Carbon Steel Square Seamless Pipe | Structural & Mechanical Seamless Square Tube
PRODUCT PARAMETERS
Contact:
Description
🟧 Product Overview
Carbon Steel Square Seamless Pipe is manufactured through hot rolling or cold drawing to achieve excellent mechanical strength, uniform wall thickness, and precise dimensions. Its seamless structure provides superior load‑bearing performance and reliability, making it ideal for structural engineering, machinery manufacturing, and industrial frameworks.
Compared with welded square tubes, seamless square pipes offer higher pressure resistance, better mechanical properties, and improved durability.
🟧 Standards
Available Standards (depending on customer requirements):
- ASTM A106
- ASTM A53
- EN 10210 / S355
- GB/T 8162
- GB/T 8163
- GB/T 3087
🟧 Product Specifications & Available Sizes
| Specification | Details |
|---|---|
| Size (Square) | 10×10 – 400×400 mm |
| Wall Thickness | 1–40 mm |
| Length | 5.8 m / 6 m / 12 m / custom |
| Manufacturing Process | Hot Rolled / Cold Drawn |
| Surface | Black / Oiled / Varnished |
| Ends | Plain End / Beveled End |
| Tolerance | As per applicable standard |
| Dimensions mm | Dimensions mm |
|---|---|
| 20*20*1.0 | 80*80*3.5 |
| 25*25*1.8 | 80*80*7.75 |
| 25*25*2 | 100*100*11.75 |
| 25*25*2.5 | 100*100*2.75 |
| 25*25*2.75 | 100*100*3.75 |
| 250*250*9.5 | 100*100*4.75 |
| 30*30*0.7 | 100*100*7.75 |
| 30*30*1.5 | 120*120*2.75 |
| 30*30*1.8 | 120*120*4.75 |
| 30*30*2 | 150*150*11.75 |
| 30*30*2.5 | 150*150*3.75 |
| 30*30*2.75 | 150*150*5.75 |
| 40*40*1.5 | 180*180*8 |
| 40*40*2.5 | 200*200*4.75 |
| 50*50*2.5 | 200*200*7.5 |
| 50*50*2.5 | 200*200*7.75 |
| 50*50*3.0 | 300*300*11.75 |
| 50*50*3.5 | 300*300*12 |
| 50*50*3.5 | 300*300*9.75 |
| 60*60*2.5 | 400*400*11.5 |
| 60*60*3.0 | 400*400*11.75 |
| 80*80*2.5 | 500*500*11.75 |
| The above are the general items, for the special types, we can also meet your needs. | |
🟧 Chemical Composition (Typical for Carbon Steel)
| Element | Range (%) |
|---|---|
| C | 0.06–0.30 |
| Mn | 0.25–1.20 |
| Si | ≤ 0.35 |
| P | ≤ 0.035 |
| S | ≤ 0.035 |
（The specific composition may vary slightly depending on the standard）
🟧 Mechanical Properties
| Property | Typical Value |
|---|---|
| Tensile Strength | 350–600 MPa |
| Yield Strength | 200–450 MPa |
| Elongation | ≥ 20% |
| Hardness | ≤ 187 HB |
🟧 Primary Industry Usage
- Structural engineering
- Steel frameworks
- Machinery manufacturing
- Automotive and equipment fabrication
- Mechanical support structures
- Construction and industrial projects
🟧 Why Use Carbon Steel Square Seamless Pipe
- Seamless structure ensures superior strength
- Excellent weldability and machinability
- High load‑bearing capacity
- Suitable for both structural and mechanical applications
- Available in a wide range of sizes and thicknesses
🟧 Why Choose Jaron Steel
- High‑precision seamless square tubes
- Hot rolled and cold drawn options available
- SGS / BV inspection services
- Custom cutting, beveling, and processing
- Export‑grade seaworthy packaging
- Fast delivery from stock and mill production
International Standards
| China | America | Germany | Japan | France | Britain | International |
|---|---|---|---|---|---|---|
| GB3077 | AlSI | DIN | JIS | NE | BS | ISO |
| 20Mn2 | 13201221 | 20Mn5 | SMn21 | 20M5 | 150M19 | – |
| 30Mn2 | 1330 | 30Mn5 | SMn24 | 32M5 | 150M28 | – |
| 35Mn2 | 1335 | 36Mn5 | SMnl | 35M5 | 150M36 | – |
| 40Mn2 | 13401341 | – | SMn2 | 40M5 | – | – |
| 45Mn2 | 1345 | 46Mn7 | SMn3 | 45M5 | – | – |
| 50Mn2 | 1052 | 50Mn7 | – | 55M5 | – | – |
| 20MnV | – | 20MnV6 | – | – | – | |
| 30Mn2MoW | – | — | – | – | – | |
| 27SiMn | – | 27MnSi5 | – | – | – | |
