Grades · 42CrMo
42CrMo Alloy Steel Tube
The chromium-molybdenum grade most heavy-duty machined parts are built from. As-rolled and quenched-and-tempered 42CrMo behave like two different materials — yield strength can differ by a factor of three — so the delivery condition matters more than the grade name.
289
Sizes in stock
Φ168–630
OD range (mm)
15–140
Wall range (mm)
GB/T 3077
Standard
International equivalents
| Chinese standard | GB/T 3077 |
|---|---|
| Closest equivalent | AISI 4140 |
| Also comparable | EN 42CrMo4 / 1.7225 |
| Also comparable | JIS SCM440 |
| Also comparable | ASTM A519 Gr.4140 |
Typical properties
| Tensile strength | ≥ 1080 MPa (Q&T, standard minimum, section-dependent) |
|---|---|
| Yield strength | ≥ 930 MPa (Q&T, standard minimum, section-dependent) |
| Hardness | Supplied to your specified HB or HRC band |
| Through-hardening | Good — suited to heavy sections |
Typical applications
- Hydraulic and pneumatic cylinder bodies
- Drive shafts, pins and bushings for construction and mining equipment
- Oilfield machining stock — couplings, subs, drill collars
- Gears, rollers and high-load structural 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.
Hot rolled (as-rolled)NormalizedQuenched & tempered to specified hardnessAnnealed for machining
42CrMo sizes on the ground
289 combinations, updated 2026-08-22. Quantities turn over daily — confirm availability when you inquire.
| OD × Wall (mm) | OD (in) |
|---|---|
| Φ168 × 15 | 6.61″ |
| Φ168 × 30 | 6.61″ |
| Φ168 × 40 | 6.61″ |
| Φ168 × 42 | 6.61″ |
| Φ180 × 28 | 7.09″ |
| Φ180 × 38 | 7.09″ |
| Φ180 × 42 | 7.09″ |
| Φ180 × 50 | 7.09″ |
| Φ188 × 24 | 7.40″ |
| Φ193.7 × 25.4 | 7.63″ |
| Φ194 × 25 | 7.64″ |
| Φ194 × 28 | 7.64″ |
| Φ194 × 30 | 7.64″ |
| Φ194 × 38 | 7.64″ |
| Φ203 × 28 | 7.99″ |
| Φ203 × 29 | 7.99″ |
| Φ203 × 50 | 7.99″ |
| Φ219 × 28 | 8.62″ |
| Φ219 × 30 | 8.62″ |
| Φ219 × 32 | 8.62″ |
| Φ219 × 38 | 8.62″ |
| Φ219 × 42 | 8.62″ |
| Φ219 × 55 | 8.62″ |
| Φ219 × 65 | 8.62″ |
| Φ224 × 35 | 8.82″ |
| Φ224 × 55 | 8.82″ |
| Φ232 × 40 | 9.13″ |
| Φ245 × 32 | 9.65″ |
| Φ245 × 38 | 9.65″ |
| Φ245 × 40 | 9.65″ |
| Φ245 × 55 | 9.65″ |
| Φ245 × 70 | 9.65″ |
| Φ254 × 42 | 10.00″ |
| Φ254 × 45 | 10.00″ |
