Material number K02600: A36
K02600 is the Unified Numbering System designation for A36, carbon structural steel specified in ASTM A36.
Reading K02600 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 02600 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. K02600 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.
K02600 identity card
| Item | Value |
|---|---|
| UNS number (ASTM E527) | K02600 |
| Symbolic grade name | A36 |
| Steel group | K — miscellaneous steels and ferrous alloys |
| Sequential number in group | 02600 |
| Specified in | ASTM A36 |
| Steel family | Structural steel |
| Yield, first condition in the table | 250 MPa (Plate, shapes, bar ≤ 200 mm (8 in)) |
| Tensile, same condition | 400–550 MPa |
| Cross-references held | 10 grades in 8 systems |
ASTM A36 steel (UNS K02600): the standard US structural carbon steel — 250 MPa (36 ksi) minimum yield, 400–550 MPa (58–80 ksi) tensile. Composition by product, thickness effects, A36 vs A572 / 1018 / S235JR, and SS400/Q235 equivalents.
Full data sheet for A36 → · Equivalent grades → · ASTM A36 →
UNS K — the neighbouring numbers
| UNS number | Grade | Type |
|---|---|---|
| K02303 | A572 Grade 50 | High-strength low-alloy (HSLA) columbium-vanadium structural steel |
| K02700 | A516 Grade 70 | Carbon steel plate for pressure vessels, moderate and lower temperature |
| K03005 | A53 Grade B | Pipe steel for general and structural service, welded or seamless |
| K03006 | A106 Grade B | Seamless carbon steel pipe for high-temperature service |
| K03006 | A333 Grade 6 | Carbon steel pipe for low-temperature service, impact tested at −45 °C |
Same UNS letter, so the same alloy family. The digits generally carry an older AISI or SAE number.