Zhejiang Guanyu Stainless Steel Tube Co., Ltd  
  Directory | Useful Tool | Sitemap | Contact US | Home

         

Properties

Seamless Steel Tube Manufacturing Process








1. Hot rolled extrusion seamless steel pipe: Round Tube > 3 > heating > perforated roller rolling, rolling or extrusion > > set off pipe diameter (or reducing) > cooling > > straightening pressure test or testing > mark > storage

2. Cold drawn (rolled) seamless steel pipe: round tube perforation > heating > > > Heading > pickling > oiled annealing copper > multi-pass cold drawn > Preform > heat treatment > Straightening > hydraulic pressure test testing > mark > storage

Mechanical Properties

Mechanical properties of steel is to ensure that end-use properties of steel mechanical properties of the key indicators, it depends on the steel's chemical composition and heat treatment. In the steel standards, based on different usage requirements to the tensile strength properties tensile strength, yield strength or yield point, elongation and hardness, toughness index, as well as users demand high and low temperature capabilities. 

i. Tensile strength

Sample in the tensile process, the pull off the most vigorously when exposed (Fb), out to sample the original cross-sectional area (So) from the stress , called the tensile strength , units N/mm2 (MPa). It said the role of metal material in the tensile resistance to failure under the maximum capacity. The formula is:

Type in: Fb pull off when the sample exposed most strongly, N Newton; So the original specimen cross-sectional area, mm2. 



ii. Yield point

Yielding of metal materials with the specimen during the tensile force does not increase (remain constant) could continue to stretch the stress, called yield point. If the drop occurs when the force should distinguish between the upper and lower yield point. Yield point of the unit N/mm2 (MPa).

The yield point : sample occurred before the first drop power yield and maximum stress; lower yield point : When excluding the initial transient effect, the yield phases of minimum stress.

Yield point is calculated as:

The formula: Fs - the process of tensile yield strength (constant), N (Newton) So - the original specimen cross-sectional area, mm2. 

iii. Elongation

In tensile testing, fractured by the increase in its gauge length and the percentage of the original gauge length, referred to as elongation. With that as%. The formula is:

The formula: L1 - fractured the gauge length, mm; L0 - the original specimen gauge length, mm. 

vi. section shrinkage

In the tensile test, the fractured cross-sectional area of its necking Department to reduce the maximum amount of the percentage of the original cross-sectional area, known as section shrinkage. To that as%. Calculated as follows:

Type in: S0 - the original specimen cross-sectional area, mm2; S1 - fractured necking Department at least cross-sectional area, mm2. 

v. hardness index

The hard metal object against the surface of the capacity of indentation, known as the hardness. According to different test methods and scope of application, can be divided into Brinell hardness, Rockwell hardness, Vickers hardness, Shore hardness, microhardness and high temperature hardness. Commonly used for the pipe are Brinell, Rockwell, Vickers hardness of three.

A, Brinell hardness (HB)

With a certain diameter carbide ball or a ball, to provide the test force (F) onto the pattern surface, removable by the provisions of time after the test force, indentation diameter measurement surface of the sample (L). Brinell hardness test force is obtained by dividing the indentation of spherical surface area business. With HBS (ball) that, in units of N/mm2 (MPa).

The formula is:
The formula: F - pressed into the metal surface of the sample test force, N; D - test with steel ball diameter, mm; d - the average diameter of indentation, mm.

More accurate and reliable determination of Brinell hardness, but in general HBS is only applicable to 450N/mm2 (MPa) below the metal material, the harder the steel or thin sheet does not apply. Standards in the steel, Brinell hardness most widely used and often indentation diameter d to represent the hardness of the material, both intuitive, and convenient.

For example: 120HBS10/1000130: 10mm diameter, said steel ball in 1000Kgf (9.807KN) Test Forces maintain 30s (seconds) measured Brinell hardness value of 120N / mm2 (MPa).

seamless steel weight formula

Seamless steel tube weight kg / m = (Od - Wt) * Wt * 0.02466 which is the outer diameter Od is the wall thickness Wt
Seamless process

Sanitary Mirror Tube Process:

Tube - Inspection - Skinning - Testing - Heating - perforation - Pickling - grinding - dry lubricant - welding head - cold drawn - solution treatment - Pickling - Pickling Passivation - test - cold - to oil - the first cut - dried - in polish - outside polished - test - identification - product packaging

Industrial Management Process

Tube - Inspection - Skinning - Testing - Heating - perforation - Pickling - Revised mushrooms - dry lubricant - welding head - cold drawn - solution treatment - Pickling - Pickling Passivation - test
Seamless steel pipe dimensions and tolerances
   Stainless Steel Tubing, Nickel Alloy Tubing, Brass Alloy Tubing, Copper Nickel Pipe Material Grades


TubingChina.com All Rights Reserved

Directory | Standard | Heat | Heat Exchanger | Temperature | Pressure | Corrosion | Hardness | Surface | Properties | Select Stainless Steel | Contact US

Useful Tools:

