Sichuan Liaofu Special Steel Company is one of the most experienced manufacturers and suppliers of en 10294-1 grade 20mnv6 carbon steel hollow bars in China. With over 20 years' experience, our factory offer high quality products made in China with competitive price. Welcome to contact us for wholesale service.
Products Description
Table of Content Common types of EN 10294-1 Grade 20MnV6 Hollow bar Chemical Analysis of EN 10294-1 Grade 20MnV6 Carbon Steel Seamless Hollow Bars EN 10294-1 Grade 20MnV6 Mechanical Properties Chart EN 10294-1 Grade 20MnV6 Hollow Bars Equivalent Material
Atlas Carbon Steel Hollow Bar is in accordance with EN DIN 1629/1630 and EN DIN 2448.
Chemical Composition Atlas Carbon Steel Hollow Bar is supplied in two grades. Grade 20MnVS6 (WNr 1.5217) for sizes 32- 250mm and Grade St 52.0 (WNr 1.0421) for all sizes 250-457 mm.
|
Grade |
Chemical Composition % |
|||||||
|
20MnV6 |
C |
Mn |
P max |
S max |
Si |
Ni max |
Cr max |
V |
|
0.17-0.24 |
1.30-1.60 |
0.035 |
0.035 |
0.17-0.37 |
0.30 |
0.30 |
0.07-0.12 |
|
|
Grade |
Chemical Composition % |
|||||||
|
4140 |
C |
Mn |
P max |
S max |
Si |
Ni max |
Cr |
Mo |
|
0.38-0.45 |
0.50-0.80 |
0.035 |
0.035 |
0.17-0.37 |
0.30 |
0.9-1.20 |
0.15-0.25 |
|
Mechanical Properties
Grade min. Delivery Condtion <25 25-50 50-80 <12 12- 25 25- 40 40- 50 50- 65 long transv Test T J min Untreated 650- 800 620- 770 470 470 450 430 17 15 0°C 27 20MnVS6 Q&T 700- 850 650- 800 520- 670 590 570 540 510 480 16 14 -40°C 27 <16 16-40 40-65 <16 16- 40 40- 65 St52.0 Untreated 490-630 355 345 335 17 15 0°C 27
Weldability 20MnVS6 hollow bar can be readily welded using all conventional methods. Welds should be completed without interruption. For fillet welds, a multi-pass technique should be selected. Stress relieving is generally not necessary. In case of WT>12mm preheating to 150-200°C is recommended. St52.0 hollow bar can be readily welded using manual and automatic methods. Preheating and/or stress relieving are generally not required, though may be necessary in the case of WT >30mm. For 20MnVS6 and St52.0 basic welding consumables are recommended.
Product Sales Information
|
Material |
alloy steel 20mnv6 |
|
Size |
OD 22 to 500mm thickness 5to50mm length customized |
|
Origin place |
Made In China |
|
Delivery Condition |
Hot rolled,seamless |
|
Surface require |
Black,grinding,bright,polish |
|
Heat treatment |
Quenched,Tempered,annealed |
|
Packing |
seaworthy packing ,wooden case ,carton,woven bag or at client's requires |
|
Delivery time |
In 10-50 days |
|
Trade Term |
EXW,FOB,CIF |
|
Payments |
T/T or L/C at sight |
|
Port |
China main Port,such as shanghai,Dalian,Shenzhen port. |
|
MOQ |
1 Ton |
some 20mnv6 4140 tube from our factory
FAQ
Q: Why should I choose hollow bars instead of solid bars for machining bushings?
A: Hollow bars save you significant machining time and raw material costs. The central hole is already pre-formed, meaning you only need to finish machine the inner and outer diameters. This reduces your metal cutting time, tool wear, and scrap weight.
Q: Can I substitute 20MnV6 with standard 4140 steel?
A: No, they are different. 20MnV6 is a micro-alloyed steel designed for hollow bars with specific machinability and weldability. 4140 has higher carbon and chromium for through-hardening. Check the mechanical requirements of your final part before substituting. (Substitution approval must be confirmed by your design engineer.)
Q: Do you supply these hollow bars in the untreated or Q&T (Quenched and Tempered) condition?
A: We supply both. Untreated bars are suitable for general machining and later heat treatment. If you need higher strength immediately, we can supply them in the Q&T condition, processed through our qualified partner heat treaters to meet exact yield and tensile requirements.
Q: How do you control the wall thickness eccentricity of the hollow bars?
A: We control the eccentricity tightly during the hot-rolling process at our in-house production base. We inspect the wall thickness at both ends and the middle. Tell us your allowable offset between the inner and outer diameter, and we will confirm if our standard tolerance fits your machining allowance.
Q: What is the welding procedure for 20MnV6 hollow bars?
A: They are easily welded using conventional methods. For thicknesses over 12mm, preheat the material to 150-200°C. Welds should be completed without interruption. Post-weld stress relieving is generally not required, making it highly efficient for structural fabrication.
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