Audited Supplier
1.Carbon steel: Carbon steel is a type of steel containing carbon elements, which has good strength and plasticity, relatively low cost, and is currently one of the most widely used materials for motorcycle pillars
2.Alloy steel: In addition to carbon, alloy steel also contains other alloying elements, which have high strength and hardness. It is suitable for use in high load, high-strength motorcycles, but the cost is relatively high
Our company specializes in producing steel pipes for motorcycle pillars, with various specifications available. The surface is black or saponified. We provide supporting services for major motorcycle brands both domestically and internationally.like Honda, Suzuki, Yamaha, Daye, Haojue , etc
| GRADE | external diameter | wall thickness | internal diameter | GRADE | external diameter | wall thickness | internal diameter |
| 35# | 37.5 | 9.75 | 18 | 20# | 35.6 | 6.8 | 22 |
| 42CrMo | 35.5 | 6 | 23.5 | 20# | 35.5 | 7.3 | 20.9 |
| 35# | 35.1 | 7.55 | 20 | 20# | 34.5 | 10.3 | 13.9 |
| 20# | 34.5 | 5.3 | 23.9 | 35# | 34.5 | 9 | 16.5 |
| 37Mn5 | 33.8 | 6.9 | 20 | 20# | 32.1 | 6.2 | 19.7 |
| 20# | 32.1 | 5.2 | 21.7 | 20#/35# | 32 | 6.4 | 19.2 |
| 20# | 32 | 6 | 20 | 35# | 32 | 6.15 | 19.7 |
| 20# | 32 | 5.15 | 21.7 | 20# | 32 | 6.05 | 19.9 |
| 20# | 31.5 | 5.3 | 20.9 | 20# | 31.5 | 4 | 23.5 |
| 20# | 30.7 | 5.4 | 19.9 | 20# | 30.6 | 4.8 | 21 |
| 20# | 30.6 | 5.3 | 20 | 20# | 30.6 | 4.8 | 21 |
| 35# | 30.5 | 7.2 | 16.1 | 20# | 30.5 | 5.3 | 19.9 |
| 20# | 30.5 | 3.5 | 23.5 | 20#/35# | 30.5 | 6.5 | 17.5 |
| 35# | 30.5 | 5.3 | 19.9 | 20# | 29.5 | 5.25 | 19 |
| 20# | 29.4 | 4.5 | 20.4 | 20# | 29.4 | 4.75 | 19.9 |
| 20# | 29.4 | 4.5 | 20.4 | 20# | 29.4 | 4.75 | 19.9 |
| 20# | 29.3 | 5 | 19.3 | 20# | 29 | 5.5 | 18 |
| 20# | 29 | 5 | 19 | 35# | 29 | 9 | 11 |
| 20# | 28.6 | 3 | 22.6 | 20# | 28 | 4 | 20 |
| 20# | 27.5 | 4.75 | 18 | 20# | 27.5 | 4.3 | 18.9 |
| 20# | 27.5 | 4.5 | 18.5 | 20# | 27.5 | 5.25 | 17 |
| 20# | 27.5 | 4.25 | 19 | 20# | 26.5 | 4.75 | 17 |
| 20# | 26.5 | 3.5 | 19.5 | 20# | 26 | 3.85 | 18.3 |
| Q355 | 26 | 4.4 | 17.2 | 20# | 25.7 | 4.3 | 17.1 |
| 20# | 25.7 | 3.85 | 18 | 35#/20# | 25.6 | 5 | 15.6 |
| 20# | 25.4 | 3.5 | 18.4 | 20# | 25.4 | 4.2 | 17 |
| 20# | 25.4 | 4.7 | 16 | 20# | 25.4 | 3 | 19.4 |
| 20# | 25 | 4 | 17 | 20# | 24.5 | 4.3 | 15.9 |
| 20# | 24.5 | 4.75 | 15 | 20# | 23.1 | 3.55 | 16 |
| 20# | 23 | 3 | 17 |
| Equivalent Material referance: | ||||||
| GB | TOCT | ASTM | BS | JIS | NF | DIN |
| 20 | 20 | 1020 | 050A20 | S20C | XC18 | C22,CK22 |
| 45 | 45 | 1045 | 080M46 | S45C | XC45 | C45,CK45 |
| 40Cr | 5140 | 41Cr4 | SCR440 | 41Cr4/38Cr4 | 41Cr4/42Cr4 | |
| 40Mn2 | 1340 | SMn438 | 42Mn6 | |||
| 37Mn5 | ||||||
| GRADE | chemical composition% | ||||||||
| C | Si | Mn | Cr | Ni | Mo | Gu | P | S | |
| 20# | 0.17~0.23 | 0.17~0.37 | 0.35~0.65 | ≤0.25 | ≤0.30 | ---- | ≤0.20 | ≤0.035 | ≤0.035 |
| 45# | 0.42~0.50 | 0.17~0.37 | 0.50~0.80 | ≤0.25 | ≤0.30 | ---- | ≤0.20 | ≤0.035 | ≤0.035 |
| 40Cr | 0.37~0.44 | 0.17~0.37 | 0.50~0.80 | 0.80~1.10 | ≤0.30 | ≤0.1 | ≤0.20 | ≤0.030 | ≤0.030 |
| 40Mn2 | 0.37~0.44 | 0.17~0.37 | 1.40~1.80 | ≤0.30 | ≤0.30 | ≤0.1 | ≤0.20 | ≤0.030 | ≤0.030 |
| 37Mn | 0.30~0.39 | 0.15~0.30 | 1.20~1.50 | ≤0.35 | ≤0.30 | ≤0.1 | ≤0.20 | ≤0.020 | ≤0.015 |
| steel grade | +C(BK) | +LC(BKW) | +SR(BKS) | +A(GBK) | +N(NBK) | |||||||
| Rm(Mpa) | A(%) | Rm(Mpa) | A(%) | Rm(Mpa) | Reh(Mpa) | A(%) | Rm(Mpa) | A(%) | Rm(Mpa) | Reh(Mpa) | A(%) | |
| 10 | 430 | 8 | 380 | 10 | 400 | 300 | 16 | 335 | 24 | 320~450 | 215 | 27 |
| 20 | 550 | 5 | 520 | 8 | 520 | 375 | 12 | 390 | 21 | 440~570 | 255 | 21 |
| 35 | 590 | 5 | 550 | 7 | - | - | - | 510 | 17 | ≥460 | 280 | 21 |
| 45 | 645 | 4 | 630 | 6 | - | - | - | 590 | 14 | 540 | 340 | 18 |
| 25Mn | 650 | 6 | 580 | 8 | 580 | 450 | 10 | 490 | 18 | - | - | - |