| Φ254 × 60 | 10.00″ |
| Φ260 × 37.5 | 10.24″ |
| Φ260 × 70 | 10.24″ |
| Φ267 × 50 | 10.51″ |
| Φ267 × 60 | 10.51″ |
| Φ270 × 36 | 10.63″ |
| Φ273 × 25 | 10.75″ |
| Φ273 × 35 | 10.75″ |
| Φ273 × 45 | 10.75″ |
| Φ273 × 50 | 10.75″ |
| Φ273 × 65 | 10.75″ |
| Φ273 × 70 | 10.75″ |
| Φ273 × 75 | 10.75″ |
| Φ273 × 83 | 10.75″ |
| Φ280 × 36 | 11.02″ |
| Φ280 × 72 | 11.02″ |
| Φ285 × 39.5 | 11.22″ |
| Φ285 × 40 | 11.22″ |
| Φ285 × 42 | 11.22″ |
| Φ285 × 43 | 11.22″ |
| Φ285 × 55 | 11.22″ |
| Φ285 × 65 | 11.22″ |
| Φ285 × 70 | 11.22″ |
| Φ299 × 27 | 11.77″ |
| Φ299 × 30 | 11.77″ |
| Φ299 × 35 | 11.77″ |
| Φ299 × 40 | 11.77″ |
| Φ299 × 45 | 11.77″ |
| Φ299 × 60 | 11.77″ |
| Φ299 × 65 | 11.77″ |
| Φ299 × 70 | 11.77″ |
| Φ299 × 74 | 11.77″ |
| Φ299 × 75 | 11.77″ |
| Φ299 × 82 | 11.77″ |
| Φ306 × 30 | 12.05″ |
| Φ306 × 36 | 12.05″ |
| Φ306 × 50 | 12.05″ |
| Φ306 × 55 | 12.05″ |
| Φ306 × 85 | 12.05″ |
| Φ310 × 36 | 12.20″ |
| Φ325 × 30 | 12.80″ |
| Φ325 × 35 | 12.80″ |
| Φ325 × 37 | 12.80″ |
| Φ325 × 38 | 12.80″ |
| Φ325 × 40 | 12.80″ |
| Φ325 × 45 | 12.80″ |
| Φ325 × 50 | 12.80″ |
| Φ325 × 60 | 12.80″ |
| Φ325 × 70 | 12.80″ |
| Φ330 × 30 | 12.99″ |
| Φ330 × 49 | 12.99″ |
| Φ330 × 50 | 12.99″ |
| Φ340 × 39 | 13.39″ |
| Φ340 × 60 | 13.39″ |
| Φ340 × 65 | 13.39″ |
| Φ340 × 80 | 13.39″ |
| Φ340 × 85 | 13.39″ |
| Φ340 × 95 | 13.39″ |
| Φ340 × 105 | 13.39″ |
| Φ345 × 46.5 | 13.58″ |
| Φ351 × 30 | 13.82″ |
| Φ351 × 33 | 13.82″ |
| Φ351 × 45 | 13.82″ |
| Φ351 × 50 | 13.82″ |
| Φ351 × 55 | 13.82″ |
| Φ351 × 60 | 13.82″ |
| Φ351 × 70 | 13.82″ |
| Φ351 × 80 | 13.82″ |
| Φ351 × 85 | 13.82″ |
| Φ356 × 30 | 14.02″ |
| Φ356 × 40 | 14.02″ |
| Φ356 × 45 | 14.02″ |
| Φ356 × 50 | 14.02″ |
| Φ356 × 55 | 14.02″ |
| Φ356 × 60 | 14.02″ |
| Φ356 × 65 | 14.02″ |
| Φ356 × 75 | 14.02″ |
| Φ356 × 80 | 14.02″ |
| Φ356 × 85 | 14.02″ |
| Φ356 × 90 | 14.02″ |
| Φ368 × 30 | 14.49″ |
| Φ368 × 32 | 14.49″ |
| Φ377 × 25 | 14.84″ |
| Φ377 × 30 | 14.84″ |
| Φ377 × 32 | 14.84″ |
| Φ377 × 35 | 14.84″ |
| Φ377 × 40 | 14.84″ |
| Φ377 × 45 | 14.84″ |
| Φ377 × 50 | 14.84″ |
| Φ377 × 55 | 14.84″ |
| Φ377 × 60 | 14.84″ |
| Φ377 × 65 | 14.84″ |
| Φ377 × 70 | 14.84″ |
| Φ377 × 75 | 14.84″ |
| Φ377 × 80 | 14.84″ |
| Φ377 × 85 | 14.84″ |
| Φ377 × 90 | 14.84″ |