Stainless Steel Weight Calculator
Metals Weight Calculator
Nickel Alloy Weight Calculator
Copper Brass Alloy Weight Calculator
Copper Brass Alloy Sheet Plate Weight Calculator
Sheet Plate Weight Calculator
Hardness Conversion Calculator
Hardness Conversion Chart
Rockwell Brinell Vickers Shore Hardness Conversion Chart
Conversion Calculator
Length Weight Temperature Volume Pressure Calculater
Pipe Working Pressure Calculator
Pressure Conversion Converter
Round Bar Size Calculator
Gauge Sizes
Sheet Metal Gauge
Pipe Schedule
Nominal Pipe Size
ANSI Pipe Chart
Inch to mm Chart
Stainless Steel Pipe Sizes
Stainless Steel Tubing Sizes Chart
Stainless Steel L H Grade
Stainless Steel Density
Conversion of Stainless Steel
Nickel Alloy Grades Comparison Material Grade Chart Carbon Steel
Structural Steel Comparison Chart



Main Products:

BA Tube | AP Tube
Condenser Tubes Tubing
Stainless Steel Reheater Tube Superheater Tubes
Stainless Steel U bend Tube
Nickel Alloy U bend Tubes
Copper Alloy U Bend Tubes
Heat Exchanger Tube
Super Duplex Pipe
Nickel Alloy Tube
Brass Alloy Tubing
Copper Nickel Alloys Tubes
Stainless Steel Hollow Tube
Stainless Steel Oval Tubing
Stainless Steel Square Tubing
Stainless Steel Rectangular Tubing
Stainless Steel Capillary Tube
Duplex Stainless Steel Pipe
Seamless Stainless Steel Tubing
Corrugated Stainless Steel Tubing
Stainless Steel Twisted Tube
Polishing Stainless Steel Tubing
Stainless Steel Aircraft Tube
Stainless Steel Hydraulic Tubing
Stainless Steel Instrumentation Tubing
Stainless Steel Angle Iron Bar
Stainless Steel Mechanical Tube
Bright Annealing Stainless Tube
Heat resistant Stainless Steel
Stainless Steel Welded Pipe
Extruded Serrated Finned Tubes Integral Finned Tubes / Extruded Aluminum Finned Tubes
Brass Alloys Copper Nickel Alloy Integral Low Finned Tubes
HFW High Frequency Welded Helical Spiral Serrated Finned Tubes
Corrosion Resistant Stainless Steel
Corrosion Resistance Stainless Steel

Stainless Steel Tubing Pipe

304 Stainless Steel Pipe
304L Stainless Steel Pipe
304H Stainless Steel Pipe
304/304L Stainless Steel Tubing
309S Stainless Steel Pipe
310S Stainless Steel Pipe
316L Stainless Steel Tubing
316Ti Stainless Steel Tube
317L Stainless Steel Pipe
321 321H Stainless Steel
347 347H Stainless Steel
904L N08094 Seamless Tubes
17-4 PH 630 UNS S17400 Stainless Steel
253MA S30815 Stainless Steel Tube
S31254 254 SMO Pipe
S31803 Stainless Steel
2205 Duplex Pipe Tubing
S32101 Stainless Steel
S32304 Stainless Steel
2507 Super Duplex Pipe
S32750 Super Duplex Pipe
S32760 Super Duplex Steel
1.4462 Stainless Steel Pipe
ASTM A213 | ASTM A269
ASTM A312 | ASTM A511
ASTM A789 | ASTM A790
ASTM B161 / ASME SB 161 | ASTM B111
EN 10216-5
ASTM A789 ASME SA 789 S31803 S32205 S32101 S32750 S32760 S32304 S31500 S31260 Seamless Tubes
EN 10216-5 1.4462 1.4362 1.4162 1.4410 1.4501 Seamless Tubes
Nickel Alloy Tubing:

UNS N08020 Alloy 20 Tubing
UNS N02200 Alloy 200 Tube
UNS N02201 Alloy 201 Pipe
UNS N04400 Monel 400 Tubing
N06600 Inconel 600 Tube
N06601 Inconel 601 Tubing
N06625 Inconel 625 Tubes
N08800 Incoloy 800 Tube
N08810 Incoloy 800H Tube
N08811 Incoloy 800HT Tubing
UNS N08825 Incoloy 825 Pipe
ASTM B622 N10276 C276 Tubing
ASTM B622 N06022 Hastelloy C-22 Alloy Tubes
C28000 Brass Seamless Tubes C44300 Brass Seamless Tubes
C68700 Brass Seamless Tubes
C70600 Copper Nickel Tubes
C71500 Copper Nickel Tubes
DIN 2391 Seamless Precision Steel Tubes
EN 10305-1 E215 E235 E355 Seamless Precision Steel Tube Tubing Tubes
DIN 2393 St28 St34.2 St37.2 St44.2 St52.3 Welded Precision Steel Tubes
EN 10305-2 E195 E235 E355 Welded Cold Drawn Precision Steel Tube