Every standard and grade side by side — head marking, size range, and the headline strength values. This is the page to bookmark.
| Marking | Standard | Grade / Class | Size Range | Tensile, min | Yield, min |
|---|---|---|---|---|---|
| SAE J429 | Grade 2 | 1/4″–3/4″ | 74,000 psi | 57,000 psi | |
| SAE J429 | Grade 5 | 1/4″–1″ | 120,000 psi | 92,000 psi | |
| SAE J429 | Grade 8 | 1/4″–1-1/2″ | 150,000 psi | 130,000 psi | |
| ASTM A307 | Grade A | 1/4″–4″ | 60,000 psi min | — | |
| ASTM A307 | Grade B | 1/4″–4″ | 60,000–100,000 psi | — | |
| ASTM A449 | — | 1/4″–1″ | 120,000 psi | 92,000 psi | |
| ASTM A354 | Grade BC | 1/4″–2-1/2″ | 125,000 psi | 109,000 psi | |
| ASTM A354 | Grade BD | 1/4″–4″ | 150,000–173,000 psi | 130,000 psi |
Values shown are for the listed size range and in psi. Several grades step down at larger diameters (and A354 BD carries a tensile range) — see each standard's page for the full size-by-size breakdown. A307 Grades A and B have no specified yield.
The general-purpose carbon-steel option — the ASTM stand-in for a low-strength SAE Grade 2.
Same strength as Grade 5 (and A325), but across a wider diameter range and any configuration.
Alloy-steel high strength, equal to A490 — the ASTM route to Grade 8-class properties.