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Utilizing 26 high-precision cold rolling mills and 6 cold drawing machines, we ensure dimensional accuracy and superior mechanical properties.
DIN 17456 Stainless Steel Tubing
DIN 17456 | WNr 1.4301 / 1.4404 / 1.4541 / 1.4571 | German Industrial Maintenance Standard
ISO 9001 | DIN / EN Dual Cert | EN 10204 3.1Related Products
Introduction
For engineers, procurement professionals, and plant maintenance teams working with industrial equipment designed and constructed during the decades when German industrial standards set the global benchmark for engineering precision and material specification rigor, DIN 17456 Stainless Steel Tubing represents the foundational material standard whose provisions continue to govern the specification, procurement, and quality acceptance of replacement and maintenance tubing for a vast installed base of German-engineered industrial equipment operating across the global chemical, petrochemical, food processing, pharmaceutical, and general manufacturing industries. Formally titled "Seamless Circular Tubes of Corrosion Resisting Steel — Technical Delivery Conditions," DIN 17456 was the primary German standard governing seamless austenitic and ferritic stainless steel tube production for general corrosion-resisting service applications for several decades preceding the progressive harmonization of German national standards with European EN standards, and it remains a valid and widely referenced specification framework for maintenance procurement, equipment re-specification, and international projects where the original equipment design documentation references DIN material designations rather than their EN or ASTM equivalents. The standard's familiar material designation system — using the DIN Werkstoffnummer (material number) format such as 1.4301, 1.4571, 1.4401, and 1.4306 — provides direct cross-referencing to both the EN 10088 stainless steel designation system and the ASTM UNS system, making DIN 17456 tubing procurement straightforward for engineering teams fluent in any of the three major international stainless steel designation frameworks.
The technical content of DIN 17456 reflects the characteristic German engineering philosophy of comprehensive specification that eliminates ambiguity from every aspect of material supply: chemical composition limits are specified with both minimum and maximum values for all significant alloying elements; mechanical property requirements are tabulated for both the annealed condition and the cold-worked condition where applicable; dimensional tolerances are specified in a hierarchical system with standard and precision tolerance classes; and the testing requirements — covering chemical analysis, tensile testing, hardness testing, and hydraulic pressure testing — are defined with unambiguous frequency, sampling, and acceptance criteria that prevent the interpretive disputes between supplier and purchaser that arise from less rigorously written standards. This comprehensiveness makes DIN 17456 particularly valued in industrial maintenance procurement environments where the risk of receiving non-conforming material is high due to the diversity of global supply sources and the difficulty of conducting full independent verification testing at point of receipt. The DIN standard's detailed acceptance criteria provide a contractual basis for material rejection that is clear, internationally recognized, and legally defensible — qualities that procurement engineers managing large industrial plant maintenance programs value highly when specifying material from global sources for critical process equipment replacement applications.
The grade coverage of DIN 17456 encompasses the core stainless steel grades most commonly encountered in German-engineered industrial equipment — including the workhorse 1.4301 and 1.4306 austenitic grades equivalent to ASTM TP304 and TP304L, the molybdenum-bearing 1.4401 and 1.4404 grades equivalent to TP316 and TP316L, the titanium-stabilized 1.4541 grade equivalent to TP321, and the molybdenum-plus-titanium stabilized 1.4571 grade (equivalent to TP316Ti) that is particularly prevalent in German chemical plant and pharmaceutical equipment where the combined benefits of molybdenum's corrosion resistance and titanium's sensitization protection were historically preferred over the separately optimized 316L low-carbon approach used predominantly in Anglo-American engineering practice. The 1.4571 grade — Werkstoffnummer 1.4571 — deserves particular note as a grade with minimal ASTM equivalent that is found almost exclusively in German and German-influenced equipment, and for which DIN 17456 and its EN successor EN 10216-5 are the primary governing standards. Understanding and correctly specifying 1.4571 — with its combined Mo and Ti requirements — is a critical competency for maintenance engineers managing German-origin chemical plant and pharmaceutical equipment, and our technical team provides the DIN-to-EN-to-ASTM cross-reference expertise required to ensure correct grade identification and sourcing for these maintenance applications.