| 35SiMn | – | 37MnSi5 | – | 38MS5 | – | – |
| 42SiMn | – | 38MnSi446MnSi4 | – | 38MS5 | – | – |
| 20SiMn2MoV | – | – | – | – | – | – |
| 25SiMn2MoV | – | – | – | – | – | – |
| 37SiMn2MoV | – | – | – | – | – | – |
| 40B | 14B35 | 35B2 | – | – | – | – |
| 45B | 50B46H | 45B2 | – | – | – | – |
| 50B | 14B50 | – | – | – | – | – |
| 4OM∏B | 15B41 | – | – | – | – | – |
| 45MnB | 15B4850B44 | – | – | – | – | – |
| 20Mn2B | – | – | – | – | – | – |
| 20MnMoB | 80B20 | – | – | – | – | – |
| 15MnVB | – | – | – | – | – | – |
| – | – | – | – | – | – | – |
| – | – | – | – | – | – | – |
| 20MnVB | – | – | – | – | – | – |
| 40MnVB | – | – | – | – | – | – |
| 20MnTiB | – | – | – | – | – | – |
| 25MnTiBRE | – | – | – | – | – | – |
| 2OSiMnVB | – | – | – | – | – | – |
| 15Cr | 50155115 | 15Cr3 | SCr21 | 12C3 | 523A14523M15 | – |
| 15CrA | – | – | – | – | – | – |
| 20Cr | 5120 | 20Cr4 | SCr22 | 18C318C4 | 527A19527M20 | 683/1120Cr420CrS4 |
| 30Cr | 5130 | 28Cr4 | SCr2 | 28C432C4 | 530A30530A32 | – |
| 35Cr | 5135 | 34Cr437Cr4 | SCr3 | 38C4 | 530A36 | 683/83、 3a、 3b |
| 40Cr | 5140 | 38Cr441Cr4 | SCr4 | 42C4 | 530A40530M40 | 683/14、 4a^ 4b |
| 45Cr | 5145 | 42Cr4 | SCR5 | 45C4 | – | – |
| 50Cr | 51505152 | – | – | 50C4 | En48 | – |
| 38CrSi | – | – | – | – | – | – |
| 12CrMo | 4119 | 13CrMo44 | – | 12CD415CD2 | – | – |
| 15CrMo | ASTMA-387Gr. B | 15CrMo516CrMo44 | SCM21 | 15CD4. 05 | BS1653 | – |
| 20CrMo | 4118 | 20CrMo522CrMo4 | SCM22 | 18CD420CD4 | CDS 12CDSllO | – |
| 30CrMo | 4130 | 25CrMo4 | SCM2 | 30CD4 | CDS 13 | – |
| 30CrMoA | – | 32CrMol23ICRMo12 | – | – | – | – |
| 35CrMo | 41354137 | 34CrMo435CrMo4 | SCM3 | 35CD4 | 78A37 | 683/1C35eaC35eb |
| 42CrMo | 41404142 | 41CrMo442CrMo4 | SCM4 | 40CD442CD4 | 708M40708A42709M40 | 683/13 |
| 12CrMoV | – | – | – | – | – | – |
| 35CrMoV | – | 35CrMoV5 | – | – | – | – |
| 12CrlMoV | – | 13CrMoV4.2 | – | – | – | – |
| 25Cr2MoVA | – | 24CrMoV5.5 | – | – | – | – |
| 25Cr2MolVA | – | – | – | – | – | – |
| 20CR3MoWVA | – | 21CrVMoW12 | – | – | – | – |
| 38CrMoΛl | 6370 (ΛMS) | 34CrAlMo541CrAlMo7 | SACM645 | 40CAD6.12 | 905M39 | 683/1041CrAlMo74 |
| 20CrV | 6120 | 22CrV4 | – | 22CrV4 | – | – |
| 40CrV | 6140 | 42CrV | – | 42CrV4 | – | – |
| 50CrVA | 6150 | 50CrV4 | SUPlO | 50CV4 | 735A50 | – |
| 15CrMn | – | 16MnCr5 | – | 16MC5 | – | – |
| 20CrMn | 5120 | 20MnCr5 | SMC21 | 20MC5 | – | – |
| 40CrMn | 5140 | – | SMC3 | – | – | – |
| 20CrMnSi | – | – | – | – | – | |
| 25CrMnSi | – | – | SMKl | – | – | – |
| 30CrMnSi | – | – | – | – | – | – |
| 30CrMnSiA | – | – | – | – | – | – |
| 35CrMnSiA | – | – | SMK2 | – | – | – |
| 20CrMnMo | 4119 | 20CrMo5 | SCM23 | – | – | – |
| 40CrMnMo | 4140 | – | – | – | – | – |
| 20CrMnTi | – | – | SMK22 | – | – | – |
| 30CrMnTi | – | 30MnCrTi4 | – | – | – | – |
| 20CrNi | 3120 | 20NiCr6 | – | 20NC6 | 637A16637M17 | – |
| 40CrNi | 3140 | 46NiCr6 | SNCl | 35NC6 | 640A35640M40 | – |
| 45CrNi | 3145 | 45NiCr6 | – | – | – | – |
| 50CrNi | 3150 | – | – | – | – | – |
| 12CrNi2 | 3115 | 14NiCrlO | SNC21 | IONCll14NC11 | – | – |
| 12CrNi3 | 3310 | 13NiCrl2 | SNC22 | 10NC1214NC12 | 655A12655M13 | – |
| 20CrNi3 | – | 22NiCrl4 | – | 20NC11 | – | – |
| 30CrNi3 | – | 28NiCrlO31NiCrl4 | SNC2 | 30NC1130NC12 | – | – |
| 37CrNi3 | – | 35NiCrl8 | SNC3 | 35NC15 | – | – |
| 12Cr2Ni4 | E3310 | 14NiCrl8 | – | 12NC15 | – | – |
| 20Cr2Ni4 | E3316 | 22NiCrl4 | – | 20NC14 | 659A15659M15 | – |
| 20CrNiMo | 8620 8720 | 20NiCrMo221NiCrMo2 | – | 20NCD2 | 805A20805M20 | – |
| 40CrNiMoA | 4340 9840 | 36NiCrMo440NiCrMo6 | SNCM8 | 35NCD540NCD3 | 817M40816M40 | – |
| 45CrNiMoVA | 4437 | – | SNCM9 | – | – | – |
| 18Cr2Ni4WA | ||||||
| 25Cr2Ni4WA |
JaronSteel Factory, Shipments
