Custom Carbon Steel Pipe Cut to Length 16Mn Welded Steel Pipe
Length:10mm-25000mm,cut to length
Outer diameters:10mm-3000mm
Custom steel pipe
- Overview
- Recommended Products

Product Induction
The 16Mn Welded Pipe, standardized as Q345, is an indispensable component in numerous industries due to its robust properties and versatility. As a commonly used low-alloy high-strength structural steel in China, it is designed to withstand the rigorous demands of sectors such as petroleum, chemical engineering, mechanical manufacturing, construction, and coal mining.
Key Features and Benefits:
1. Exceptional Strength and Durability: The 16Mn Welded Pipe is engineered to deliver high tensile strength and durability, making it ideal for structural applications that require reliable support and stability.
2. Versatile Applications: Its adaptability makes it suitable for a wide array of uses, from supporting infrastructure in construction projects to withstanding harsh conditions in chemical plants and coal mines.
3. Cost-Effective Solution: Offering a balance of performance and affordability, the 16Mn Welded Pipe is a cost-efficient choice for industries looking to optimize their operations without compromising on quality.
4. High-Quality Construction: Manufactured using superior materials, this pipe ensures longevity and consistent performance, reducing the need for frequent replacements and maintenance.
5. Compliance with Standards: As a product standardized as Q345, it meets stringent quality and safety standards, providing peace of mind to engineers and project managers.

Specification
| Product Name | 16Mn welded steel pipe |
| Technique | hot rolled/cold rolled |
| Grade Can be Supplied | Structural pipe,Liquid pipe,High pressure boiler tube,Pipeline,Alloy pipe,Structure pipe,Vehicle pipe,Pipe for pipe mould,Pipe for hydraulic prop,Pipe for fluid transmission all types seamless pipes with all,grades can be produced. |
| Outer diameters | 10mm-3000mm |
| Wall thickness | 0.5mm-400mm |
| Length | 10mm-25000mm |
| OEM/ODM | available |
| Processing Service | welding cutting bending |
chemical composition
| Grade | C % | Mn % | Si % | P % | S % |
| 16Mn | 0.12-0.2 | 1.2-1.6 | 0.2-0.55 | ≤0.035 | ≤0.035 |
mechanical properties
| Grade | tensile strength | yield strength | elongation % |
| 16Mn | 470-630 MPa | ≥345 MPa | ≥21% |
16Mn stock
| OD*WT | WEIGHT | OD*WT | WEIGHT | OD*WT |
WEIGHT |
OD*WT | WEIGHT |
76*12 |
7.032 |
76*18 |
18.43 |
76*25 |
24.25 |
83*20 |
7.49 |
83*25 |
18.164 |
89*14 |
12.42 |
89*16 |
15.34 |
89*17 |
0.282 |
89*22 |
5.76 |
95*16 |
9.794 |
95*18 |
8.188 |
95*20 |
0.726 |
95*28 |
6.962 |
95*30 |
1.178 |
102*14 |
0.544 |
102*18 |
0.654 |
102*35 |
3.604 |
108*35 |
0.734 |
114*20 |
1.03 |
114*22 |
1.046 |
121*16 |
4.762 |
121*25 |
13.542 |
121*25 |
20.372 |
121*28 |
16.206 |
121*28 |
20.592 |
121*30 |
26.386 |
121*32 |
3.986 |
121*35 |
4.69 |
121*38 |
4.756 |
127*18 |
2.17 |
127*20 |
4.186 |
127*20 |
4.186 |
127*20 |
5.03 |
127*22 |
8.116 |
127*32 |
8.268 |
127*38 |
0.686 |
133*14 |
1.784 |
133*18 |
0.532 |
133*20 |
19.208 |
133*22 |
26.818 |
133*30 |
8.696 |
133*30 |
8.94 |
133*35 |
2.614 |
133*38 |
5.356 |
140*16 |
0.452 |
140*16 |
4.07 |
140*22 |
8.706 |
140*25 |
7.968 |
140*28 |
7.434 |
140*32 |
16.046 |
140*35 |
6.04 |
140*38 |
18.062 |
140*40 |
9.51 |
146*18 |
4.45 |
146*20 |
10.29 |
146*25 |
0.732 |
146*28 |
5.974 |
146*30 |
3.936 |
152*15.5 |
0.406 |
152*18 |
2.57 |
152*45 |
5.622 |
159*24.5 |
1.336 |
159*16 |
1.002 |
159*28 |
0.724 |
159*45 |
4.458 |
159*50 |
5.488 |
168*22 |
10.882 |
168*22 |
5.894 |
168*25 |
1.908 |
168*32 |
14.476 |
168*35 |
8.942 |
168*35 |
13.412 |
168*38 |
1.12 |
180*20 |
