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Introduction
DIN
17457 covers welded circular austenitic stainless steel tubes subject to
special requirements, intended for applications where excellent corrosion
resistance, mechanical strength, weld quality, dimensional accuracy, and
reliable service performance are essential. These stainless steel tubes are
suitable for demanding industrial applications involving corrosive media,
elevated temperatures, pressure, and specialized engineering requirements.
DIN
17457 welded circular austenitic stainless steel tubes are widely used in
chemical processing, petrochemical plants, power generation, heat exchangers,
condensers, pharmaceutical equipment, food processing, mechanical engineering,
and process industries. Their excellent corrosion resistance, weldability,
formability, and durability make them suitable for critical applications
requiring enhanced quality requirements.
Ladhani
Metal Corporation is a manufacturer, supplier, and exporter of DIN 17457 Welded
Circular Austenitic Stainless Steel Tubes, supplying high-quality stainless
steel tubes in various grades, sizes, wall thicknesses, surface finishes, and
customized dimensions worldwide.
Applicable Standard
Standard
Specification: DIN 17457
Organization:
Deutsches Institut für Normung (DIN)
Title:
Welded Circular Austenitic Stainless Steel Tubes Subject to Special
Requirements
This
specification covers welded circular austenitic stainless steel tubes
manufactured for applications requiring special quality, dimensional,
mechanical, and corrosion-resistance requirements.
Forms of Supply
DIN
17457 stainless steel tubes are supplied in the following forms:
•
Welded Circular Stainless Steel Tubes
• Austenitic Stainless Steel Tubes
• Precision Tubes
• Heat Exchanger Tubes
• Condenser Tubes
• Process Tubes
• Instrumentation Tubes
• Straight Length Tubes
• Custom Cut Tubes
• Fabrication-Ready Tubes
Grades Covered Under DIN 17457
Austenitic
stainless steel grades as specified under DIN 17457.
Supply Condition
•
Welded Condition
• Annealed Condition
• Solution Annealed Condition
• Cold Finished Condition
• Bright Annealed Condition
• Pickled and Passivated Condition
• Fabrication-Ready Condition
Surface Finish
•
Mill Finish
• Bright Finish
• Pickled Finish
• Passivated Finish
• Polished Finish
• Satin Finish
• Smooth Finish
Standard Sizes
Stainless Steel Tubes
Outside
Diameter: 6 mm to 610 mm
Wall
Thickness: 0.5 mm to 25 mm
Length:
Up to 12 meters
Custom
outside diameters, wall thicknesses, lengths, and surface finishes are
available according to customer requirements.
Chemical Composition of DIN 17457
|
Steel Grade |
C, max. |
Cr, % by mass |
Mo, % by mass |
Ni, % by mass |
Others |
|
X5CrNi18
10 |
0.07 |
17.0–19.0 |
– |
8.5–10.5 |
– |
|
X2CrNi19
11 |
0.030 |
18.0–20.0 |
– |
10.0–12.5 |
– |
|
X2CrNiN18
10 |
0.030 |
17.0–19.0 |
– |
8.5–11.5 |
N:
0.12–0.22 |
|
X6CrNiTi18
10 |
0.08 |
17.0–19.0 |
– |
9.0–12.0 |
Ti: 5 × C,
up to 0.80 |
|
X6CrNiNb18
10 |
0.08 |
17.0–19.0 |
– |
9.0–12.0 |
Nb: 10 ×
C, up to 1.00 |
|
X5CrNiMo17
12 2 |
0.07 |
16.5–18.5 |
2.0–2.5 |
10.5–13.5 |
– |
|
X2CrNiMo17
13 2 |
0.030 |
16.5–18.5 |
2.0–2.5 |
11.0–14.0 |
– |
|
X6CrNiMoTi17
12 2 |
0.08 |
16.5–18.5 |
2.0–2.5 |
10.5–13.5 |
Ti: 5 × C,
up to 0.80 |
|
X2CrNiMoN17
13 3 |
0.030 |
16.5–18.5 |
2.5–3.0 |
11.5–14.5 |
N:
0.14–0.22; S ≤ 0.025 |
|
X2CrNiMo18
14 3 |
0.030 |
17.0–18.5 |
2.5–3.0 |
12.5–15.0 |
S ≤ 0.025 |
|
X5CrNiMo17
13 3 |
0.07 |
16.5–18.5 |
2.5–3.0 |
11.0–14.0 |
S ≤ 0.025 |
|
X2CrNiMo17
13 5 |
0.030 |
16.5–18.5 |
4.0–5.0 |
12.5–14.5 |
N:
0.12–0.22; S ≤ 0.025 |
Notes:
- Elements not specified for
individual steel grades shall not be deliberately added without the
purchaser's consent, except for finishing the melt.