| Q355B | 640 | 4 | 580 | 7 | 580 | 450 | 10 | 450 | 22 | 490~630 | 355 | 22 |
| Q420B | 750 | 4 | 620 | 8 | 690 | 590 | 12 | 520 | 22 | 550~700 | 425 | 22 |
| 25CrMo | 720 | 4 | 670 | 6 | - | - | - | - | - | - | - | - |
| 42CrMo | 720 | 4 | 670 | 6 | - | - | - | - | - | - | - | - |
Testing items
| category | Serial Number | Inspection items | technical requirement | Testing methods | Sampling frequency |
| 1.appearance | 1 | check | Check if the identification sheet matches the specifications, furnace batch number, and material | visualization | all |
| 2 | SURFACE QUALITY | There are no defects such as rust, cracks, peeling, or pulling marks on the inner and outer surfaces | visualization | Take 2 samples from each batch | |
| 2.size | 3 | Outer diameter * wall thickness | According to the drawing requirements | Outside micrometer and Wall thickness micrometer | Take 10 samples from each batch |
| 4 | inside diameter | According to the drawing requirements | dial caliper guge | Take 10 samples from each batch | |
| 3.mechanical property | 5 | flatten | According to technical requirements, cracks or fissures are not allowed to appear when pressed to a certain height | Universal testing machine | Take 2 samples from each batch |
| 6 | flaring | According to the technical requirements, there should be no cracks at the expansion point when the expansion reaches the required size | Universal testing machine | Take 2 samples from each batch | |
| 7 | Bend and break | The fracture surface is delicate and uniform, with obvious plastic deformation and no visible reflective grains | Universal testing machine | Take 2 samples from each batch | |
| 8 | stretch | Tensile strength, yield strength, and elongation meet technical requirements | Universal testing machine | Take 2 samples from each batch | |
| 9 | Element content | The element content meets the standard requirements | a spectrometer | Take 2 samples from each batch |
For many years, we have been providing support to top motorcycle factories both domestically and internationally, with rich experience and trustworthiness.
Q: Are you trading company or manufacturer?
A: We are professional manufacturer for steel pipes,and our company also is a very professional and technical foreign trade company for steel products. We have more export experience with competitive price and best after-sales service. Apart from this,we can provide a wide range of steel products to meet the requirement of customer.
Q:Will you delivery the goods on time?
A: Yes,we promise to provide best quality products and delivery on time no matter if the price change lot or not. Honesty is our company's tenet.
Q: Do you provide samples ? is it free or extra?
A: The sample could can provide for customer with free,but the freight will be covered by customer account. The sample freight will be returned to customer account after we cooperate.
Q: How can I get your quotation as soon as possible?
A: The email and fax will be checked within 24 hours,meanwhile,Wechat and WhatsApp will be online in 24 hours. Please send us your requirement and order information,specification(Steel grade,size,quantity,destination port),we will work out a best price soon.
Q: Do you have any certifications?
A: Yes,that's what we guarantee to our clients. we have IS09000,IATF16949 certinicate,ISO 14001 certificates etc.Our products are of high quality and we have professional engineers and development team.
Q: What is your terms of payment?
A:Payment<=1000USD, 100% in advance. Payment>=1000USD, 30% T/T in advance ,balance before shipmenit or paid against copy of B/L within 5 working days. 100% Irrevocable L/C at sight is favorable payment term as well.
Q: Do you accept the third party inspection?
A: Yes absolutely we accept.
