• No.101 Wanbo 1st Road, Nancun Town, Panyu District, Guangzhou, Guangdong, China
  • 0086-020-84886013，84886093，84886091，84886012
  • sales@finegosteel.com
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Stainless Steel Pipe

304 Stainless Steel Pipe

Supplying stainless steel pipe(ss) and various kinds of steel pipe.

Our products are manufactured using high quality materials. Customers can avail this range of products from us in different sizes, lengths, and specifications.

To make sure best quality product delivery, we check our offered products on various quality parameters under the direction of our skillful quality inspectors.

ASTM: a312 tp 304 / 304l / 304h / 316 / 316l / 317 / 317l / 321 / 310 / 347 / 904l etc

Others: duplex, super duplex, monel, nickel, inconel, hastelloy

Types: round, square, rectangular

Size: upto 48” nb. (seamless & welded)

Wall Thickness: sch. 5s to sch. xxs


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Standard

Specification

Grade 304 is the standard "18/8" stainless; it is the most versatile and most widely used material of seamless stainless steel pipes, available in a wider range of products, forms and finishes than any other. It has excellent forming and welding characteristics. The balanced austenitic structure of Grade 304 enables it to be severely deep drawn without intermediate annealing, which has made this grade dominant in the manufacture of drawn stainless parts such as sinks, hollow-ware and saucepans. for these applications it is common to use special "304DDQ" (Deep Drawing Quality) variants. Grade 304 is readily brake or roll formed into a variety of components for applications in the industrial, architectural, and transportation fields. Grade 304 also has outstanding welding characteristics. Post-weld annealing is not required when welding thin sections.


Grade 304L, the low carbon version of 304, does not require post-weld annealing and so is extensively used in heavy gauge components (over about 6mm). Grade 304H with its higher carbon content finds application at elevated temperatures. The austenitic structure also gives these grades excellent toughness, even down to cryogenic temperatures.


Standard

AISI, ASTM, DIN, JIS, BS, NB, GB

Size

Round


Outer Diameter: 4mm-2500mm (3/8"-100")
Thickness: 1mm-150mm(SCH10-XXS)


Square


Outer Diameter: 4mm*4mm-800mm*800mm
Thickness: 1mm-150mm(SCH10-XXS)


Rectangular


Outer Diameter: 4mm-2500mm (3/8"-100")
Thickness: 1mm-150mm(SCH10-XXS)


Length

2m, 3m, 5m, 5.8m, 6m,11.8m, 12m,or as required

Tolerance


1. Outer Diameter: +/- 0.2mm
2. Thickness: +/- 10% OR as customer request
3. Length: +/- 10mm


Surface

Pickling white, Polished outside, Polished inside and outside, Brushed, Mirrored, Plated, Perforated


304 Stainless Steel Pipes and Tubes Range:

304 Stainless Steel Pipe & Tubes Specification

ASTM A269, ASTM A213, ASTM A312, ASME SA269, ASME SA213, ASME SA312

304 Stainless Steel Pipe & Tubes Grades

202, 304, 304L, 304H, 304LN, 309S, 310S, 316, 316L, 316H, 316Ti, 316LN, 317L, 321, 321H, 347, 347H, 904L, SMO 254, ALLOY 254, 6MO, 6MOLY, UNS S31254 ETC.

304 Stainless Steel Pipe & Tubes Type

Seamless / Welded / ERW / EFW / Cold Draw / Hot Finish / Cold Finish

304 Stainless Steel Pipe & Tubes Outer Diameter Size

Seamless - 1/2" NB TO 18" NB
Welded / ERW- 1" NB TO 16" NB
EFW - 8" NB TO 110" NB

304 Stainless Steel Pipe & Tubes Wall Thickness

Schedule 10 to Schedule 160 (3 mm to 100 mm Thickness)

304 Stainless Steel Pipe & Tubes Length

01 Meter to 12.5 Meters, Single Random Length, Double Random Length And Customize Size.

304 Stainless Steel Pipe & Tubes Ends

Plain Ends / Beveled Ends

304 Stainless Steel Pipe & Tubes Delivery Conditions

As Rolled, Formed, Stress Relieved, Annealed, Hardened, Tempered, Cold Draw

304 Stainless Steel Pipe & Tubes Coating

Electropolish, Mechanical Polish, Satin Finish, PassivateD

304 Stainless Steel Pipe & Tubes Other Testing

Product Analysis, Transverse Tension Test, Flattening Test, Etching Test, Radiograph HIC Examination, Stabilizing Heat Treatment, Intergranular Corrosion Test, Weld Decay Test, Magnetic Particle Detection, Grain Size Test, NACE 0175, Dual Grade, PWHT (POST WELD HEAT TREATMENT), Flare Test, Bend Test, Hardness Test, Tensile Test etc

304 Stainless Steel Pipe & Tubes Dimension

All Pipes Is Manufactured and Inspected / Tested to the Relevant standards includingASTM And ASME

304 Stainless Steel Pipe & Tubes Value Added Services

Draw / Expansion / Machining / Sand Blasting / Shot Blasting / Heat Treatment

304 Stainless Steel Pipe & Tubes Packaging

Loose / Bundle / Wooden Pallet / Wooden box-a / Plastic Cloth Wraps / Plastic End Caps / Beveled Protector

304 Stainless Steel Pipe & Tubes Shipment & Transportation

By Road - Truck / Train, By Sea - Break-bulk Conventional Vessel / FCL (Full Container Load) / LCL (Less Container Load) / 20 Feet Container / 40 Feet Container / 45 Feet Container / High Cube Container / Open Top Container, By Air - Freighter Civil Passenger and Cargo Planes

304 Stainless Steel Pipe & Tubes Material Test Certificate

Manufacturer Test Certificate As Per EN10204 3.1, 3.2 / Laboratory Test Certificate From NABL Approved Lab. / Under Third Party Inspection Agency Like SGS, TUV, DNV, LLOYDS, ABS ETC


Chemical Composition of 304 Stainless Steel Pipes and Tubes:

The Chemical Composition of grade 304 Stainless Steel is outlined in the following table

Grade

C

Mn

Si

P

S

Cr

Mo

Ni

N

304

min.

