4130 30crmo chromly Бесшовные толстостенные трубы труба OD16mm OD12mm как бочка пневматическая

4130 30CrMo chromly seamless thick wall tube OD16mm OD12mm as barrel air rifle pipe

Major OD 16mm and 12mm others also available

Tube size can be designed as per customers requirements 

Best hardness and machining ability

SIZE: 

Outer Diameter: 1.5mm-60mm

Wall Thickness: 0.3mm to 10mm

Certificates:

According to EN 10204 3.1 

Inspection Items: Tensile stength, Yield stength, Elongation, Flattenging, FlaringChemical analysisEddy Current 

Test 100%, Size and surface checking 100%Other test item can be arranged as per request

DELIVERY CONDITIONS:

The tubes can be produced in the following delivery conditions: 

BK (+C) Cold finished/hard (cold finished as drawn).

No heat treatment after the last cold forming process.

BKW (+LC) Cold finished/soft (lightly cold worked)

After the last heat treatment there is a light finishing pass (cold drawing).

BKS (+SR) Cold finished/stress relieve annealed. 

After the final cold forming process the tubes are stress relieve annealed.

GBK (+A) Annealed. 

After the final cold forming process the tubes are annealed in a controlled atmosphere.

NBK (+N) Normalized. (Mainly focus on)

After the final cold forming process the tubes are annealed above the upper transformation point in a controlled atmosphere

 Some samples of related steel grade

Other grades also availabe upon customer's request and market situation

 SURFACE TREATMENTS

1. Bare Tube (No coating): Bright and smooth, Surface Roughness both inner and outer surface  0.2Ra Maximum for special requirement

2. Surface Coating

A. Silver galvanized

B. Yellow galvanized

C. Olive green coated

Layer thickness: 8-20um, Salty Spray Test: 48-150 hours

3. Black phosphate

Steel bar from steel plant→Physical and chemical inspection→Surface treatment →Cutting → Heating→Hot piercing→Shell storage→Pickling and lubrication→Cold rolling→Heattreatmen  →Pickling and lubrication→Cutting→Punching→Cold drawn→Size inspection→Outer and inner surface cleaning→NBK or GBK→Mechanics inspection→Chemical analysis

Antlrust oil palnting→print→packing→flnished storage→Dellivery with quality certificate

1.We adopt special techniques and special skill in the acid cleaning process to deal with the   place where it's easy to form fold crevice;
2.Well organized process,especially annealing treatment in a severely technical manner;
3.In respect with lubrication,we adopt the international advanced level treating process in the  world,and put the surface quality of our productsunder strict control in order to prevent causing surface crack.

Enployees: 80 people Registed

capital: 8200000RMB

Annual sales around: 60000000RMB

Monthly output: 400Ton

Factory Area: around 7000 sq meters

Production equipments:

Cold draw lines

Two heat treatment lines

Straightening lines

Polish machine

Cutting machines

Others

Hydraulic universal test machine for test tensile strength, yield points, flaring, flattening and elongation

C, S, Si, Mn,P analyse equipment

Hardness test machine

Metallographic analyzer

Eddy current and ultrasonic Non-destruction Test Machine

Visaul inspection bench

100% eddy current test

100% size and surface checking

1.Q: Can you provide a free sample to check the quality ?
 A: Free sample depends on the requiremenrts like sample   size,quantity,mechancialperformance and others in detail
 
2.Q: How can I get the sample ?
 A: The sample will be sent to you via international express and arrive in 3-5 days.Customers should cover the express charges

3.Q: How about your capacity?
 A: Seamless pipes:500Ton/Month

4.Q: Could the tube be customized for us?
 A: Yes.

5.Q: What are your terms of payment?
 A: 30% to 50% T/T down payment balance T/T before shiment.Derail needs for  checking.

6.Q: May I visit your factory?
 A: Wellcome to visit our factory anytime.

7.Q: How can I get the quotation A.S.A.P?
 A: Send us an inquiry with full detail as followings,quotation will be sent to you     A.S.A.P.
  a,Steel grade;
  b,Process standard;
  c,Order quantity;
  d,Trade terms;

8.Q: How about the minum order quantity?
 A: Normally for one size above 1ton,but it depends on the real   situation.

Packaging workshop

Packaging is the ultimatee of product quality .we establish strict packaging quality

management system to improve packaging quality of products continuously and pack
products strictly in accordance with packaging standars and customer requirements.