P250GH (Material No. 1.0460) is one of the most widely specified carbon steel grades for pressure equipment in Europe. It is extensively used in the manufacturing of EN 1092-1 carbon steel flanges, pressure vessels, valves, fittings, and industrial piping systems operating under moderate pressure and temperature conditions.
As a pressure vessel steel with excellent weldability, reliable mechanical strength, and cost-effective performance, P250GH has become the preferred material for industries such as oil and gas, petrochemical, power generation, water treatment, and process engineering. It is commonly supplied in the normalized condition and fully complies with European pressure equipment requirements, including PED 2014/68/EU et EN 10204 certification.
This guide explains everything you need to know about P250GH flange material, including its chemical composition, mechanical properties, heat treatment, equivalent materials, typical applications, and the key differences between P250GH and ASTM A105. Whether you are selecting materials for a new project or sourcing EN 1092-1 forged carbon steel flanges, this article will help you make an informed engineering decision.
P250GH (1.0460) Chemical Composition
| Élément | Carbone (C) | Silicium (Si) | Manganèse (Mn) | Phosphore (P) | Soufre (S) | Chromium (Cr)* | Nickel (Ni)* | Molybdenum (Mo)* | Copper (Cu)* | Aluminium (Al) |
| Contenu (%) | ≤ 0,20 | ≤ 0,40 | 0.60 – 1.70 | ≤ 0.025 | ≤ 0,015 | ≤ 0,30 | ≤ 0,30 | ≤ 0,08 | ≤ 0,30 | ≥ 0.020 (Killed Steel) |
Note: Chromium (Cr), Nickel (Ni), Molybdenum (Mo), and Copper (Cu) are generally residual elements rather than intentionally added alloying elements. Their maximum limits may vary slightly depending on the applicable product standard, such as forgings, plates, or seamless pipes.
P250GH (1.0460) Mechanical Properties
(Typical values for normalized condition. Actual requirements may vary depending on product form and thickness.)
| Propriété | Valeur |
| Résistance à la traction (Rm) | 410–530 MPa |
| Yield Strength (ReH) | ≥ 250 MPa |
| Elongation (A) | ≥ 22% |
| Impact Test | As specified by the purchase order (typically at ambient or low temperature) |
| Dureté | Typically ≤ 170 HB (not a mandatory standard requirement) |
Propriétés physiques
| Propriété | Valeur |
| Densité | 7,85 g/cm³ |
| Point de fusion | Approximately 1,510°C |
| Thermal Conductivity (20°C) | Approximately 50 W/m·K |
| Module d'élasticité | 210 GPa |
| coefficient de Poisson | 0.3 |
Traitement thermique
P250GH is typically supplied in one of the following conditions:
- Normalized (N)
- Normalized Rolled (NR)
For forged flanges, the most common heat treatment conditions are:
- Normalisé
- Normalized and Tempered (N+T) (when required by project specifications)
Applications typiques
P250GH is widely used in:
- EN 1092-1 Weld Neck Flanges
- EN 1092-1 Blind Flanges
- Récipients sous pression
- Échangeurs de chaleur
- Oil & Gas Pipelines
- Petrochemical Plants
- Water Treatment Facilities
- Steam Piping Systems
Equivalent Materials (Approximate)
| European Standard | ASTM/ASME (Approximate) | German Designation |
| P250GH | ASTM A105 / ASTM A105N | C22.8 (1.0460) |
Important: P250GH and ASTM A105/A105N are widely regarded as approximately equivalent for many industrial applications. However, they are manufactured to different standards and should not be considered directly interchangeable without verifying project specifications, design codes, mechanical property requirements, and certification requirements.
Key Advantages of P250GH
- Excellente soudabilité
- Bonne usinabilité
- Stable mechanical properties after normalizing
- Suitable for pressure equipment in accordance with the Pressure Equipment Directive (PED)
- Cost-effective compared with alloy steels
- Widely accepted and readily available throughout the European market
FAQs About P250GH material
P250GH (Material No. 1.0460) is a European carbon steel grade designed for pressure equipment and piping systems. It is commonly used for EN 1092-1 carbon steel flanges, pressure vessels, valves, and fittings due to its excellent weldability, reliable mechanical properties, and compliance with European pressure equipment standards.
P250GH and ASTM A105 are considered approximately equivalent in many industrial applications because they have similar strength and are both used for pressure piping components. However, they are produced under different standards and should not be regarded as directly interchangeable without verifying the project specifications, design code, and certification requirements.
The European material number for P250GH is 1.0460. It is one of the most widely used carbon steel grades for forged flanges and pressure equipment throughout Europe.
P250GH is widely used in:
- EN 1092-1 weld neck flanges
- Blind flanges
- Pressure vessels
- Heat exchangers
- Steam pipelines
- Oil & gas piping
- Petrochemical plants
- Water treatment systems
P250GH is typically supplied in the normalized (N) ou normalized rolled (NR) condition. Forged flanges are usually normalized, while some projects may require normalized and tempered (N+T) depending on engineering specifications.
Typical mechanical properties include:
- Limite d'élasticité : ≥ 250 MPa
- Tensile Strength: 410–530 MPa
- Allongement : ≥22%
Actual values depend on product form, dimensions, and the applicable EN standard.
Yes. P250GH is suitable for moderate-temperature pressure applications such as steam systems, boilers, and pressure vessels. For higher operating temperatures, alloy steels such as 16Mo3, 13CrMo4-5, ou 10CrMo9-10 peut être plus approprié.
P250GH is intended for general pressure service and is not specifically designed for cryogenic or low-temperature applications. For low-temperature service, European standards typically recommend P355NL1 ou P355NL2.
P250GH flanges can be supplied with:
- EN 10204 Type 3.1
- EN 10204 Type 3.2
- PED 2014/68/EU compliance
- PMI testing
- UT, PT, MT inspection
- Third-party inspection by BV, TÜV, DNV, or SGS upon request
P250GH is available for most EN 1092-1 flange types, including:
- Type 01 Plate Flange
- Type 05 Blind Flange
- Type 11 Weld Neck Flange
- Type 12 Hubbed Slip-On Flange
- Type 13 Threaded Flange
P250GH flanges are commonly manufactured in accordance with EN 1092-1 pressure ratings, including:
- PN6
- PN10
- PN16
- PN25
- PN40
- PN63
- PN100
The allowable working pressure depends on both the material properties and the operating temperature.
P250GH offers an excellent balance of strength, weldability, machinability, and cost. It fully complies with European pressure equipment standards and is readily available across the European market, making it one of the preferred materials for EN 1092-1 carbon steel flanges.
Full-service supplier of EN 1092-1 flanges for all your requirements
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European Standard Carbon Steel Flanges for Industrial Piping Systems
SSMALLOYS manufactures and supplies EN 1092-1 carbon steel flanges for the European, Middle Eastern, and global industrial markets. Our products are available in P250GH, C22.8, P235GH, P355NL1, and other pressure vessel steel grades, meeting the requirements of EN 1092-1, PED 2014/68/EU, et EN 10204 certification.
From standard PN16 flanges to high-pressure PN100 forged flanges, we provide reliable flange solutions for oil & gas, petrochemical, power generation, water treatment, shipbuilding, and industrial piping systems.
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