Product Details

Company Information

about our company :

we are the top 5 manufacturer of seamless steel tube in China ,our company established in 1992,so we have more than 20 years experience in the steel tube world .we mainly produces varous specifications cold finished seamless steel tube ,which are widely used in hydraulic cylinder ,automobile ,oil drilling ,textil machinery , engineering machinery ,and so on .we have the advance equipment and best services .so welcome to our company to visting and negotiate business .

Product Description

Dimension	O.D.30-250mm W.T.:2-30mm L: according to the customer’s need
Steel Grade	10#,20#,45#,16Mn, ST35, ST37,ST37.4,ST45,ST52,ST52.4, E255,E355,Q345 etc
Standards	DIN /ASTM /GB/ EN/ etc
Delivery Condition	NBK(+N), GBK(+A), BK(+C) ,BKW(+LC) ,BKS(+SR)
Application	Automotive pipeline system; hydraulic system of diesel engine and engineering machinery; hydraulic system of locomotive, aerospace and aviation, shipbuilding and various machinery; metal processing of wind power equipment;
Surface treatment	According the customer’s acquirements
Packing		We usually bundle with steel strips ,branding parcel or wooden box outside ,or according to the customer’s need
Certificate		ISO 9001:2008
Basic Inspection		Chemical analysis ,mechanical testing, eddy current test and ultrasonic

commodity name : AISI 4140 CDS black seamess steel tube with hone condition for hydraulic cylinder

THE TOLERANCE OF DIMENSION

ID size

ID deviation (mm)

H10

+0.021

+0.033

+0.052

+0.084

>30~50

+0.025

+0.039

+0.062

+0.100

>50~80

+0.030

+0.046

+0.074

+0.120

>80~120

+0.035

+0.054

+0.087

+0.140

>120~180

+0.040

+0.063

+0.100

+0.160

>180~250

+0.046

+0.072

+0.115

+0.185

>250~315

+0.052

+0.081

+0.130

+0.210

>315~400

+0.0527

+0.089

+0.140

THE CHEMICAL COMPOSITION

Final Supply Condition	Cold finished (Hard)(BK)		Cold drawn and stress-relieved (BK+S)			Hardness HB
Parameters	T.S obN/mm 2	Elongation δ5%	T.S obN/mm 2	Y.S OsN/mm 2	Elongation δ5%	Hardness HB
20#	≥550	≥8	≥520	≥470	≥12	175
45#(CK45)	≥650	≥5	≥600	≥520	≥12	207
16Mn(ST52)	≥640	≥5	≥600	≥520	≥15	190
25Mn	≥640	≥5	≥600	≥510	≥15	195
27SiMn	≥840	≥5	≥800	≥720	≥10	230

THE FINISHED PRODUCTS

Our Services

1. Cargo track service during transporting and feedback service after cargo is loaded on board

2. Flexible terms of payment by

3. Big discount for repeat customers

4. Smooth delivering procedure

5. Payment Terms: T/T , L/C And so on.

application

GB/T 8162-2008 Seamless Steel Tubes For Structural Purposes

GB/T 8163-2008 Seamless Steel Tubes For Liquid Service

ASTM A53 It is used for conveying water,petrolem,gas and other common fluids.

ASTM A106 For the purpose of the pipeline project of boiler,water&petroleum.

API SPCE 5L For the purpose of transportation of gas,water,oill in oil&gas industry.

API SPEC 5CT Tubing is used in extracting petroleum & natural gas. casing pipe serves as wall of well.

ASTM A519 Seamless carbon and alloy steel mechanical tubing

A 179/A179M cold drawn low carbon steel heat exchanger and condenser tubes

ASTM A192/A192M for manufacturer wall panel,economizer,reheater,super heater,and the steam pipeline of boilers

DIN 1629 applies to seamless circulal tubes and pipes made of unalloyed steels

DIN17175 Cold Drawn Seamless Tube For Boiler And Heat Exchanger

DIN2391 Cold drawn or cold rolled precision seamless steel tubes for hydraulic pressure

our processing

Packaging & Shipping

packaging details: standard packing with plastic caps and starpped bundles,standard wheight approx 1500Kg

delivery details: 15 days after receiving downpayment or L/C or as your request

FAQ

Q: What about your payment term?

A: Usually T/T or L/C, 30% deposit and 70% before delivery.

Q: what about your standard delivery date

A: 30 days after receiving deposit

Q: How about your capacity?

A: For steel pipes, 500 tons per month, 6000 tons per year.

Q: what about your package

1. bundle packing

2. marking as per customer's requests

3. paint on the pipe as per customer request

4. pipe caps as customer reques

Q: What is your main market &main customers

A: We have 23years experience on steel pipes .Our main market includes China, Korea, Pakistan etc.

Q: If products have some quality problem,how would you deal with?

A: We will responsible for all of our quality problems and we are trade assurance supplier.

Q: How to get accurate price / quotation from you?

A: Please kindly tell us below details and we'll send our quotation to you ASAP:

1) Pipe's outer diameter 2) Wall thickness 3) Section Shape (round, square etc.)

4) length for each pipe 5) steel grade 6) Standard (e.g.: API 5L)

7) order quantity 8) Designation (BK, BKW etc.) 9) Trade Terms

P.S.: more detailed information you clarified, more exact price we provided.