| Φ377 × 95 | 14.84″ |
| Φ377 × 100 | 14.84″ |
| Φ377 × 110 | 14.84″ |
| Φ381 × 44 | 15.00″ |
| Φ384 × 56 | 15.12″ |
| Φ390 × 35 | 15.35″ |
| Φ402 × 20 | 15.83″ |
| Φ402 × 25 | 15.83″ |
| Φ402 × 30 | 15.83″ |
| Φ402 × 40 | 15.83″ |
| Φ402 × 45 | 15.83″ |
| Φ402 × 50 | 15.83″ |
| Φ402 × 55 | 15.83″ |
| Φ402 × 60 | 15.83″ |
| Φ402 × 65 | 15.83″ |
| Φ402 × 70 | 15.83″ |
| Φ402 × 75 | 15.83″ |
| Φ402 × 80 | 15.83″ |
| Φ402 × 95 | 15.83″ |
| Φ406 × 20 | 15.98″ |
| Φ406 × 25 | 15.98″ |
| Φ406 × 30 | 15.98″ |
| Φ406 × 35 | 15.98″ |
| Φ406 × 40 | 15.98″ |
| Φ406 × 45 | 15.98″ |
| Φ406 × 50 | 15.98″ |
| Φ406 × 55 | 15.98″ |
| Φ406 × 60 | 15.98″ |
| Φ406 × 65 | 15.98″ |
| Φ406 × 75 | 15.98″ |
| Φ406 × 80 | 15.98″ |
| Φ406 × 85 | 15.98″ |
| Φ410 × 42 | 16.14″ |
| Φ426 × 20 | 16.77″ |
| Φ426 × 21 | 16.77″ |
| Φ426 × 22 | 16.77″ |
| Φ426 × 27 | 16.77″ |
| Φ426 × 29 | 16.77″ |
| Φ426 × 30 | 16.77″ |
| Φ426 × 35 | 16.77″ |
| Φ426 × 38 | 16.77″ |
| Φ426 × 40 | 16.77″ |
| Φ426 × 45 | 16.77″ |
| Φ426 × 50 | 16.77″ |
| Φ426 × 55 | 16.77″ |
| Φ426 × 60 | 16.77″ |
| Φ426 × 65 | 16.77″ |
| Φ426 × 70 | 16.77″ |
| Φ426 × 85 | 16.77″ |
| Φ426 × 90 | 16.77″ |
| Φ426 × 95 | 16.77″ |
| Φ440 × 30 | 17.32″ |
| Φ440 × 73 | 17.32″ |
| Φ450 × 33 | 17.72″ |
| Φ450 × 35 | 17.72″ |
| Φ450 × 40 | 17.72″ |
| Φ450 × 45 | 17.72″ |
| Φ450 × 60 | 17.72″ |
| Φ450 × 65 | 17.72″ |
| Φ450 × 70 | 17.72″ |
| Φ450 × 75 | 17.72″ |
| Φ450 × 90 | 17.72″ |
| Φ450 × 95 | 17.72″ |
| Φ455 × 85 | 17.91″ |
| Φ457 × 40 | 17.99″ |
| Φ457 × 45 | 17.99″ |
| Φ457 × 50 | 17.99″ |
| Φ457 × 55 | 17.99″ |
| Φ457 × 60 | 17.99″ |
| Φ457 × 65 | 17.99″ |
| Φ457 × 70 | 17.99″ |
| Φ457 × 75 | 17.99″ |
| Φ457 × 80 | 17.99″ |
| Φ457 × 85 | 17.99″ |
| Φ457 × 100 | 17.99″ |
| Φ480 × 35 | 18.90″ |
| Φ480 × 45 | 18.90″ |
| Φ480 × 50 | 18.90″ |
| Φ480 × 55 | 18.90″ |
| Φ480 × 60 | 18.90″ |
| Φ480 × 65 | 18.90″ |
| Φ480 × 70 | 18.90″ |
| Φ480 × 75 | 18.90″ |
| Φ490 × 80 | 19.29″ |
| Φ500 × 35 | 19.69″ |
| Φ500 × 40 | 19.69″ |
| Φ500 × 45 | 19.69″ |
| Φ500 × 50 | 19.69″ |
| Φ500 × 55 | 19.69″ |
| Φ500 × 70 | 19.69″ |
| Φ500 × 75 | 19.69″ |
| Φ508 × 32 | 20.00″ |
| Φ508 × 40 | 20.00″ |
| Φ508 × 45 | 20.00″ |
| Φ508 × 50 | 20.00″ |
| Φ508 × 70 | 20.00″ |