Our DIN 17456 stainless steel tubing supply program covers all standard DIN Werkstoffnummer grades across the dimensional range of the standard, from 6mm OD minimum to 219mm OD maximum with wall thicknesses from 1.0mm to 20mm, in both the standard tolerance and precision tolerance versions of the standard. For grades where DIN 17456 has been superseded by EN 10216-5 in current production (as is the case for most standard grades), we supply material simultaneously certified to both DIN 17456 and EN 10216-5 requirements, providing the dual-standard documentation required when maintenance procurement must match DIN-designated original equipment but the material is sourced from EN-standard production. Our material database maintains the DIN-to-EN cross-reference for all grades encountered in German industrial equipment, and our technical team provides consultation on grade equivalence, dimensional tolerance conversion between DIN and EN systems, and documentation requirements for maintenance procurement in regulated industries including pharmaceutical GMP and food contact applications governed by German and European regulatory frameworks.
Specifications
| Available Grades | 1.4301, 1.4306, 1.4401, 1.4404, 1.4541, 1.4571 |
| Standard | DIN 17456 (+ Dual EN 10216-5 Available) |
| Outer Diameter | 6mm - 219mm |
| Wall Thickness | 1.0mm - 20mm |
| Length | Up to 12000mm (Fixed or Random) |
| Finish | Bright Annealed or Pickled & Passivated |
Chemical Composition (1.4571 / 316Ti)
| Element | C | Cr | Ni | Mo | Ti | Mn | Si |
| Value (%) | ≤0.08 | 16.5-18.5 | 10.5-13.5 | 2.0-2.5 | 5×C min | ≤2.00 | ≤1.00 |
DIN / EN Dual Cert1.4571 SpecialistGerman Plant MRO
Mechanical Strength (1.4571)
Comprehensive Info
| MOQ | 100kg (Negotiable for stock) |
| Lead Time | 15 - 30 Days |
| Packaging | Plywood Crates with DIN Grade Tags |
| Certifications | ISO 9001, DIN, EN 10204 3.1 |
| Raw Materials | EU-Origin Certified Austenitic Melt |
| Customization | Werkstoffnummer, OD/WT, Dual DIN/EN Cert |
Applications
German Chemical Plant MROMaintenance replacement tubing for German-engineered chemical plant equipment originally specified to DIN Werkstoffnummer grades
Pharmaceutical Process Equipment1.4404 and 1.4571 tubing for GMP-compliant pharmaceutical manufacturing equipment in German and European pharma facilities
Chemical Process Heat ExchangersHeat exchanger tube replacement for 1.4571 and 1.4541 tube bundles in German-origin chemical reactors and process coolers
Food & Beverage EquipmentDIN-specified 1.4301 and 1.4404 tubing for German and European food processing machinery and dairy equipment fabrication
General Industrial MachineryHydraulic and pneumatic circuit tubing in German-engineered industrial machinery and automation systems
Energy & Utilities InfrastructureInstrumentation and small-bore process tubing in German power station and district heating infrastructure maintenance
Advantages
German MRO Expertise
Specialist knowledge of DIN Werkstoffnummer grade system and DIN-to-EN-to-ASTM cross-reference enables correct grade identification for maintenance procurement of German-origin equipment without OEM involvement.
Dual DIN / EN Certification
Simultaneous DIN 17456 and EN 10216-5 certification on a single Mill Test Report — satisfying both the original DIN equipment specification and current European pressure equipment regulatory requirements in one document.
1.4571 Grade Availability
Specialist stock of 1.4571 (316Ti) — the Mo+Ti stabilized grade prevalent in German chemical and pharma equipment that is difficult to source from non-specialist suppliers unfamiliar with this uniquely German-preferred specification.
Tolerance Equivalence Consultation
Technical guidance on converting DIN dimensional tolerance designations to EN tolerance equivalents, ensuring dimensional interchangeability when maintenance replacement material is sourced from EN-standard production to fill DIN-specified requirements.
About Jiangsu Jend Tube Co.,Ltd.
As China DIN 17456 Stainless Steel Tubing Manufacturers and Wholesale DIN 17456 Stainless Steel Tubing Factory, Established in 2011 and is a manufacturing enterprise with a complete manufacturing cycle from raw material selection to finished product delivery. The company currently has more than 100 employees, covers an area of 30015 square meters, and has a registered capital of 48 million yuan, annual production capacity of 3800 tons.
