A656 HSLA Structural Quality Steel
50, 60, 70, 80 Strength Grades
A656 HSLA structural quality steel meets standard specifications for high-strength low-alloy, hot-rolled structural steel & features improved formability. This specification covers three types and four strength grades (50, 60, 70 & 80) of high-strength low-alloy, hot rolled structural steel plate for use in truck frames, brackets, crane booms, rail cars, and similar applications. Steels that conform to this specification offer improved formability. These steels are normally furnished in the as-rolled condition.
Chemical Requirements:
| Grade | Type 3 | Type 7 | Type 8 |
|---|---|---|---|
| Carbon | .18 max | .18 max | .18 max |
| Manganese | 1.65 max | 1.65 max | 1.65 max |
| Phosphorous | .025 max | .025 max | .025 max |
| Sulfur | .035 max | .035 max | .035 max |
| Silicon | .60 max | .60 max | .60 max |
| Vanadium | .08 max | .15 max | .15 max |
| Nitrogen | .020 max | .020 max | .020 max |
| Columbium | .008 - .10 | .10 max | .10 max |
| Titanium | .15 max |
Mechanical Requirements:
- Grade 50 – 50,000psi yield strength, 60,000psi tensile strength, 20% elongation in 8” test, 23% elongation in 2” test. Maximum thickness is 2”.
- Grade 60 – 60,000psi yield strength, 70,000psi tensile strength, 17% elongation in 8” test, 20% elongation in 2” test. Maximum thickness is 1.50”.
- Grade 70 – 70,000psi yield strength, 80,000psi tensile strength, 14% elongation in 8’ test, 17% elongation in 2” test. Maximum thickness is 1”.
- Grade 80 – 80,000psi yield strength, 90,000psi tensile strength, 12% elongation in 8” test, 15% elongation in 2” test. Maximum thickness is .75”.
Note – Mechanical requirements are minimums unless there is a range listed.
For additional information on A656 please contact a Leeco Steel representative.
