EN 10297-2 Stainless Steel Seamless Round Tubes
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What is EN 10297-2 material?
EN 10297-2 (or BS EN 10297-2) is a European standard specifying technical delivery conditions for seamless circular stainless steel tubes used in mechanical and general engineering applications, excluding pressure purposes. It covers various stainless steel grades (austenitic, ferritic, duplex), outlining requirements for chemical composition, mechanical properties, and manufacturing methods (hot or cold finished).
Key Aspects of EN 10297-2:
Scope: Seamless stainless steel tubes for mechanical/engineering use (e.g., shafts, machine parts).
Synonyms/Related Designations: DIN EN 10297-2, BS EN 10297-2:2005, EN 10297-2 Stainless Steel.
Grades: Includes austenitic, ferritic, martensitic, and duplex stainless steels, plus heat-resisting grades.
Dimensions/Tolerances: Specific tolerances for outside diameter and thickness are provided.
Delivery Conditions: Typically supplied in heat-treated states such as solution annealed (+AT) or quenched & tempered (+QT).
Common Steel Grades (Representative Samples)
The standard covers dozens of grades. Below are the most frequently used grades in engineering:
| Steel Name | Steel Number | Equivalent AISI/ASTM | Structure |
| X5CrNi18-10 | 1.4301 | 304 | Austenitic |
| X2CrNiN18-7 | 1.4318 | 301LN | Austenitic |
| X2CrNiMo17-12-2 | 1.4404 | 316L | Austenitic |
| X6CrNiTi18-10 | 1.4541 | 321 | Austenitic |
| X2CrNiMoN22-5-3 | 1.4462 | 2205 | Duplex |
| X20Cr13 | 1.4021 | 420 | Martensitic |
| X6Cr17 | 1.4016 | 430 | Ferritic |
EN 10297-2 Stainless Steel Round Tubes Chemical Composition (Typical Weight %)
| Steel Number | C (max) | Si (max) | Mn (max) | Cr | Ni | Mo | Others |
| 1.4301 | 0.07 | 1.00 | 2.00 | 17.5 – 19.5 | 8.0 – 10.5 | - | N ≤ 0.11 |
| 1.4404 | 0.03 | 1.00 | 2.00 | 16.5 – 18.5 | 10.0 – 13.0 | 2.0 – 2.5 | N ≤ 0.11 |
| 1.4541 | 0.08 | 1.00 | 2.00 | 17.0 – 19.0 | 9.0 – 12.0 | - | Ti: 5xC to 0.70 |
| 1.4462 | 0.03 | 1.00 | 2.00 | 21.0 – 23.0 | 4.5 – 6.5 | 2.5 – 3.5 | N: 0.10 – 0.22 |
EN 10297-2 Seamless Round Tubes Mechanical Properties (at Room Temperature)
Note: Values apply to the solution annealed (+AT) condition for austenitic and duplex grades.
| Steel Number | Yield Strength
Rp0.2Rp0.2 (MPa) |
Tensile Strength
RmRm (MPa) |
Elongation
AA (%) |
Hardness (HBW) max |
| 1.4301 | ≥ 190 | 500 – 700 | 45 | 215 |
| 1.4404 | ≥ 190 | 500 – 700 | 45 | 215 |
| 1.4541 | ≥ 190 | 500 – 700 | 40 | 215 |
| 1.4462 | ≥ 450 | 650 – 880 | 25 | 270 |
| 1.4021 | ≥ 400 (+QT) | 700 – 850 (+QT) | 13 | 230 (+A) |
EN 10297-2 Stainless Steel Tubes Dimensional Tolerances
EN 10297-2 tubes are subject to specific tolerances on Outside Diameter (OD) and Wall Thickness (WT).
| Parameter | Tolerance Class | Allowed Deviation |
| Outside Diameter (D) | D1 | ± 1.5% or ± 0.75 mm (whichever is greater) |
| D2 | ± 1.0% or ± 0.50 mm (whichever is greater) | |
| D3 | ± 0.75% or ± 0.30 mm (whichever is greater) | |
| Wall Thickness (T) | T1 | ± 15% or ± 0.60 mm (whichever is greater) |
| T2 | ± 12.5% or ± 0.40 mm (whichever is greater) | |
| T3 | ± 10% or ± 0.20 mm (whichever is greater) | |
| Straightness | - | Deviation ≤ 0.0015 of the total length |
EN 10297-2 Stainless Steel Seamless Round Tubes Applications
Mechanical Components: Precision shafts, bushings, and cylinders.
Automotive: Exhaust system components and structural frames.
Construction: Balustrades, structural supports, and architectural fittings.
Aerospace: High-strength mechanical tubing for non-pressure applications.
Testing and Inspection Requirements
To ensure compliance with EN 10297-2, the following tests are performed:
Chemical Analysis: Cast analysis per heat.
Tensile Test: Performed on a sample from one tube per test unit.
Hardness Test: To verify the heat treatment condition.
Dimensional Check: Verification of OD, WT, and Length.
Visual Examination: Inspection of internal and external surface finish (tubes must be free from defects that interfere with their use).
Non-Destructive Testing (NDT): Optional/Mandatory based on specific purchase agreements (e.g., Eddy Current or Ultrasonic testing for longitudinal defects).
If you have project requirements for EN 10297-2 stainless steel tubes, please feel free to place an order. GNEE has a large inventory of popular products for you to choose from. For detailed chemical composition and free samples, please contact our factory immediately. We offer competitive prices and excellent service.
Packaging is done with waterproof paper and steel straps, meeting standard export sea freight packaging requirements, suitable for various modes of transport, or customized according to customer requirements.
Packaging Standard Export Packaging for Stainless Steel Sheets
1. Surface polishing; 2. Strapping packaging;
3. Wooden crate packaging; wooden pallet packaging
4. Container or bulk; 5. Customized according to customer requirements
