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EN 10296-2

EN 10296-2

The EN 10296-2 standard-compliant stainless steel welded tubes find extensive applications in European mechanical and general engineering sectors. This standard ensures that the tubes meet stringent requirements for mechanical properties, dimensional tolerances, and surface finish, thereby guaranteeing reliability and performance across various industrial environments such as construction, automotive, and chemical processing industries.

Available Grades and Chemical Requirements

Available Grades and Chemical Requirements

Steel grade

C

Si

Mn

P

S

Cr

Mo

Ni

Cu

N

Nb

Ti

Steel name

Steel number

max

max

max

max

max

Austenitic steels

X5CrNi18-10

1.4301/304

0.070

1.00

2.00

0.045

0.015ᵃ

17.0-19.5

-

8.0-10.5

-

≤0.11

-

-

X2CrNi18-9

1.4307/304L

0.030

1.00

2.00

0.045

0.015ᵃ

17.5-19.5

-

8.0-10.5

-

≤0.11

-

-

X2CrNiMo17-12-2

1.4404/316L

0.030

1.00

2.00

0.045

0.015ᵃ

16.5-18.5

2.0-2.5

10.0-13.0

-

≤0.11

-

-

X6CrNiTi18-10

1.4541/321

0.080

1.00

2.00

0.045

0.015ᵃ

17.0-19.0

-

9.0-12.0

-

-

-

5xC - 0.70

Austenitic ferritic steels

X2CrNiMoN22-5-3

1.4462/Duplex 2205

0.030

1.00

2.00

0.035

0.015

21.0-23.0

2.5-3.5

4.5-6.5

-

0.10-0.22

-

-

X2CrNiMoN25-7-4

1.4410/Duplex 2507

0.030

1.00

2.00

0.035

0.015

24.0-26.0

3.0-4.5

6.0-8.0

-

0.24-0.35

-

-

Ferritic steels

X2CrTi12

1.4512/409L

0.030

1.00

1.00

0.040

0.015

10.5-12.5

-

-

-

≤0.030

-

6x(C+N) - 0.65

X6Cr17

1.4016/430

0.080

1.00

1.00

0.040

0.015ᵃ

16.0-18.0

-

-

-

-

-

-

X3CrTi17

1.4510/439

0.050

1.00

1.00

0.040

0.015ᵃ

16.0-18.0

-

-

-

-

-

4x (C+N)+0.15 - 0.80ᵇ

ᵃ Option 4: a controlled sulfur content of 0,015 % to 0,030 % is specified.

ᵇ Stabilisation may be applied by the use of titanium or niobium or zirconium. According to the atomic number of these elements and the content of carbon and nitrogen, the equivalence shall be the following: Ti ≈ 7/4 Nb ≈ 7/4 Zr.

Mechanical properties for tubes made from ferritic or austenitic or austenitic-ferritic corrosion resistant steels in thicknesses ≤ 30 mm

Mechanical properties for tubes made from ferritic or austenitic or austenitic-ferritic corrosion resistant steels in thicknesses ≤ 30 mm

Steel Grade
Resistance to intergranular corrosion ᵃ
Proof strength
min
MPa *)
Tensile strength
min
MPa*)
Elongation A
min
%
Steel Name
Steel Number
Rₚ₀,₂
Rₚ₁,₀
Rₘ
l ᵇ
Tᵇ
Austenitic steels
X5CrNi18-10
1.4301/304
195
230
500
40
35
Yes ᶜ
X2CrNi18-9
1.4307/304L
180
215
470
40
35
Yes
X2CrNiMo17-12-2
1.4404/316L
190
225
490
40
30
Yes
X6CrNiTi18-10
1.4541/321
200
235
500
35
30
Yes
Austenitic -ferritic steels
X2CrNiMoN22-5-3
1.4462/Duplex 2205
450
700
22
-
Yes
X2CrNiMoN25-7-4
1.4410 /Duplex 2507
550
800
15
Yes
Ferritic steels
X2CrTi12
1.4512/409L
210
220
380
25
23
No
X6Cr17
1.4016/430
240
250
430
20
18
Yes ᶜ
X3CrTi17
1.4510/439
230
240
420
23
21
Yes
*) 1 MPa = 1 N/mm ²
ᵃ When tested in accordance with EN ISO 3651-2.
ᵇ l = longitudinal, t = transverse
ᶜ Normally not fulfilled in the sensitized or as-welded condition.

