ASTM A633 HSLA Steel
This material is particularly suited for service at low ambient temperatures of -50oF [-45oC] and higher where notch toughness better than that expected in as-rolled material of a comparable strength level is desired.
Four grades, designated Grades A, C, D, and E (essentially former Specification A633 without a grade designation) are covered by this specification.
Grade A provides a minimum yield point of 42 ksi [290 MPa] in thicknesses through 4 in. [100 mm], inclusive.
Grades C and D provide a minimum yield point of 50 ksi [345 MPa] in thicknesses up to 2.50 in. [65 mm], inclusive and 46.0 ksi [315 MPa] in thicknesses over 2.50 in. to 4.0 in. [65 to 100 mm], inclusive.
Grade E provides a minimum yield point of 60 ksi [415 MPa] in thicknesses up to 4.0 in. [100 mm], inclusive and 55 ksi [380 MPa] in thicknesses over 4 in. to 6 in. [100 to 150 mm], inclusive.
What is the yield strength of ASTM A633 Grade A?
290 MPa
A633 Grade A has a minimum yield strength of 42 ksi [290 MPa]
Chemical Requirements
*Elements represented in percentage
Where "-" appears in this table, there is no requirement
| Element | Grade A, % | Grade C, % | Grade D, % | Grade E, %A |
|---|---|---|---|---|
| Carbon, max | 0.18 | 0.20 | 0.20 | 0.22 |
| Manganese: | ||||
| 1½ in. [40 mm] and under in thickness | 1.00-1.35 | 1.15-1.50B | 0.70-1.35 | 1.15-1.50 |
| Over 1½ in. to 4 in. [40 to 100 mm], incl | 1.00-1.35 | 1.15-1.50B | 1.00-1.60 | 1.15-1.50 |
| Over 4 in. to 6 in. [100 to 150 mm], incl | C | C | C | 1.15-1.50 |
| Phosphorus, max | 0.030 | 0.030 | 0.030 | 0.030 |
| Sulfur, max | 0.030 | 0.030 | 0.030 | 0.030 |
| Silicon | 0.15-0.50 | 0.15-0.50 | 0.15-0.50 | 0.15-0.50 |
| Vanadium | – | – | – | 0.04-0.11 |
| Columbium | 0.05 max | 0.01-0.05 | – | D |
| Nitrogen, max | – | – | – | 0.03 |
| Copper, max | – | – | 0.35 | – |
| Nickel, max | – | – | 0.25 | – |
| Chromium, max | – | – | 0.25 | – |
| Molybdenum, max | – | – | 0.08 | – |
Tensile Requirements
| Grade A | Grades C and D | Grade E | |
|---|---|---|---|
| Yield point, min, ksi [MPa]: | |||
| 2.5 in. [65 mm] and under | 42 [290] | 50 [345] | 60 [415] |
| Over 2.5 in. to 4 in. [65 to 100 mm], incl | 42 [290] | 46 [315] | 60 [415] |
| Over 4 in. to 6 in. [100 to 150 mm], incl | B | B | 55 [380] |
| Tensile strength, ksi [MPa]: | |||
| 2.5 in. [65 mm] and under | 63 to 83 [430 to 570] | 70 to 90 [485 to 620] | 80 to 100 [550 to 690] |
| Over 2.5 in. to 4 in. [65 to 100 mm], incl | 63 to 83 [430 to 570] | 65 to 85 [450 to 590] | 80 to 100 [550 to 690] |
| Over 4 in. to 6 in. [100 to 150 mm], incl | B | B | 75 to 95 [515 to 655] |
| Elongation in 8 in. [200 mm], min, %C | 18 | 18 | 18 |
| Elongation in 2 in. [50 mm], min, %C | 23 | 23 | 23 |