13.956 |
180*20 |
3.064 |
180*22 |
16.05 |
180*28 |
21.216 |
180*32 |
3.412 |
180*35 |
12.244 |
180*40 |
16.784 |
180*42 |
1.598 |
180*45 |
6.343 |
180*46 |
20.375 |
180*48 |
11.75 |
194*18 |
0.7 |
194*20 |
14.72 |
194*22 |
8.152 |
194*25 |
0.772 |
194*25 |
2.124 |
194*28 |
2.054 |
194*30 | 6.284 |
194*32 |
8.384 |
194*35 |
1.572 |
194*38 |
4.676 |
194*45 |
21.958 |
194*45 |
4.758 |
194*48 |
1.564 |
194*55 |
2.99 |
194*60 |
7.816 |
194*60 |
12.076 |
203*28 |
11.138 |
203*30 |
11.492 |
203*35 |
15.728 |
203*40 |
1.594 |
203*55 |
3.116 |
203*60 |
3.102 |
203*65 |
3.012 |
219*30 |
14.434 |
219*38 |
11.68 |
219*40 |
8.018 |
219*42 |
2.02 |
219*45 |
8.026 |
219*45 |
5.93 |
219*48 |
1.918 |
219*50 |
2.036 |
219*50 |
3.976 |
219*55 |
13.62 |
219*60 |
1.976 |
219*60 |
3.914 |
219*65 |
21.452 |
232*28 |
2.55 |
232*30 |
9.548 |
232*32 |
7.88 |
232*35 |
17.702 |
232*38 |
11.816 |
232*40 |
17.754 |
232*42 |
1.998 |
232*45 |
15.846 |
232*50 |
7.994 |
232*55 |
3.95 |
232*55 |
5.686 |
232*60 |
15.678 |
232*65 |
5.83 |
232*65 |
3.912 |
245*28 |
14.054 |
245*40 |
21.824 |
245*42 |
12.126 |
245*42 |
1.942 |
245*45 |
24.1 |
245*48 |
1.824 |
245*50 |
11.78 |
245*55 |
5.826 |
245*55 |
11.836 |
245*60 |
26.552 |
245*65 |
14.562 |
245*65 |
9.564 |
254*35 |
1.608 |
254*35 |
15.984 |
254*40 |
36.372 |
254*45 |
14.624 |
254*48 |
9.614 |
254*48 |
2.424 |
254*50 |
46.022 |
254*55 |
7.22 |
254*60 |
9.57 |
254*65 |
2.45 |
267*35 |
11.946 |
267*50 |
12.102 |
273*35 |
16.21 |
273*38 |
9.712 |
273*40 |
38.994 |
273*45 |
16.95 |
273*50 |
41.308 |
273*55 |
9.618 |
273*55 |
19.396 |
273*60 |
12.12 |
273*65 |
19.324 |
273*65 |
2.338 |
285*60 |
7.184 |
285*60 |
2.308 |
Key Advantages of 16Mn
High strength: 15%–20% lighter than Q235 carbon steel under the same load
Good weldability: Carbon equivalent (Ceq) ≤ 0.42%, low crack sensitivity
Low-temperature toughness: Maintains good toughness at -40°C, outperforming Q235
Excellent workability: Good hot-bending, cold-bending, and machining properties
Compared to other carbon steel welded pipes
| Comparison item | 16Mn welded pipe |
Q235 welded pipe | 20 # welded pipe |
Yield strength |
≥345 MPa | ≥235 MPa | ≥245 MPa |
Tensile strength |
470-630 MPa | 375-500 MPa | 410-550 MPa |
Low-temperature toughness |
-40℃ | Becomes brittle at temperatures below -20°C |
Generally |
Weldability |
Good, requires preheating (thick plates) |
Excellent |
Good |
Price |
5–8% higher |
Benchmark |
Intermediate |
Operating pressure |
Medium to high pressure (up to 4 MPa) |
Low pressure (≤2.5 MPa) |
Low to medium pressure |
FAQ
Q: What are the advantages of 16Mn welded pipes over Q235 welded pipes?
A: The key advantages are high strength and good toughness.
Q: Can 16Mn welded steel pipes be used as a substitute for seamless steel pipes?
A: They can be used as a substitute for applications such as low-pressure fluid conveyance, structural support, and general machining. However, they cannot be used as a substitute for high-pressure boiler tubes (≥10 MPa), high-temperature and high-pressure hydrogen-containing environments, or nuclear-grade piping.
Q: Can 16Mn welded pipes withstand high temperatures?
A: Generally, up to 350°C. For higher temperatures, alloy steels such as 15CrMo should be selected.
Q: Do 16Mn welded pipes require heat treatment?
A: Usually not. Normalizing may be performed for thick-walled pipes or those requiring high strength.
Q: What is the service life of 16Mn welded pipes?
A: 10–20 years in corrosive environments; with anti-corrosion treatment, it can exceed 30 years.
Q: How can I get your quotation as soon as possible?
A:Please contact:
Email:[email protected]
Wechat/whatsapp/mobile: + 86 13512028034
