Grades · 30CrMnSiA
30CrMnSiA High-Strength Alloy Tube
A chromium-manganese-silicon grade used where strength-to-weight matters and 42CrMo is not quite enough. Common in aerospace-adjacent and high-load structural work; demands controlled heat treatment to reach its properties.
68
Sizes in stock
Φ180–614
OD range (mm)
20–72
Wall range (mm)
GB/T 3077
Standard
International equivalents
| Chinese standard | GB/T 3077 |
|---|---|
| Closest equivalent | Russian 30KhGSA |
| Also comparable | Comparable duty to AISI 4130 at higher strength |
Typical properties
| Tensile strength | ≥ 1080 MPa (Q&T, standard minimum) |
|---|---|
| Yield strength | ≥ 835 MPa (Q&T, standard minimum) |
| Elongation | ≥ 10% |
Typical applications
- High-load structural and aerospace-adjacent components
- Heavy-duty shafts and linkages
- High-pressure vessels and cylinders
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.
Hot rolledAnnealedQuenched & tempered
30CrMnSiA sizes on the ground
68 combinations, updated 2026-08-22. Quantities turn over daily — confirm availability when you inquire.
| OD × Wall (mm) | OD (in) |
|---|---|
| Φ180 × 24 | 7.09″ |
| Φ194 × 20 | 7.64″ |
| Φ194 × 21 | 7.64″ |
| Φ203 × 34 | 7.99″ |
| Φ240 × 38 | 9.45″ |
| Φ245 × 25 | 9.65″ |
| Φ245 × 27 | 9.65″ |
| Φ245 × 38 | 9.65″ |
| Φ267 × 38 | 10.51″ |
| Φ269 × 39 | 10.59″ |
| Φ270 × 45 | 10.63″ |
| Φ273 × 26 | 10.75″ |
| Φ285 × 60 | 11.22″ |
| Φ306 × 43 | 12.05″ |
| Φ310 × 45 | 12.20″ |
| Φ325 × 27 | 12.80″ |
| Φ325 × 28 | 12.80″ |
| Φ325 × 31 | 12.80″ |
| Φ325 × 52 | 12.80″ |
| Φ330 × 45 | 12.99″ |
| Φ351 × 30 | 13.82″ |
| Φ351 × 31 | 13.82″ |
| Φ351 × 32 | 13.82″ |
| Φ351 × 46 | 13.82″ |
| Φ377 × 33 | 14.84″ |
| Φ377 × 34 | 14.84″ |
| Φ377 × 60 | 14.84″ |
| Φ390 × 55 | 15.35″ |
| Φ390 × 56 | 15.35″ |
| Φ390 × 60 | 15.35″ |
| Φ395 × 40 | 15.55″ |
| Φ395 × 47 | 15.55″ |
| Φ400 × 60 | 15.75″ |
| Φ402 × 60 | 15.83″ |
| Φ402 × 63 | 15.83″ |
| Φ406 × 55 | 15.98″ |
| Φ406 × 60 | 15.98″ |
| Φ406 × 65 | 15.98″ |
| Φ410 × 60 | 16.14″ |
| Φ420 × 55 | 16.54″ |
| Φ426 × 35 | 16.77″ |
| Φ426 × 38 | 16.77″ |
| Φ426 × 39 | 16.77″ |
| Φ426 × 40 | 16.77″ |
| Φ426 × 45 | 16.77″ |
| Φ435 × 64 | 17.13″ |
| Φ450 × 42 | 17.72″ |
| Φ457 × 45 | 17.99″ |
| Φ457 × 55 | 17.99″ |
| Φ470 × 40 | 18.50″ |
| Φ473 × 42 | 18.62″ |
| Φ475 × 45 | 18.70″ |
| Φ485 × 68 | 19.09″ |
| Φ493 × 42 | 19.41″ |
| Φ500 × 48 | 19.69″ |
| Φ500 × 50 | 19.69″ |
| Φ502 × 68 | 19.76″ |
| Φ508 × 50 | 20.00″ |
| Φ510 × 72 | 20.08″ |
| Φ525 × 43 | 20.67″ |
| Φ530 × 45 | 20.87″ |
| Φ530 × 48 | 20.87″ |
| Φ530 × 55 | 20.87″ |
| Φ530 × 60 | 20.87″ |
| Φ585 × 50 | 23.03″ |
| Φ585 × 60 | 23.03″ |
| Φ590 × 50 | 23.23″ |
| Φ614 × 49 | 24.17″ |
30CrMnSiA — common questions
- What is 30CrMnSiA equivalent to?
- 30CrMnSiA is closest to Russian 30KhGSA, Comparable duty to AISI 4130 at higher strength. 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 30CrMnSiA do you stock?
- We currently hold 68 size combinations of 30CrMnSiA, from Φ180mm to Φ614mm outside diameter with wall thickness from 20mm to 72mm.
- Can you supply 30CrMnSiA heat treated?
- Yes. We supply 30CrMnSiA in these delivery conditions: Hot rolled, Annealed, Quenched & tempered. Heat treatment is done in-house before shipment and process records with temperature curves ship with the goods.
- Can 30CrMnSiA 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 30CrMnSiA 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.