The company has passed ISO9001:2015 quality certification, domestic pressure vessel TS certification, and foreign pressure vessel PED certification. With rich experience and mature technology, we have been expanding our market internationally. At present, our products are exported to more than 50 countries and regions including Europe, America, Southeast Asia, and the Middle East.
The company adheres to different production norms and standards such as the American standard (ASTM), the European standard (EN), the German standard (DIN), the Japanese standard (JIS), the Russian standard (GOST), and the Chinese standard (GB).
Our company specializes in and customizes various specifications of Martensite TP410 (0Cr13, 1Cr13), Ferrite TP405 (1Cr13Al), TP430 (1Cr17), TP444 (0Cr18Mo2), TP439, TP409 (0Cr11Ti), It is also proficient in manufacturing Austenitic seamless stainless steel pipes of series such as TP304(L/H), TP316(L/H/Ti), TP310S, TP317, TP321(H) and TP347(H). Duplex such as S31803, S2205, S32750, S32304, and Nickel-based alloys Monel400, Monel600, Monel800, GH3030, 904L, Inconel 625, etc.
The company mainly produces seamless steel pipes with the following specifications: outer diameter: 3.18mm to 406.4mm, wall thickness: 0.3mm to 20mm, and the longest length is 25000mm. Additionally, it can customize seamless steel pipes with special materials and specifications according to customer requirements. The company attaches great importance to scientific innovation. The staff of the company vigorously develop technological research and development.
Jiangsu Jend Tube Co.,Ltd. will continuously accumulate professional knowledge and capabilities, striving to become a leader in the domestic market and even the world market. Strive to be the most reassuring pipe manufacturing enterprise for customers.
Precision Manufacturing and Process Optimization
We rely on precision equipment and optimized production technologies to achieve outstanding mechanical performance and consistent product quality.
Cold Rolling and Cold Drawing
Solution Heat Treatment
Natural gas solution treatment furnaces and BA solution treatment furnaces optimize the material's grain structure, enhancing corrosion resistance.
Precision Straightening and Polishing
10 straightening machines and 8 finishing polishing machines guarantee product surface smoothness and dimensional accuracy.
Automated Inspection and Quality Assurance
Real-time monitoring systems ensure the stable quality of every batch of products.
Product Usage Tips
DIN to EN Grade Cross-Reference
DIN Werkstoffnummer grades are directly cross-referenced in EN 10088: 1.4301 = EN X5CrNi18-10, 1.4404 = EN X2CrNiMo17-12-2, 1.4541 = EN X6CrNiTi18-10, 1.4571 = EN X6CrNiMoTi17-12-2. When ordering replacement material to EN 10216-5 for DIN-specified equipment, specify the EN grade number and request dual DIN/EN certification to ensure formal documentation compliance with the original equipment specification.
1.4571 vs 1.4404 Selection
1.4571 (316Ti) combines molybdenum corrosion resistance with titanium stabilization against sensitization — historically preferred in German practice for weld-intensive heavy chemical plant fabrication. For new equipment design, 1.4404 (316L) achieves equivalent sensitization protection through low carbon without titanium stabilization, and is generally easier to source globally. For existing 1.4571-specified equipment maintenance, replace with 1.4571 to maintain original specification compliance.
DIN Tolerance System
DIN 17456 specifies dimensional tolerances in a lettered system (tolerance classes A, B, C for OD; S, T for wall thickness) that differs from EN tolerance designations. When substituting EN-standard replacement material, request the EN tolerance class that corresponds to the DIN tolerance class originally specified — our technical team provides the conversion table to ensure dimensional interchangeability is maintained.
Maintenance Documentation Requirements
For regulated industries (pharmaceutical GMP, food contact, pressure equipment), retain both the original DIN 17456 equipment specification and the replacement material EN 10204 3.1 certificate in the equipment maintenance record. Regulators may request evidence that the replacement material grade is equivalent to the original DIN specification — the dual DIN/EN certificate we provide directly satisfies this documentation requirement.
Value-Added Processing Services
We provide DIN-specification-compliant processing services for German industrial plant maintenance and new equipment fabrication:
DIN Tolerance Cutting
Precision cutting to DIN 17456 tolerance class specifications with dimensional verification report.
Dual DIN/EN MTR
Mill Test Reports with simultaneous DIN 17456 and EN 10216-5 compliance statements and full Werkstoffnummer identification.
Hydraulic Testing
Hydraulic pressure testing per DIN 17456 test pressure formula with test record documentation.
