolts, no studs.
CHEMICAL PROPERTIES |
||||
|---|---|---|---|---|
| Element | Carbon Steel | Carbon Boron Steel | Alloy Steel | Alloy Boron Steel |
| Carbon | 0.3 - 0.52% | 0.3 - 0.52% | 0.3 - 0.52% | 0.3 - 0.52% |
| Manganese, min | 0.6% | 0.6% | 0.6% | 0.6% |
| Phosphorus, max | 0.04% | 0.04% | 0.35% | 0.35% |
| Sulfur, max | 0.05% | 0.05% | 0.04% | 0.04% |
| Silicon | 0.15 - 0.3% | 0.10 - 0.3% | 0.15 - 0.35% | 0.15 - 0.35% |
| Boron | 0.0005 - 0.003% | 0.0005 - 0.003% | ||
| Alloying Elements | see note | see note |
MECHANICAL PROPERTIES |
||
|---|---|---|
| Property | Size | Value |
| Tensile, ksi min | 1/2" - 1" | 120 |
| 1-1/8" - 1-1/2" | 105 | |
| Yield, ksi min | 1/2" - 1" | 92 |
| 1-1/8" - 1-1/2" | 81 | |
| Elongation % min | 1/2" -1" | 14 |
| 1-1/8" - 1-1/2" | 14 | |
| Red. of Area % min | 1/2" - 1" | 35 |
| 1-1/8" - 1-1/2" | 35 |
NOTE
Steel, as defined by the American Iron and Steel Institute, shall be considered to be alloy when the max range given for the content of alloying elements exceeds one of more of the following limits:
Manganese 1.65%
Silicon 0.6%
Copper 0.6%
Or in which a definite range or minimum quantity of any of the following elements is specified or required within the limits of the recognized field of constructional alloy steels.
Nickel
Titanium
Tungsten
Vanadium
Zirconium
Aluminum
Chromium (up to 3.99%)
Cobalt
Columbium
Molybdenum
Or any other alloying elements added to obtain a desired alloying effect.
ASTM A449: Type 1
Headed bolts, headless studs or rods in diameters ranging from 1/4" through 3" inclusive.
CHEMICAL PROPERTIES |
||||
|---|---|---|---|---|
| Element | Carbon Steel | Carbon Boron Steel | Alloy Steel | Alloy Boron Steel |
| Carbon | 0.3 - 0.52% | 0.3 - 0.52% | 0.3 - 0.52% | 0.3 - 0.52% |
| Manganese, min | 0.6% | 0.6% | 0.6% | 0.6% |
| Phosphorus, max | 0.04% | 0.04% | 0.35% | 0.35% |
| Sulfur, max | 0.05% | 0.05% | 0.04% | 0.04% |
| Silicon | 0.15 - 0.3% | 0.10 - 0.3% | 0.15 - 0.35% | 0.15 - 0.35% |
| Boron | 0.0005 - 0.003% | 0.0005 - 0.003% | ||
| Alloying Elements | see note | see note |
MECHANICAL PROPERTIES |
||
|---|---|---|
| Property | ">Size | Value |
| Tensile, ksi min | 1/4" - 1" | 120 |
| 1-1/8" - 1-1/2" | 105 | |
| 1-5/8" - 3" | 90 | |
| Yield, ksi min | 1/4" - 1" | 92 |
| 1-1/8" - 1-1/2" | 81 | |
| 1-5/8" - 3" | 58 | |
| Elongation % min | 1/4" -1" | 14 |
| 1-1/8" - 1-1/2" | 14 | |
| 1-5/8" - 3" | 14 | |
| Red. of Area % min | 1/4" - 1" | 35 |
| 1-1/8" - 1-1/2" | 35 | |
| 1-5/8" - 3" | 35 |
NOTE
Steel, as defined by the American Iron and Steel Institute, shall be considered to be alloy when the max range given for the content of alloying elements exceeds one of more of the following limits:
Manganese 1.65%
Silicon 0.6%
Copper 0.6%
Or in which a definite range or minimum quantity of any of the following elements is specified or required within the limits of the recognized field of constructional alloy steels.
Nickel
Titanium
Tungsten
Vanadium
Zirconium
Aluminum
Chromium (up to 3.99%)
Cobalt
Columbium
Molybdenum
Or any other alloying elements added to obtain a desired alloying effect.
ASTM A354: BC
Quenched and tempered alloy steel headed bolts, headless studs or rods 4" and under in diameter.
MECHANICAL PROPERTIES |
||
|---|---|---|
| Property | Size | Value |
| Tensile, ksi min | 1/4" - 2-1/2" | 125 |
| 2-5/8" - 4" | 115 | |
| Yield, ksi min | 1/4" - 2-1/2" | 109 |
| 2-5/8" - 4" | 99 | |
| Elongation % min | 1/4" - 2-1/2" | 16 |
| 2-5/8" - 4" | 16 | |
| Red. of Area % min | 1/4" - 2-1/2" | 50 |
| 2-5/8" - 4" | 45 |
CHEMICAL PROPERTIES |
||
|---|---|---|
| Element | Sizes 1/4" to 1-1/2" | Sizes above 1-1/2" |
| Carbon | 0.3 - 0.53% | 0.3 - 0.53% |
| Phosphorus, max | 0.35% | 0.35% |
| Sulfur, max | 0.04% | 0.05% |
ASTM A193: B7
There are a great deal of grades contained in the A193 specification.
