Product Description
Cold rolled seamless pipe represents the pinnacle of precision in seamless steel pipe engineering. With unmatched dimensional accuracy and lustrous surface smoothness, these pipes are quintessential for applications in mechanical structures and hydraulic equipment. Notably, cold rolling surpasses hot rolling in precision, ensuring that every pipe meets the highest standards of quality and consistency.
Advantages:
Experience unparalleled efficiency with our cold rolling process, delivering rapid molding speeds and exceptional output without compromising the integrity of the coating. These pipes can be crafted into diverse cross-sectional forms to cater to a wide array of usage requirements. The cold rolling process induces remarkable plastic deformation, thereby enhancing the yield point of the steel, making it resilient and robust for varied industrial applications.
Embrace the future of steel piping with our high-precision cold-rolled seamless steel pipes, designed to conserve materials, boost processing efficiency, and optimize energy usage. These pipes boast rigorous standards of dimensional accuracy, exquisite surface smoothness, and impeccable roundness and straightness. The result? Significantly reduced machining hours and maximized material utilization, ultimately elevating the quality of your products to new heights.
Our versatile product finds its applications in a myriad of industries, being particularly indispensable for automotive and motorcycle parts, as well as hydraulic engineering machinery. Its adaptability and superior characteristics ensure it meets and exceeds the demands of modern engineering challenges.
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Product Parameters
This standard is applicable to alloy steel pipes used in machinery, automobiles, and other mechanical parts.
Grade |
C |
Si |
Mn |
S |
P |
Cr |
Mo |
SCr420TK |
0.18~0.23 |
0.15~0.35 |
0.60~0.85 |
≤0.030 |
≤0.030 |
0.90~1.20 |
0.15~0.30 |
SCM415TK |
0.13~0.18 |
0.15~0.35 |
0.60~0.85 |
≤0.030 |
≤0.030 |
0.90~1.20 |
0.15~0.30 |
SCM418TK |
0.16~0.21 |
0.15~0.35 |
0.60~0.85 |
≤0.030 |
≤0.030 |
0.90~1.20 |
0.15~0.30 |
SCM420TK |
0.18~0.23 |
0.15~0.35 |
0.60~0.85 |
≤0.030 |
≤0.030 |
0.90~1.20 |
0.15~0.30 |
SCM430TK |
0.28~0.33 |
0.15~0.35 |
0.60~0.85 |
≤0.030 |
≤0.030 |
0.90~1.20 |
0.15~0.30 |
SCM435TK |
0.33~0.38 |
0.15~0.35 |
0.60~0.85 |
≤0.030 |
≤0.030 |
0.90~1.20 |
0.15~0.30 |
SCM440TK |
0.38~0.43 |
0.15~0.35 |
0.60~0.85 |
≤0.030 |
≤0.030 |
0.90~1.20 |
0.15~0.30 |
Grade |
Rel(Mpa) |
Rm(Mpa) |
A(%) |
SCM415 |
≥295 |
≥440 |
≥22 |
SCM418 |
≥735 |
≥880 |
≥15 |
SCM420 |
≥685 |
≥885 |
≥12 |
SCM430 |
≥785 |
≥930 |
≥12 |
SCM435 |
≥835 |
≥985 |
≥12 |
SCM440 |
≥930 |
≥1080 |
≥12 |
Size tolerance |
|
|
|
|
|
OD |
Standard tolerance |
Special tolerance |
Outer Diameter |
GB/T3639 |
DIN2391 |
EN10305 |
O D |
thickness |
4mm-20mm |
±0.10 mm |
±0.08 mm |
±0.08 mm |
±0.05mm |
±0.05mm |
20mm-30mm |
±0.10 mm |
±0.08 mm |
±0.08 mm |
±0.08 mm |
±0.08 mm |
31mm-40mm |
±0.15 mm |
±0.15 mm |
±0.15 mm |
±0.10 mm |
±0.08 mm |
41mm-60mm |
±0.20 mm |
±0.20 mm |
±0.20 mm |
±0.15 mm |
±0.15 mm |
61mm-80mm |
±0.30 mm |
±0.30 mm |
±0.30 mm |
±0.20 mm |
±0.20 mm |
81mm-120mm |
±0.45 mm |
±0.40 mm |
±0.40 mm |
±0.30 mm |
±0.30 mm |
Equivalent Material referance: |
GB |
TOCT |
ASTM |
BS |
JIS |
NF |
DIN |
10F |
|
1010 |
040A10 |
|
XC10 |
|
10 |
10 |
10,101,012 |
045M10 |
S10C |
XC10 |
C10,CK10 |
20 |
20 |
1020 |
050A20 |
S20C |
XC18 |
C22,CK22 |
45 |
45 |
1045 |
080M46 |
S45C |
XC45 |
C45,CK45 |
30CrMo |
30XM |
4130 |
1717COS110 |
SCM420 |
30CD4 |
|
42CrMo |
|
4140 |
708A42 |
|
42CD4 |
42CrMo4 |
|
|
|
708M40 |
|
|
|
35CrMo |
35XM |
4135 |
708A37 |
SCM3 |
35CD4 |
34CrMo4 |
Material |
10#-45#, 16Mn, A53-A369, Cr-Mo alloy, Q195-Q345, ST35-ST52, 10#, 20#, 45#, 16Mn, A213, A315, 30CrMo, Q195, Q215, Q235, Q345, ST35, St37, St45, St52 |
Surface |
Black/ Bright |
Standard |
DIN, GB, JIS, DIN 17175, DIN 2391, GB 5310-1995, GB/T 13793-1992, GB/T 3094- 2000, GB/T 8163-1999, JIS G3101 |
Size |
OD 15mm-70mm |
Thickness 1-12mm |
Processing |
Cold rolled/ Cold drawn |
1. BK (+C) No heat treatment after last cold forming process. |
2. BKW (+LC) After last heat treatment there is a light finishing pass ( cold drawing) |
3. BKS (+SR) After the final cold forming process the tubes are stress relieve annealed. |
4. GBK (+A) After the final cold forming process the tubes are annealed in a controlled atmosphere. |
5. NBK (+N) After the final cold forming process the tubes are annealed above the upper transformation point in a controlled atmosphere. |
Packing |
Woven bag/ Wooden or crate carton/ Bundle Packing/ Plain end or vanished as per customer's request. |
Delivery time |
Normally 20-30 working days |
Certifications

FAQ
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.