Grade Equivalence Reports
Technical equivalence report for DIN-to-EN grade substitution documentation in regulated GMP and pressure vessel maintenance programs.
Payment & Shipping
Payment Terms
- T/T (Telegraphic Transfer)
- L/C at Sight (Letter of Credit)
- Western Union
- Flexible terms for long-term partners
Shipping Options
- Sea Freight (FCL/LCL)
- Air Freight for urgent MRO orders
- Express for small samples
- Seaworthy wooden crates with Werkstoffnummer grade tags
Certifications & Standards
Our DIN 17456 stainless steel tubing is certified to German national and European harmonized standard requirements:
ISO 9001:2015
DIN 17456
EN 10216-5 (Dual)
EN 10204 3.1 MTR
PED Compatible
TÜV Accepted
Frequently Asked Questions
Is DIN 17456 still a valid standard for stainless tubing procurement?
DIN 17456 remains a valid technical reference for maintenance procurement of German-origin equipment and for projects where original design specifications reference DIN Werkstoffnummer grades. For new equipment designed after European harmonization, EN 10216-5 is the current standard; however, dual DIN/EN certification on the same material satisfies both the historical DIN specification and current European requirements simultaneously.
What is the ASTM equivalent of Werkstoffnummer 1.4571?
1.4571 (X6CrNiMoTi17-12-2) is most closely equivalent to ASTM TP316Ti, but this grade is not widely specified in the ASTM system. The closest available ASTM alternatives are TP316L (sacrificing titanium stabilization, retaining low carbon for sensitization protection) or TP316 + mandatory post-weld annealing. For maintenance of 1.4571-specified equipment, we recommend sourcing 1.4571 directly rather than substituting an ASTM grade.
Why is 1.4571 preferred in German chemical plants over 316L?
Historically, German chemical plant engineering practice preferred titanium stabilization (1.4571) over the low-carbon approach (1.4404/316L) for sensitization protection in weld-intensive heavy construction, reflecting design philosophy differences between German and Anglo-American engineering traditions rather than a technical superiority of either approach. Both achieve effective sensitization protection by different metallurgical mechanisms.
Can DIN 17456 material be used in PED pressure equipment?
Material simultaneously certified to DIN 17456 and EN 10216-5 can be used in PED pressure equipment, as the EN 10216-5 certification provides the harmonized standard compliance required for PED presumption of conformity. Pure DIN 17456 material without EN 10216-5 dual certification would require additional qualification documentation under PED Article 14 to demonstrate equivalence to harmonized standard requirements.
How do DIN tolerance classes compare to EN tolerance designations?
DIN 17456 OD tolerance classes A (tightest), B (intermediate), and C (standard) correspond approximately to EN tolerance classes D4, D5, and D6 respectively. Wall thickness tolerance classes S (tight) and T (standard) correspond approximately to EN tolerance classes T3 and T4. Our technical team provides the full conversion table for dimensional interchangeability verification.
Do you stock 1.4571 tubing in common German chemical plant dimensions?
Yes, we maintain stock of 1.4571 tubing in the most commonly encountered German chemical plant heat exchanger and process tubing dimensions. Contact our team with your required OD, wall thickness, and length, and we will confirm stock availability, lead time, and dual DIN/EN certification options for your maintenance procurement requirement.
What documentation is needed to prove DIN-to-EN grade equivalence for GMP maintenance?
For GMP pharmaceutical equipment maintenance, the EN 10204 3.1 Mill Test Report with dual DIN 17456 and EN 10216-5 compliance statements, accompanied by a technical grade equivalence statement cross-referencing the DIN Werkstoffnummer to the EN material number and confirming chemical and mechanical property compliance with both standards, provides the documentation basis for change control justification in GMP regulated maintenance programs.
What is the typical lead time for DIN 17456 stainless tubing?
Common grades (1.4301, 1.4404, 1.4541) in standard dimensions are available from stock within 15–25 days. Specialist grade 1.4571 in common dimensions is available within 20–30 days. Non-standard dimensions or unusual DIN tolerance classes require production lead times of 25–40 days with dual DIN/EN certification.
Ready to Order DIN 17456 Stainless Steel Tubing?
German plant MRO specialists — dual DIN/EN certification, 1.4571 stock, and Werkstoffnummer grade expertise
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