| Φ508 × 80 | 20.00″ |
| Φ530 × 30 | 20.87″ |
| Φ530 × 70 | 20.87″ |
| Φ530 × 75 | 20.87″ |
| Φ530 × 80 | 20.87″ |
| Φ530 × 85 | 20.87″ |
| Φ530 × 90 | 20.87″ |
| Φ540 × 62.5 | 21.26″ |
| Φ550 × 70 | 21.65″ |
| Φ550 × 80 | 21.65″ |
| Φ550 × 85 | 21.65″ |
| Φ550 × 90 | 21.65″ |
| Φ550 × 95 | 21.65″ |
| Φ550 × 100 | 21.65″ |
| Φ550 × 105 | 21.65″ |
| Φ550 × 110 | 21.65″ |
| Φ550 × 115 | 21.65″ |
| Φ550 × 120 | 21.65″ |
| Φ560 × 60 | 22.05″ |
| Φ560 × 65 | 22.05″ |
| Φ560 × 80 | 22.05″ |
| Φ560 × 85 | 22.05″ |
| Φ560 × 90 | 22.05″ |
| Φ560 × 100 | 22.05″ |
| Φ560 × 120 | 22.05″ |
| Φ560 × 140 | 22.05″ |
| Φ565 × 35 | 22.24″ |
| Φ570 × 60 | 22.44″ |
| Φ570 × 65 | 22.44″ |
| Φ570 × 70 | 22.44″ |
| Φ570 × 75 | 22.44″ |
| Φ570 × 120 | 22.44″ |
| Φ580 × 45 | 22.83″ |
| Φ580 × 50 | 22.83″ |
| Φ580 × 55 | 22.83″ |
| Φ580 × 60 | 22.83″ |
| Φ580 × 65 | 22.83″ |
| Φ580 × 70 | 22.83″ |
| Φ580 × 75 | 22.83″ |
| Φ580 × 80 | 22.83″ |
| Φ580 × 85 | 22.83″ |
| Φ580 × 90 | 22.83″ |
| Φ580 × 95 | 22.83″ |
| Φ580 × 130 | 22.83″ |
| Φ590 × 55 | 23.23″ |
| Φ595 × 55 | 23.43″ |
| Φ600 × 40 | 23.62″ |
| Φ600 × 50 | 23.62″ |
| Φ600 × 60 | 23.62″ |
| Φ600 × 70 | 23.62″ |
| Φ600 × 75 | 23.62″ |
| Φ600 × 80 | 23.62″ |
| Φ600 × 90 | 23.62″ |
| Φ610 × 40 | 24.02″ |
| Φ610 × 43 | 24.02″ |
| Φ610 × 80 | 24.02″ |
| Φ610 × 85 | 24.02″ |
| Φ610 × 90 | 24.02″ |
| Φ630 × 40 | 24.80″ |
| Φ630 × 50 | 24.80″ |
| Φ630 × 55 | 24.80″ |
| Φ630 × 65 | 24.80″ |
42CrMo — common questions
- What is 42CrMo equivalent to?
- 42CrMo is closest to AISI 4140, EN 42CrMo4 / 1.7225, JIS SCM440, ASTM A519 Gr.4140. 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 42CrMo do you stock?
- We currently hold 289 size combinations of 42CrMo, from Φ168mm to Φ630mm outside diameter with wall thickness from 15mm to 140mm.
- Can you supply 42CrMo heat treated?
- Yes. We supply 42CrMo in these delivery conditions: Hot rolled (as-rolled), Normalized, Quenched & tempered to specified hardness, Annealed for machining. Heat treatment is done in-house before shipment and process records with temperature curves ship with the goods.
- Can 42CrMo 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 42CrMo 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.