Cold-Drawn Seamless Tube 9260 9255 55si2mn 56sicr7 Sup6 55si7 60si2mn 60si2mna 60si7 1.0909 Precision Pipe Spring Tube

• Type: Seamless
• Technique: Cold Drawn
• Material: Carbon Steel
• Surface Treatment: Black
• Usage: Pipeline Transport, Boiler Pipe, Hydraulic/Automobile Pipe, Oil/Gas Drilling, Food/Beverage/Dairy Products, Machinery Industry, Chemical Industry, Mining, Construction & Decoration, Special Purpose
• Section Shape: Round
• Model NO.: 260 9255 55Si2Mn 56SiCr7 SUP6 55Si7 60Si2Mn 60Si2M
• Thickness: 4mm-150mm
• Length: 12m
• MOQ: 1 Ton
• Tolerance: ±5%, ±1%
• Delivery Time: 8-14 Days
• Oiled or Non-Oiled: Non-Oiled
• Processing Service: Punching, Bending, Decoiling
• Invoicing: by Actual Weight
• Product Name: Seamless Precision Steel Tube/Pipe
• Packages: Sea Worthy Packaging
• Standard: ASTM GB JIS DIN En
• Transport Package: Customized or Regular Shipping According to Custom
• Specification: OD 4-2420mm
• Trademark: MEIDE
• Origin: Shandong, China
• HS Code: 7304519090
• Production Capacity: 200000 Ton/Tons Per Month

Product Description

Product Description

Cold-drawn precision seamless steel pipe is a kind of high precision steel pipe material. The main categories are: precision seamless steel pipe, precision hydraulic seamless steel pipe, cold-drawn precision seamless steel pipe, cold-rolled precision seamless steel pipe, high precision seamless steel pipe, precision bright seamless steel pipe.
1. Smaller outer diameter.
2. High precision can be used for small batch production.
3. The cold-drawn finished product has high precision and good surface quality.
4. The cross area of steel pipe is more complex.
5. The performance of steel pipe is superior and the metal is dense.

Chemical Composition (%)

Material	C	Si	Mn	P	S	Cr	Ni	CU
9260	0.56-0.64	1.50-2.00	0.60-0.90	0.035	0.035	0.35	0.35	0.25

Mechanical property

Tensile strength σb (MPa)	Yield strength σs (MPa)	Elongation δ10 (%)	Hot rolled	Shrinkage of section ψ (%)	Cold drawing + heat treatment
≥1274(130)	≥1176(120)	≥5	≤321HB	≥25	≤321HB

Heat Treatment

Heat treatment specification.

9260 heat treatment methods include isothermal tempering and fractional quenching, subtemperature quenching, high temperature tempering, deformation heat treatment process. This method can effectively improve the strength, toughness and service life of 60Si2Mn spring steel.

Quenching 870ºC±20ºC, oil cold; Temper 480ºC±50ºC(for special needs,±30ºC).

Heat treatment technology.

Spheroidizing annealing: The ideal spheroidizing structure can be obtained by 850 ° C heating, oil cold quenching, short time isothermal spheroidizing process (790 ° C heating 25Min, rapid cooling to 680 ° C heat preservation 1H, furnace cooling to 500 ° C heat extraction). The normal quenching temperature of 60Si2Mn steel is 850 degrees ~870 degrees, and the oil is cold. Tempering temperature depends on the hardness requirements of die parts, such as 400 degrees tempering, hardness 46HRC; 500 degrees tempering, hardness 40HRC; 600 degrees temper, hardness 34HRC. In 150~160 degrees of tempering performance to get the best match, attention must avoid 300 degrees of tempering brittle area. The requirements of high toughness of the mold, the requirements of good dimensional stability of measuring tools, tempering temperature can be raised to about 250 degrees, hardness of 55~60HRC, has better toughness. AC1-755, Ac3=810, Ar1=700,Ar3=770,Ms-300 ~ 305, Annealing: 750C- furnace cooling -HBS≤222 Normalizing: 830 ~ 860C- Air cooling -HBS≤302 Quenching: 870C-oil-HRC> 61 Hardness of tempered at different temperatures HRC: 150C-61,200 C-60, 300C-56, 400 C-51,500 C-43, 550C-38, 600C-33, 650C-29 Commonly used tempering temperature 430 ~ 480C, water or air, HRC45 ~ 50 The following are the parameters of automobile leaf spring heat treatment Quenching heating holding time is related to thickness: mm/min, 6.5/2, 8/3, 8.5-10/4, 12/5 Tempering holding time is related to thickness: mm/min, < 10/25-30, 10-15 30-35, 15-20/40-45, 20-25/45-50.
Metallographic structure.