Tolerances

Tolerances

Tolerances on outside diameter and wall thickness
Outside diameter D mm
Tolerance on outside diameter (D)
Tolerance on wall thickness T
Tolerance class
Permissible deviation
Tolerance class
Permissible deviation
D ≤ 168,3
D3
± 0,75 % or ± 0,3 mm, whichever is the greater
T3
± 10 % or ± 0,2 mm, whichever is the greater
Option 10
± 0,5 % or ± 0,15 mm, whichever is the greater
D> 168,3
D2
± 1,0%
Option 10 Tubes of specified outside diameter ≤ 114,3 mm shall be supplied with a tolerance, including ovality.
Maximum height of the weld seam
Dimensions in millimetres
Weld finish
Maximum height of the weld seam
T ≤ 8
T > 8
Finish A
(0,20) T + 0,5
T /3
Finish B for D ≤ 114,3 mm
(0,06) T +0,3
-
Finish B for D > 114,3 mm
(0,05) T + 0,5
T /6
Finish C
0,15
-
Tolerances on length
Dimensions in millimetres
Type of length
Length L
Tolerance
Standard
6 000
+100
0
Random
Length range by agreement
Exact
≤ 6 000
+5
0
6 000 < L ≤ 12 000
+10
0
>12 000
0 / + by agreement

Summary of inspection and testing

Summary of inspection and testing

Types of inspection or test

Non-specific inspection and
testing

Specific inspection
and testing

Mandatory tests

Cast analysis

Manufacturers
procedure

1/cast

Tensile test

Manufacturers
procedure

1/test unit

Flattening test ᵃ

Manufacturers
procedure

1/test unit

Drift expanding test ᵃ ᵇ

Manufacturers
procedure

1/test unit

Bend test (full tube  section) ᵃ

Manufacturers
procedure

1/test unit

Ring tensile test ᶜ

Manufacturers
procedure

1/test unit

Weld bend test ᶜ ᵈ

Manufacturers
procedure

1/test unit

Dimensional inspection

Visual examination

Material identification

individual

individual

Optional tests

Leak tightness test

Not applicable

individual

Non-destructive test of weld

Not applicable

individual

ᵃ   The choice of flattening, drift expanding or bend test (full tube section) is at the discretion of the manufacturer.

NOTE   The bend test (full tube section) is only applicable for outside diameters ≤ 65 mm. The flattening and drift expansion test are only applicable for outside diameters ≤ 150 mm.

ᵇ   The test shall not be carried out on tubes with specified elongation values less than 15 %.

ᶜ   The choice of ring tensile test or weld bend test is at the discretion of the manufacturer. 

ᵈ   One root and one face test.

Process route and surface conditions

Process route and surface conditions

Symbol ᵃ
Process route ᵇ
Surface condition
W0 ᶜ
Welded from hot or cold rolled plate, sheet or strip 1D, 2D, 2E, 2B
As welded
W1 ᶜ
Welded from hot rolled plate, sheet or strip 1D, descaled
Metallically clean
W1A ᶜ
Welded from hot rolled plate, sheet or strip 1D, heat treated, descaled
Metallically clean
W1R ᶜ
Condition W1 + heat treatment under controlled atmosphere
Metallically bright
W2 ᶜ
Welded from cold rolled plate, sheet or strip 2D, 2E, 2B, descaled
Metallically clean
W2A ᶜ
Welded from cold rolled plate, sheet or strip 2D, 2E, 2B, heat treated, descaled
Except for the weld, essentially smoother than for types W1 and W1A
W2R ᶜ
Welded from cold rolled plate, sheet or strip 2D, 2E, 2B, bright heat treated
Metallically bright
WCA
Welded from hot rolled or cold rolled plate, sheet or strip 1D, 2D, 2E, 2B, heat treated if appropriate, at least 20 % cold formed, heat treated, with re-crystallized weld metal, descaled
Metallically clean, weld scarcely recognizable
WCR
Welded from hot rolled or cold rolled plate, sheet or strip 1D, 2D, 2E, 2B, heat treated if appropriate, at least 20 % cold formed, bright heat treated, with re-crystallized weld metal
Metallically bright, weld scarcely recognizable
WG
Ground ᵈ
Metallically bright-ground, the type of grinding and degree of roughness shall be agreed at the time of enquiry and order ᵉ
WP
Polished ᵈ
Metallically bright-polished, the type of polishing and degree of roughness shall be agreed at the time of enquiry and order ᵉ
ᵃ The symbols W0, W1 and W2 are not applicable to ferritic steels.
ᵇ Symbols of flat products according to EN 10088-2.
ᶜ For tubes ordered with smoothed welds ("bead worked"), the letter “b” shall be appended to the symbol for the type of condition (e.g. W2Ab).
ᵈ Conditions W2, W2A, W2R, WCA or WCR are usually used as the starting condition.
ᵉ The enquiry and order shall indicate whether the requirements for grinding or polishing applies only to the internal or external tube surface, or both the internal and external surfaces.

