Pressure Tubes
- Carbon & Carbon Alloy Steel
- Stainless Steel
- Copper & Nickel Alloy
- Heat Efficiency Tubes
- Pipe Fittings
- Pipe Flanges
- Gasket, Stud Bolt &Nut
- Industrial Valves
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EN 10216-2:2024 – Seamless Steel Tubes for Pressure Purposes – Technical Delivery Conditions – Part 2: Non-alloy and Alloy Steel Tubes with Specified Elevated Temperature Properties
Ordering Information
Purchasers must specify:
- Quantity (length, number of tubes)
- Material designation (e.g., P235GH, 13CrMo4-5)
- Dimensions (outer diameter, wall thickness, length)
- Delivery condition (e.g., normalized, tempered)
- Testing requirements (e.g., impact testing, NDT)
- Inspection documents (e.g., EN 10204 Type 3.1 or 3.2)
- Special requirements (e.g., hydrogen compatibility, additional tests)
Material Grades & Chemical Composition
Non-Alloy Steels (for Elevated Temp Service)
| Grade | C (max) | Mn | Si | P (max) | S (max) | Other |
| P195GH | 0.13% | 0.40-1.20% | ≤0.40% | 0.025% | 0.015% | - |
| P235GH | 0.16% | 0.60-1.20% | ≤0.35% | 0.025% | 0.015% | - |
| P265GH | 0.20% | 0.80-1.40% | ≤0.40% | 0.025% | 0.015% | - |
Alloy Steels (Cr-Mo & Heat-Resistant Grades)
| Grade | C | Cr | Mo | Other |
| 16Mo3 | 0.12-0.20% | - | 0.25-0.35% | - |
| 13CrMo4-5 | 0.08-0.18% | 0.70-1.15% | 0.40-0.60% | - |
| X10CrMoVNb9-1 (P91) | 0.08-0.12% | 8.0-9.5% | 0.85-1.05% | V, Nb |
Mechanical Properties
Room Temperature Requirements
| Grade | Yield Strength (MPa) | Tensile Strength (MPa) | Elongation (%) |
| P235GH | ≥235 | 360-510 | ≥25 |
| 16Mo3 | ≥270 | 450-600 | ≥22 |
| 13CrMo4-5 | ≥280 | 460-640 | ≥20 |
Elevated Temperature Properties
- Creep resistance data provided for long-term high-temp service.
- Impact testing required for certain grades (e.g., -20°C or -50°C).
Test Requirements
Mandatory Tests
- Tensile test (per EN ISO 6892-1)
- Hydrostatic test (or non-destructive testing (NDT) if agreed)
- Flattening test / Bend test (for certain sizes)
- Impact test (if specified, per EN ISO 148-1)
Optional Tests (if required by purchaser)
- Ultrasonic testing (UT) or eddy current testing (ET)
- Grain size analysis
- High-temperature tensile testing
- Hardness testing
Inspection & Certification
- EN 10204 Type 3.1 (mandatory) – Manufacturer’s self-certification.
- EN 10204 Type 3.2 (if required) – Independent inspection.
- Traceability (heat number, manufacturing process).
Marking & Surface Condition
- Permanent marking: Grade, size, manufacturer, heat number, standard.
- Surface finish: Free from defects affecting performance.
Supplementary Requirements
- S1: Special cleanliness (e.g., for hydrogen service).
- S2: Additional NDT (e.g., full-body ultrasonic testing).
- S3: Specific heat treatment conditions.
Key Applications
- Power plants (boiler tubes, super-heaters)
- Oil & gas (pressure vessels, heat exchangers)
- Chemical industry (high-temp piping)
Major Steel Grades & Category
Non-Alloy Steel Grades (for Elevated Temperature Service)
| Grade | Similar to | Key Characteristics |
| P195GH | – | Low-carbon, general-purpose |
| P235GH | ASTM A106 Gr.B | Standard boiler/pipe steel |
| P265GH | – | Higher strength than P235GH |
Alloy Steel Grades (Cr-Mo & Heat-Resistant Steels)
Molybdenum (Mo) Steels
| Grade | Similar to ASTM | Alloy Composition |
| 16Mo3 | A335 P1 / A209 T1a | 0.3% Mo (low-alloy) |
| 20Mo4 | – | Higher Mo than 16Mo3 |
Chromium-Molybdenum (Cr-Mo) Steels
| Grade | Similar to ASTM | Alloy Composition |
| 13CrMo4-5 | A335 P12 / A213 T12 | 1% Cr-0.5% Mo |
| 10CrMo5-5 | – | 1% Cr-0.5% Mo (variant) |
| 10CrMo9-10 | A335 P22 / A213 T22 | 2.25% Cr-1% Mo |
| X11CrMo5 | – | 5% Cr-0.5% Mo |
| X11CrMo9-1 | A335 P9 / A213 T9 | 9% Cr-1% Mo |
Advanced High-Temperature Steels (Cr-Mo-V-Nb)
| Grade | Similar to ASTM | Alloy Composition |
| X10CrMoVNb9-1 (P91) | A335 P91 / A213 T91 | 9% Cr-1% Mo-V-Nb |
| X11CrMoWVNb9-1-1 | A335 P92 | 9% Cr-2% W-1% Mo-V-Nb |
| X11CrWMoVNb9-2-2 | – | 11% Cr-2% W-Mo-V-Nb |
Stainless/Ferritic-Martensitic Steels
| Grade | Similar to ASTM | Alloy Composition |
| X20Cr13 | – | 13% Cr (martensitic) |
| X6CrNiNb18-10 | A213 TP347H | 18% Cr-10% Ni-Nb (austenitic) |
Key Notes
1. Non-alloy grades (P195GH, P235GH, P265GH) are used for moderate temperatures (up to ~450°C).
2. Cr-Mo grades (13CrMo4-5, 10CrMo9-10, etc.) are for high-temperature creep resistance (e.g., power plants).
3. P91/P92 grades are for ultra-supercritical (USC) boilers (600°C+).
4. Stainless grades (X6CrNiNb18-10) are included for corrosion-resistant high-temp applications.
Comparison with ASTM Standards
- EN 10216-2 X10CrMoVNb9-1 ≈ ASTM A335 P91
- EN 10216-2 13CrMo4-5 ≈ ASTM A335 P12
- EN 10216-2 10CrMo9-10 ≈ ASTM A335 P22
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