Tempered tretinite.
Delivery status.
Hot-rolled steels are delivered in heat-treated or non-heat-treated condition and cold-drawn steels are delivered in heat-treated condition. Hot rolled delivery specifications: 2.0~18.0mm, annealed and non annealed state. Cold rolled delivery specification: 0.3~4.3mm,

Product specification

Specification: outer diameter of hot-rolled pipe is 32~630mm. The wall thickness is 2.5~75mm. The outer diameter of cold rolled (cold drawn) pipe is 5~200mm. The wall thickness is 2.5~12mm.
Appearance quality: the internal and external surfaces of steel pipes shall be free of cracks, folds, folds, delamination, hairlines and scabs. These defects shall be completely removed, and the wall thickness and outer diameter shall not exceed the negative deviation after removal.
Both ends of the steel pipe shall be cut at right angles and the burrs shall be removed. Gas cutting and hot saw cutting are allowed for steel pipes with wall thickness greater than 20mm. The head may not be cut after the agreement between the supplier and the supplier.

product application

Seamless pipes are widely used. Seamless pipes for general purposes are rolled by ordinary carbon structural steel, low alloy structural steel or alloy structural steel, with the largest output, and are mainly used as pipes or structural parts for conveying fluid.
Supply is divided into three types according to different purposes: a. Supply according to chemical composition and mechanical properties; B. Supply according to mechanical properties; C. Supply according to hydraulic test. The steel pipes supplied according to category a and b shall also be subjected to hydraulic test if they are used to bear liquid pressure.
There are many kinds of seamless pipes for special purposes, such as boiler seamless pipes, geological seamless pipes and petroleum seamless pipes.

FAQ

Q1:who are we?

A:We are based in Shandong, China, start from 2022,sell to North America(60.00%),Western Europe(14.00%),South America(6.00%).
There are total about 11-50 people in our office.

Q2. how can we guarantee quality?
A:Always a pre-production sample before mass production;
Always final Inspection before shipment;

Q3.what can you buy from us?Which ports are accepted for delivery?
A:Copper,Aluminum,Mould steel, Seamless carbon steel,Precision steel pipe,The steel plate,Alloy steel,Titanium,Custom machine parts.It can be delivered from Qingdao, Tianjin, Shanghai, Guangzhou and other ports.

Q4.why should you buy from us not from other suppliers?
A:Shandong Meide Import and Export Co., Ltd. has 25 years of production experience. With advanced precision production equipment
and modern large warehouses, has a stockpile of 200,000 tons of goods, has a number of long-term stable cooperative customers.

Q5.what services can we provide?
A:Accepted Delivery Terms: FOB,CFR,CIF,EXW;
Accepted Payment Currency:USD,EUR,JPY,CAD,AUD,HKD,GBP,CNY,CHF;
Accepted Payment Type: T/T,L/C,D/P D/A,PayPal;
Language Spoken:English,Chinese

Q6.Can we get the some samples?Any charges?
A:Yes,you can get available samples in our stock.Free for real samples,but customers need to pay the freight cost.

Q7.How can we get your price ?
A:We need below information to quote for you:
1). Product Name
2). Standard
3). Material Grade (Chemical Composition)
4). Dimension
5). Quantity
6). The Drawing for Special Parts