Material number K02700: A516 Grade 70
K02700 is the Unified Numbering System designation for A516 Grade 70, carbon steel plate for pressure vessels, moderate and lower temperature specified in ASTM A516.
Reading K02700 digit by digit
A UNS designation (ASTM E527 / SAE J1086) is a letter followed by five digits. The letter K marks the alloy family — here miscellaneous steels and ferrous alloys — and the five digits 02700 place the composition inside it, usually by carrying an older AISI or SAE number forward.
What a UNS number does not carry is the product form or the property level. K02700 therefore appears in several ASTM specifications — plate, bar, pipe, forging — each with its own mechanical requirements, and the number alone is not a complete purchase specification.
K02700 identity card
| Item | Value |
|---|---|
| UNS number (ASTM E527) | K02700 |
| Symbolic grade name | A516 Grade 70 |
| Steel group | K — miscellaneous steels and ferrous alloys |
| Sequential number in group | 02700 |
| Specified in | ASTM A516 |
| Steel family | Pressure vessel steel |
| Yield, first condition in the table | 260 MPa (Grade 70 — all thicknesses (as-rolled ≤ 40 mm; normalized > 40 mm)) |
| Tensile, same condition | 485–620 MPa |
| Cross-references held | 10 grades in 6 systems |
ASTM A516 Grade 70 / ASME SA-516-70 (UNS K02700): the standard US pressure-vessel plate — 260 MPa (38 ksi) yield, 485–620 MPa (70–90 ksi) tensile, normalized for toughness. Grades 55–70, composition by thickness, HIC/NACE options, P265GH/P295GH/Q345R equivalents.
Full data sheet for A516 Grade 70 → · Equivalent grades → · ASTM A516 →
UNS K — the neighbouring numbers
| UNS number | Grade | Type |
|---|---|---|
| K02303 | A572 Grade 50 | High-strength low-alloy (HSLA) columbium-vanadium structural steel |
| K02600 | A36 | Carbon structural steel |
| K03006 | A106 Grade B | Seamless carbon steel pipe for high-temperature service |
Same UNS letter, so the same alloy family. The digits generally carry an older AISI or SAE number.