Relationship Product

Typical Chemical Composition %

Typical Mechanical Properties

ASTM A554 Wall Thickness/Outside Dimention Tolerances

Wall Thickness Tolerances
± 10% of specified wall thickness

APPLICATIONS

CONSTRUCTION
CONSTRUCTION
EN 10296-2 stainless steel tubes are designed for use in mechanical and general engineering purposes. They are particularly relevant in the construction industry due to their corrosion resistance, strength, and aesthetic appeal. Here's a brief overview of their applications within construction: Structural Components: These pipes are used as structural elements in buildings and architectural projects due to their durability and load-bearing capabilities. Decorative Features: Their appealing surface finish is ideal for decorative applications, such as handrails, balustrades, and facade cladding. Support Frameworks: Commonly utilized as support columns or beams, they provide stability and resistance against environmental factors like weather or pollution. Plumbing Systems: Used for water and gas supply lines because they do not corrode easily, reducing maintenance costs and increasing longevity. HVAC Systems: Their resistance to temperature changes makes them suitable for heating, ventilation, and air conditioning systems. Exhaust and Ventilation Ducts: The anti-corrosive properties of these pipes ensure they can handle moisture and varying temperatures without degrading. Green Building Requirements: Stainless steel is often chosen for its sustainable properties, being 100% recyclable and having a lower environmental impact over its life cycle. In the construction industry, EN 10296-2 stainless steel tubes blend functionality with aesthetics, providing long-lasting and maintenance-friendly solutions for a variety of building needs.
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AUTOMOBILE EXHAUST TUBE
AUTOMOBILE EXHAUST TUBE
EN 10296-2 stainless steel tubes, which are specifically tailored for mechanical and general engineering purposes, find an important application in the automotive industry as exhaust tubes. Their key properties and uses in this context are as follows: Corrosion Resistance: These pipes offer excellent resistance to the corrosive gases and acidic conditions present in exhaust emissions, extending the lifespan of the exhaust system. Heat Resistance: Stainless steel can withstand the high temperatures associated with exhaust gases without losing structural integrity. Durability: The robust nature of stainless steel ensures that the exhaust tubes can endure the mechanical stress and vibrations of daily vehicle operation. Mandrel Bending: EN 10296-2 pipes can be precision-bent into complex shapes without compromising their strength, which is essential for creating efficient exhaust pathways. Aesthetic Appeal: Stainless steel has a sleek appearance that is favored for visible exhaust components in high-end or performance vehicles. The use of EN 10296-2 stainless steel tubes in automobile exhaust systems contributes to better overall vehicle longevity, performance, and emissions control, in line with stringent automotive standards and environmental regulations.
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CHEMICAL ENGINEERING
CHEMICAL ENGINEERING
In the realm of chemical engineering, EN 10296-2 stainless steel tubes are highly valued for their exceptional properties, making them indispensable for various applications. Their main uses in chemical engineering include: Chemical Transfer Lines: These pipes are utilized for conveying a wide range of chemicals. Their corrosion resistance ensures the safe transport of aggressive substances without degradation. Process Piping Systems: EN 10296-2 pipes form the backbone of process piping in chemical plants, handling fluids at various temperatures and pressures while maintaining integrity. Heat Exchangers: Given their excellent thermal resistance, these stainless steel tubes are used in heat exchangers to efficiently transfer heat between different chemical substances without cross-contamination. Reactor Vessels and Piping: The robustness of stainless steel against high temperatures and pressures makes these pipes ideal for reactor vessels and related piping systems in chemical reactors. Waste Treatment Systems: In the management and treatment of chemical waste, these pipes ensure that highly corrosive effluents are safely contained and transported, minimizing environmental impact. Fluid Distribution Networks: They are key components in the distribution networks for gases and liquids within chemical plants, offering reliability and leak-proof properties. Evaporators and Condensers: Their resistance to scaling and fouling under varying temperatures makes them suitable for use in evaporators and condensers. By leveraging the properties of EN 10296-2 stainless steel tubes, chemical engineering processes benefit from enhanced safety, efficiency, and durability, contributing to more sustainable and cost-effective operations.