-

-

-

-

-

18.0

-

8.0

-

max.

0.08

2.0

0.75

0.045

0.030

20.0


10.5

0.10

304L

min.

-

-

-

-

-

18.0

-

8.0

-

max.

0.030

2.0

0.75

0.045

0.030

20.0


12.0

0.10

304H

min.

0.04

-

-

-0.045

-

18.0

-

8.0

-

max.

0.10

2.0

0.75


0.030

20.0


10.5



Mechanical Properties of 304 Stainless Steel Pipes and Tubes:

The Mechanical Properties of grade 304 Stainless Steel are displayed in the following table.

Grade

Tensile Strength (MPa) min

Yield Strength 0.2% Proof (MPa) min

Elongation (% in 50mm) min

Hardness

Rockwell B (HR B) max

Brinell (HB) max

304

515

205

40

92

201

304L

485

170

40

92

201

304H

515

205

40

92

201

304H also has a requirement for a grain size of ASTM No 7 or coarser.


304 Stainless Steel Pipes and Tubes Physical Properties:

Physical properties of 304 grade stainless steel in the annealed condition


Grade

Density(kg/m3)

Elastic Modulus (GPa)

Mean Coefficient of Thermal Expansion (μm/m/°C)

Thermal Conductivity (W/m.K)

Specific Heat 0-100°C (J/kg.K)

Electrical Resistivity (nΩ.m)

0-100°C

0-315°C

0-538°C

at 100°C

at 500°C

304/L/H

8000

193

17.2

17.8

18.4

16.2

21.5

500

720


Specification Comparison For Grade 304 Stainless Steel Pipes and Tubes:

Grade Specifications for 304 grade stainless steel

Grade

UNS No

Old British

Euronorm

Swedish SS

Japanese JIS

BS

En

No

Name

304

S30400

304S31

58E

1.4301

X5CrNi18-10

2332

SUS 304

304L

S30403

304S11

-

1.4306

X2CrNi19-11

2352

SUS 304L

304H

S30409

304S51

-

1.4948

X6CrNi18-11

-

-

These comparisons are approximate only. The list is intended as a comparison of functionally similar materials not as a schedule of contractual equivalents. If exact equivalents are needed original specifications must be consulted.


304 Stainless Steel Pipes and Tubes Applications:

The grade 304 steel can be made into plates, sheets, and coils to be used in the following:

  • Food processing equipment, particularly in beer brewing, milk processing & wine making.
  • Kitchen benches, sinks, troughs, equipment and appliances
  • Architectural panelling, railings & trim
  • Chemical containers, including for transport
  • Heat Exchangers
  • Woven or welded screens for mining, quarrying & water filtration
  • Threaded fasteners
  • Springs

Process

According to different production methods, it can be divided into hot rolled tubes, cold rolled tubes, cold drawn tubes, extruded tubes, etc.

1.1. Hot-rolled stainless steel seamless pipes are generally produced on automatic pipe rolling mills. The solid tube is inspected and cleaned of surface defects, cut to the required length, centered on the perforated end of the tube, and then sent to the heating furnace for heating and piercing on the punching machine. When the perforation continues to rotate and advance at the same time, under the action of the roller and the plug, a cavity is gradually formed inside the tube blank, which is called a capillary tube. And then sent to the automated rolling mill to continue rolling. Finally, the whole wall thickness is uniformed for the whole machine, and the diameter is sizing by the sizing machine to meet the specifications. The use of continuous tube rolling mills to produce hot rolled seamless steel tubes is a more advanced method.

1.2. If you want to obtain seamless pipes with smaller size and better quality, cold rolling, cold drawing or a combination of the two methods must be used. Cold rolling is usually carried out on a two-high rolling mill. The steel pipe is rolled in an annular pass formed by a variable cross-section circular hole groove and a stationary tapered plug. Cold drawing is usually carried out on a single-chain or double-chain cold drawing machine of 0.5-100T.

1.3. The extrusion method is to put the heated tube blank in a closed extrusion cylinder, and the perforated rod and the extrusion rod move together to extrude the extruded part of the smaller die hole. This method can produce steel pipes with smaller diameters.

This kind of steel pipe can be divided into two categories: stainless steel seamless steel pipe and stainless steel welded steel pipe (seam pipe). According to the different manufacturing process, it can be: hot-rolled, extruded, cold drawn and cold-rolled. The shape can be divided into round pipes and special-shaped pipes. Round steel pipes are widely used, but there are also some special-shaped stainless steel pipes such as square, rectangular, semicircular, hexagonal, equilateral triangle, and octagonal.

Packing

  • OD 219mm and above Loose + pipe cap + two nylon slings

    OD 219mm and above Loose + pipe cap + two nylon slings

  • OD below 219mm (Bundled) Hexagonal packing + steel belts bundled + pipe cap + woven bags + two nylon slings

    OD below 219mm (Bundled) Hexagonal packing + steel belts bundled + pipe cap + woven bags + two nylon slings

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  • No.101 Wanbo 1st Road, Nancun Town, Panyu District, Guangzhou, Guangdong, China
  • 0086-020-84886013，84886093，84886091，84886012
  • sales@finegosteel.com
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