They very widely in strength and other attributes, however B7 is by far the most common grade. Intended for use in high temperature or high pressure applications, B7 has become the go to specification for high-strength studs and threaded rods across all industry.
MECHANICAL PROPERTIES |
||
|---|---|---|
| Property | Size | Value |
| Tensile, ksi min | up to 2-1/2" | 125 |
| 2-5/8" - 4" | 115 | |
| 4-1/8" - 7" | 100 | |
| Yield, ksi min | up to 2-1/2" | 105 |
| 2-5/8" - 4" | 95 | |
| 4-1/8" - 7" | 75 | |
| Elongation % min | up to 2-1/2" | 16 |
| 2-5/8" - 4" | 16 | |
| 4-1/8" - 7" | 18 | |
| Red. of Area % min | up to 2-1/2" | 50 |
| 2-5/8" - 4" | 50 | |
| 4-1/8" - 7" | 50 |
CHEMICAL PROPERTIES |
|
|---|---|
| Element | % |
| Carbon | 0.37 - 0.49% |
| Manganese | 0.65 - 1.10% |
| Phosphorus, max | 0.035% |
| Sulfur, max | 0.04% |
| Silicon | 0.15 - 0.35% |
| Chromium | 0.75 - 1.2% |
SAE J429: Grade 5
Commonly known simply as Grade 5.
Marked with three radial lines on headed bolts.
MECHANICAL PROPERTIES |
||
|---|---|---|
| Property | Size | Value |
| Tensile, psi min | 1/4" - 1" | 120,000 |
| over 1" - 1-1/2" | 105,000 | |
| Yield, psi min | 1/4" - 1" | 92,000 |
| over 1" - 1-1/2" | 81,000 | |
| Elongation % min | 1/4" -1" | 14 |
| over 1" - 1-1/2" | 14 | |
| Red. of Area % min | 1/4" - 1" | 35 |
| over 1" - 1-1/2" | 35 |
CHEMICAL PROPERTIES |
|
|---|---|
| Element | % |
| Carbon | 0.28 - 0.55% |
| Phosphorus, max | 0.03% |
| Sulfur, max | 0.05% |
HIGH STRENGTH FASTENER SPECIFICATIONS
Items in each category have very similar strength characteristics.
ASTM A354: BD
Quenched and tempered alloy steel headed bolts, headless studs or rods 4" and under in diameter.
MECHANICAL PROPERTIES |
||
|---|---|---|
| Property | Size | Value |
| Tensile, ksi min | 1/4" - 2-1/2" | 150 |
| 2-5/8" - 4" | 140 | |
| Yield, ksi min | 1/4" - 2-1/2" | 130 |
| 2-5/8" - 4" | 115 | |
| Elongation % min | 1/4" - 2-1/2" | 14 |
| 2-5/8" - 4" | 14 | |
| Red. of Area % min | 1/4" - 2-1/2" | 40 |
| 2-5/8" - 4" | 40 |
CHEMICAL PROPERTIES |
||
|---|---|---|
| Element | Sizes 1/4" to 1-1/2" | Sizes above 1-1/2" |
| Carbon | 0.3 - 0.53% | 0.3 - 0.53% |
| Phosphorus, max | 0.035% | 0.035% |
| Sulfur, max | 0.04% | 0.05% |
ASTM A490: Type 1
Always heavy head. Shorter thread lengths than other bolts.
Can only be made in 1/2" to 1-1/2" diameter bolts, no studs.
MECHANICAL PROPERTIES |
||
|---|---|---|
| Property | Size | Value |
| Tensile, ksi | 1/2" - 1-1/2" | 150 - 173 |
| Yield, ksi | 1/2" - 1-1/2" | 130 |
| Elongation % min | 1/2" - 1-1/2" | 14 |
| Red. of Area % min | 1/2" - 1-1/2" | 40 |
CHEMICAL PROPERTIES |
||
|---|---|---|
| Element | Sizes 1/2" to 1-3/8" | Size 1-1/2" |
| Carbon, max | 0.3 - 0.48%% | 0.35 - 0.53% |
| Phosphorus, max | 0.04% | 0.04% |
| Sulfur, max | 0.04% | 0.04% |
SAE J429: Grade 8
Commonly known simply as Grade 8.
Marked with six radial lines on headed bolts.
MECHANICAL PROPERTIES |
||
|---|---|---|
| Property | Size | Value |
| Tensile, psi min | 1/4" - 1-1/2" | 150,000 |
| Yield, psi min | 1/4" - 1-1/2" | 130,000 |
| Elongation % min | 1/4" - 1-1/2" | 12 |
| Red. of Area % min | 1/4" - 1-1/2" | 35 |
CHEMICAL PROPERTIES |
|
|---|---|
| Element | % |
| Carbon | 0.28 - 0.55% |
| Phosphorus, max | 0.03% |
| Sulfur, max | 0.05% |