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BATHROOM HARDWARE
BATHROOM HARDWARE
EN 10296-2 stainless steel tubes are utilized in bathroom hardware for their corrosion resistance, durability, and sleek aesthetics. Their applications in bathroom settings include: Shower Rods: These pipes provide the structural integrity required for shower curtains and are resistant to the moisture present in bathrooms. Grab Bars: Used as safety features in showers and near toilets, these bars must be strong and resistant to corrosion from constant handling and exposure to water. Faucets and Taps: Stainless steel pipes are used in the manufacture of faucets and taps due to their ability to resist corrosion caused by water, as well as for their hygienic properties. Towel Racks: Their ability to withstand humidity and resist corrosion, combined with an attractive finish, makes them suitable for towel racks. Bathroom Accessories: Items like soap holders, shelves, and toilet paper holders can be fashioned from stainless steel pipes for durability and visual appeal. Frame Structures for Shower Screens: The strength and resistance to rust make these pipes an excellent option for the frames of glass shower enclosures. Plumbing Systems: Stainless steel pipes can be used in the plumbing systems that feed sinks, toilets, and bidets due to their resistance to water damage and minimal maintenance requirements. The use of EN 10296-2 stainless steel tubes in bathroom hardware ensures long-lasting performance and maintains the cleanliness and aesthetic quality of bathroom fixtures.
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HANDRAIL & RAILING
HANDRAIL & RAILING
EN 10296-2 stainless steel tubes are extensively used in the construction of handrails and railings due to their mechanical strength, corrosion resistance, and aesthetic appeal. Here are some of the typical applications within this domain: Indoor Handrails: For staircases, balconies, and corridors within residential and commercial buildings, these stainless steel pipes are used for their sleek look and the minimal maintenance they require. Outdoor Railings: Given their excellent resistance to weathering and corrosion, they are ideal for outdoor applications like walkways, bridges, and outdoor staircases, where exposure to the elements is a concern. Balustrades: Stainless steel tubes can be used to create attractive and durable balustrades for decks, patios, and balconies, often combined with glass or other materials. Safety Barriers: In both industrial and public-access areas, these tubes serve as strong and dependable safety barriers that can withstand significant force. Support Structures for Accessibility Ramps: They provide the necessary stability and support for handrails along accessibility ramps, essential for wheelchair access. Swimming Pool Railings: The chlorine-resistant properties make them suitable for use around swimming pools where corrosion resistance is crucial. Architectural Accent Features: Stainless steel handrails and railings are often used for their modern look and feel, serving as design features in architectural projects. The use of EN 10296-2 stainless steel tubes ensures that handrails and railings are not only functional and safe but also have a long lifespan with low maintenance requirements, which is particularly beneficial in high-traffic areas and outdoor environments.
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STAINLESS STEEL FURNITURE
STAINLESS STEEL FURNITURE
EN 10296-2 stainless steel tubes are widely used in stainless steel furniture manufacturing, offering corrosion resistance, durability, and a sleek appearance. Key applications include: Table and Chair Frames: Utilized for their sturdy, rust-resistant properties, ideal for frequent use. Shelving Units: Employed in creating both supports and shelves due to their structural integrity and resistance to warping. Bed Frames: Chosen for robust and moisture-resistant qualities in humid environments. Handles for Cabinets and Drawers: Formed into ergonomic pulls for a modern touch and easy maintenance. Outdoor Furniture: Selected for weather-resistant features, suitable for patio and garden settings. Office Furniture: Applied in sleek, contemporary office designs for desks and workstations. Hospital Furniture: Valued for hygienic properties, used in beds, trolleys, and stands. Retail Displays: Utilized in retail for durable, stylish racks and display units. The adaptability of EN 10296-2 stainless steel tubes allows for a range of applications in furniture, blending aesthetic appeal with functionality.
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