What are the properties of P235GH?
P235GH is a non-alloy structural steel seamless pipe material in the European standard system designed for high-temperature and pressure-bearing environments. In its naming convention, "P" represents pressure vessel steel, "235" indicates a minimum yield strength of 235 MPa at room temperature, and "GH" indicates that the material is suitable for hot working conditions. Through precise composition control and heat treatment processes (usually delivered in the normalized state), this material possesses excellent plasticity, toughness, cold bending properties, and weldability, making it particularly suitable for long-term stable operation under high temperature and high pressure environments.
p235gh mechanical properties
| Thickness | Tensile Test | Impact Test | ||||
| yield strength (Mpa) (Min) | tensile strength (Mpa) (Min) | elongation (%) | -20℃ | 0℃ | +20℃ | |
| ≤16 | 235 | 360-480 | 24 | 27 | 27 | 27 |
| 16<t≤40 | 225 | |||||
| 40<t≤60 | 215 | |||||
| 60<t≤100 | 200 | |||||
| 100<t≤150 | 185 | 350-480 | ||||
| 150<t≤250 | 170 | 340-480 | ||||
Chemical composition of P235GH (%)
| C | Si | Mn | P | S | Cr | Cu | Mo | Nb | Ni | Ti | V | N | Alt |
| ≤0.16 | ≤0.35 | ≤0.60-1.20 | ≤0.025 | ≤0.010 | ≤0.30 | ≤0.30 | ≤0.08 | ≤0.020 | ≤0.30 | ≤0.03 | ≤0.02 | ≤0.012 | ≤0.020 |
P235GH material specification
| EFW Pipes sizes | 5.0 – 1219.2 milimeter |
|---|---|
| Standards | EN, DIN, AISI, JIS, ASME GB, IS, ASTM Pipes |
| Seamless Pipes Sizes | 4 to 219 milimeterW. T.: 0.5 to 20 milimeter |
| Welded Pipes Sizes | 5.0 – 1219.2 milimeter |
| Schedules | SCH20, SCH10, SCH160, SCH120, SCH30, SCH40, SCH80, SCH5, STD, SCH10S, SCH140, SCH40S, XXS XS, SCH80, SCH60, |
| Seamless Tube Sizes | 3.35 OD To 101.6 milimeter OD |
| End | Plain End, Beveled End, Treaded Pipes & Tube |
| Welded Tube Sizes | 6.35 milimeter OD To 152 milimeter OD |
| wall thickness | 0.020 –0.220 inch |
| Types | Seamless, Welded, ERW, Fabricated , EFW Pipes, Hydraulic, 'U' bent or Hollow, LSAW, Straight Tube, Boiler, Tube Coil, Rectangular, Round, Square Tube etc |
| Bwg & Swg | 12 Swg., 10 Swg., 14 Swg., 18 Swg., 16 Swg., 20 Swg. |
| Length | Double , Single ,Standard & Cut length Pipes & Tube |
| Finish | MF Polished, AP, BA |
P235GH vs. P235TR1
| Feature | P235GH | P235TR1 | Key Differences |
|---|---|---|---|
| Standard | EN 10028-2 (Pressure equipment steel) | EN 10216-1 (Seamless steel tubes for pressure purposes) | P235GH is typically used for flat products (plates, sheets), while P235TR1 is specified for seamless tubes. |
| Heat Treatment | Normalized or normalized rolled (N/N Normalization) | Typically supplied in +N (Normalized) or +AR (As-rolled, but less common) | Both may undergo normalization, but P235TR1 is often supplied specifically in the normalized condition for tubes. |
| Chemical Composition | Similar base composition (C, Mn, P, S limits), but P235GH may have slightly stricter controls on certain elements for flat products. | Similar, but optimized for tube production; may have slightly different limits for trace elements to ensure weldability and toughness in tubular form. | P235GH and P235TR1 have very similar chemical compositions, but the allowable ranges for certain elements might differ slightly due to the product form (flat vs. tubular). |
| Mechanical Properties | Yield Strength: ≥235 MPa Tensile Strength: 360-480 MPa Elongation: ≥22% (for plates/sheets) |
Yield Strength: ≥235 MPa Tensile Strength: 360-480 MPa Elongation: ≥20% (for tubes, depending on diameter and thickness) |
The mechanical property requirements are similar, but the minimum elongation values may differ slightly due to the different product forms and testing methods. |
| Applications | Boilers, pressure vessels, heat exchangers, and other pressure equipment where flat products are suitable. | Seamless tubes for pressure purposes, such as in boilers, heat exchangers, and other systems where tubular components are required. | The primary difference lies in the product form and the specific applications they are designed for. P235GH is for flat products, while P235TR1 is for seamless tubes. |
| Toughness Requirements | Good toughness at room temperature and elevated temperatures, with impact testing often required. | Also requires good toughness, especially at low temperatures for some applications; impact testing may be specified depending on the standard and customer requirements. | Both steels require good toughness, but the specific impact testing requirements may vary based on the product standard and the intended application. |
| Weldability | Good weldability with appropriate procedures. | Excellent weldability, which is critical for tubular components that will be welded together. | Both steels are weldable, but P235TR1's weldability is particularly important due to its common use in welded tube assemblies. |
P235GH seamless tube factory
