Commodity name:Astm a519 standards sizes carbon hollow seamless steel tube
1.Grade:20#(ck20,aisi1020),45#(ck45,aisi1045),st52(16Mn,Q345D),25Mn(STKM13C-T),27SiMn
2.ID:30-250mm
3.ID tolerance:H8,H9
4.Surface roughness:Ra 0.02— 0.4μm
5. Final supply condition:cold drawn and stress-relieved(BK+S)
6. Machining allowance:0.5-1.5mm
7.Wall thickness:10%×ID
Variety
Processing | Cylinder Diameter | Straightness | Size Accuracy | W.T/mm | Inner Bore Roughess |
Cold drawn | ID30-250 | 0.3 | H9-H11 | ±10% | 0.4~1.6um |
Honed tube | ID50-250 | 0.3 | H7-H9 | ±10% | <0.4um |
Mechanics performance
Material | Tensile strength | Yield strength | Elongation | Hardness |
Ck20/20#/AISI1020 | >520 N/ mm2 | >375 N/mm2 | >15% | >85HB |
Ck45/45#/AISI1045 | >600 N/ mm2 | >520 N/ mm2 | >15% | >85HB |
ST52/16Mn/Q345D | >600 N/ mm2 | >520 N/ mm2 | >15% | >85HB |
25Mn/STKM 13C-T | >600 N/ mm2 | >530 N/ mm2 | >15% | >85HB |
1.Transportation: By Sea
20' FCL (means the length than 5,800mm)
40' FCL (means the length than 11,800mm)
2.Bulk cargo (means the quantity is more than 200MT)
3.With regards to other length or quantity, it should be taken by clients themselves
4.Delivery time: 25-35days to the dispatch port after receipt of T/T or L/C at sight.
5.Optional: wooden box; caps; vanished coating.
6.Payment: T/T or L/C at sight, T/T 100% in advance (If order less than 3MT)
7.Price item: FOB, CFR, CNF, C&F, CIF
8.Origin: China
9.Third party inspection: BV, SGS, Lloyds. The Expense needs to stand by clients.
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1. 24hours service via phone ,wechat alibaba trade manager.
2. Good package and best container method.
3. Professional explanation with professional online service
4. Factory manufacturer can assure the best quality.
5. Good delivery time as 15-30 days .
6. 3 years product assurance after usuage.
7. Good quality process in our own factory,
each lot tube have their own 5 years'life card.
we always do our best to make deal with any clients, welcome to inquiry at any time!
1.Are you a trading company or manufacturer?
We are the professional manufacturer of precision seamless steel pipe since the year 1992.
2. How can I get the price?
We usually quote within 24 hours after we get your inquiry by telling us the material, out diameter,
wall thickness length, quantity and application of the steel pipe which you need.
If you are very urgent to get the price.
please inform us in email so that we will regard your inquiry priority.
3. How can I get a sample to check your quality?
After price confirmation, you can require for samples to check our quality. we will provide you
the sample for free, however we could only make sure the same material, the dimension will be
much similar as your request but not same.
And customer should afford the charge of shipment.
4. What about the lead time for mass production?
Honestly, it depends on the order quantity and the season you place the order.
if normal order 25-30days.
5. What is your terms of delivery?
We accept FOB CIF EXW CFR.