Grades · 15CrMo
15CrMo Alloy Steel Tube
Chromium-molybdenum grade for elevated-temperature pressure service. The workhorse of boiler and refinery piping below the P22 range, with good weldability for field construction.
38
Sizes in stock
Φ310–630
OD range (mm)
26–69
Wall range (mm)
GB 5310
Standard
International equivalents
| Chinese standard | GB 5310 · GB/T 9948 |
|---|---|
| Closest equivalent | ASTM A335 P12 |
| Also comparable | EN 13CrMo4-5 / 1.7335 |
Typical properties
| Tensile strength | ≥ 440 MPa (standard minimum) |
|---|---|
| Yield strength | ≥ 235 MPa (standard minimum) |
| Service | Elevated temperature, pressure-bearing |
Typical applications
- Boiler and superheater piping
- Refinery and petrochemical high-temperature lines
- Pressure vessel components
Delivery conditions
The delivery condition changes the material more than most buyers expect. Tell us what the part has to do and we will recommend one.
Normalized & temperedAnnealedStress relieved
15CrMo sizes on the ground
38 combinations, updated 2026-08-22. Quantities turn over daily — confirm availability when you inquire.
| OD × Wall (mm) | OD (in) |
|---|---|
| Φ310 × 57 | 12.20″ |
| Φ310 × 65 | 12.20″ |
| Φ356 × 63 | 14.02″ |
| Φ356 × 69 | 14.02″ |
| Φ377 × 46 | 14.84″ |
| Φ426 × 26 | 16.77″ |
| Φ426 × 27 | 16.77″ |
| Φ426 × 31 | 16.77″ |
| Φ426 × 39 | 16.77″ |
| Φ426 × 51 | 16.77″ |
| Φ426 × 52 | 16.77″ |
| Φ457 × 27 | 17.99″ |
| Φ457 × 37 | 17.99″ |
| Φ457 × 54 | 17.99″ |
| Φ508 × 28 | 20.00″ |
| Φ508 × 29 | 20.00″ |
| Φ508 × 32 | 20.00″ |
| Φ508 × 34 | 20.00″ |
| Φ508 × 35 | 20.00″ |
| Φ508 × 36 | 20.00″ |
| Φ530 × 45 | 20.87″ |
| Φ535 × 45 | 21.06″ |
| Φ540 × 45 | 21.26″ |
| Φ610 × 36 | 24.02″ |
| Φ610 × 38 | 24.02″ |
| Φ610 × 40 | 24.02″ |
| Φ610 × 42 | 24.02″ |
| Φ610 × 50 | 24.02″ |
| Φ610 × 51 | 24.02″ |
| Φ610 × 60 | 24.02″ |
| Φ630 × 36 | 24.80″ |
| Φ630 × 40 | 24.80″ |
| Φ630 × 45 | 24.80″ |
| Φ630 × 50 | 24.80″ |
| Φ630 × 51 | 24.80″ |
| Φ630 × 55 | 24.80″ |
| Φ630 × 58 | 24.80″ |
| Φ630 × 60 | 24.80″ |
15CrMo — common questions
- What is 15CrMo equivalent to?
- 15CrMo is closest to ASTM A335 P12, EN 13CrMo4-5 / 1.7335. These are the standard comparisons used for sourcing; the mill certificate supplied with each shipment carries the actual chemistry and mechanical values for the heat.
- What sizes of 15CrMo do you stock?
- We currently hold 38 size combinations of 15CrMo, from Φ310mm to Φ630mm outside diameter with wall thickness from 26mm to 69mm.
- Can you supply 15CrMo heat treated?
- Yes. We supply 15CrMo in these delivery conditions: Normalized & tempered, Annealed, Stress relieved. Heat treatment is done in-house before shipment and process records with temperature curves ship with the goods.
- Can 15CrMo be cut to length before shipment?
- Yes. We saw-cut to fixed lengths with a typical tolerance of ±1–2mm and end squareness of ≤1mm/100mm, so the material can go straight onto your machine without a facing operation.
Need 15CrMo in a size that isn't listed?
Non-standard sizes are our specialty — and for repeat requirements we hold dedicated stock. Send your size list and we'll confirm within 24 hours.