- The symbols given in the
December 1972 edition of DIN 17440 may continue to be used during the
validity period of the standard.
- Unless otherwise specified: P ≤
0.045%, S ≤ 0.030%, Si ≤ 1.0%, Mn ≤ 2.0%.
- Tantalum is determined together
with niobium and expressed in terms of niobium content.
Key Features of DIN 17457 Stainless Steel
Tubes
•
Excellent corrosion resistance
• Superior resistance to oxidation
• High mechanical strength
• Excellent weld quality
• Good formability
• High dimensional accuracy
• Excellent surface quality
• Good toughness
• Long service life
• Suitable for demanding industrial applications
Applications of DIN 17457 Stainless Steel
Tubes
Chemical & Petrochemical Industry
•
Process Piping
• Chemical Processing Equipment
• Heat Exchangers
• Condensers
• Process Systems
Power Generation Industry
•
Heat Exchanger Systems
• Condenser Tubes
• Cooling Systems
• Process Piping
• Power Plant Equipment
Food & Pharmaceutical Industry
•
Process Equipment
• Hygienic Piping
• Food Processing Systems
• Pharmaceutical Equipment
• Sanitary Applications
Mechanical Engineering
•
Precision Equipment
• Machine Components
• Industrial Machinery
• Fabrication Components
General Industrial Applications
•
Fluid Transportation
• Process Tubing
• Industrial Equipment
• Engineering Assemblies
• Fabricated Components
Fabrication and Welding
DIN
17457 welded austenitic stainless steel tubes provide excellent fabrication and
welding characteristics.
•
Suitable for conventional welding processes
• Excellent bending properties
• Good forming characteristics
• Suitable for precision fabrication
• Reliable welded joint performance
• Excellent dimensional stability
• Suitable for custom fabrication
Proper
welding procedures should be followed to maintain corrosion resistance and
mechanical properties.
Heat Treatment
DIN
17457 stainless steel tubes may be supplied in suitable annealed or solution
annealed conditions depending on the grade and application.
•
Solution annealing improves corrosion resistance
• Annealing enhances ductility and formability
• Controlled heat treatment ensures uniform mechanical properties
• Stress relieving minimizes fabrication stresses where applicable
• Proper heat treatment improves long-term service performance
Advantages of DIN 17457 Stainless Steel Tubes
•
Excellent corrosion resistance
• High mechanical strength
• Superior weldability
• Excellent formability
• High dimensional accuracy
• Reliable weld quality
• Long operational life
• Low maintenance requirements
• Excellent surface finish
• Suitable for special engineering requirements
Conclusion
DIN
17457 Welded Circular Austenitic Stainless Steel Tubes Subject to Special
Requirements are designed for demanding applications requiring excellent
corrosion resistance, reliable weld quality, mechanical strength, dimensional
accuracy, and long-term performance. These tubes are widely used in chemical,
petrochemical, power generation, food processing, pharmaceutical, mechanical
engineering, and industrial process applications.
Ladhani Metal Corporation supplies DIN
17457 Welded Circular Austenitic Stainless Steel Tubes in various grades,
sizes, wall thicknesses, surface finishes, and customized dimensions, providing
reliable stainless steel tubing solutions for specialized industrial and
engineering projects worldwide.
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