EN 10216-1 P235TR1 seamless pipes and tubes belong to the non alloy section of steel products that are used for pressure purposes as per EN 10216-1 standards. P235TR1 is identified by steel number 1.0254 and minimum yield strength of 235 MPa and tensile strength of 360 to 500 MPa. The grade is very popular for various pressure applications and is a replacement for earlier DIN 1629 St 37.0 grade, which was used widely. Amardeep Steel has been supplying these EN 10216-1 P235TR1 pipes and tubes along with the EN 10204 3.1 mill test certificates and full heat tracing. For elevated temperature service, see our EN 10216-2 P235GH tubes. For a lower strength grade, compare EN 10216-1 P195TR1 seamless tubes, or browse all carbon steel seamless pipes and tubes.
What Are P235TR1 Seamless Pipes and Tubes?
P235TR1 is a non-alloy steel for seamless pressure tubes with properties specified at room temperature. The higher manganese allowance (1.20% maximum) lifts the yield to 235 MPa while keeping the steel easy to weld and bend. As a TR1 quality, it has no aluminium requirement and no mandatory impact test. If impact values are needed, order P235TR2.
P235TR1 or P235GH?
Both grades have 235 MPa minimum yield, but P235GH is made to EN 10216-2 with yield values specified at elevated temperatures for boilers and pressure vessels. P235TR1 has properties specified at room temperature only. Use P235GH wherever the design temperature is above ambient.
EN 10216-1 P235TR1 Specifications
Parameter | Details |
|---|---|
Standard | EN 10216-1 (seamless non-alloy steel tubes for pressure purposes, room temperature properties) |
Grade | P235TR1 (1.0254) |
Type | Seamless, hot finished or cold finished |
Outside Diameter | About 10 mm to 508 mm OD, to EN 10220 series |
Wall Thickness | About 1.6 mm to 40 mm, depending on OD |
Delivery Condition | Normalised or normalising formed (+N); cold finished tubes are normalised after cold forming |
Length | Random and exact lengths |
Ends | Plain end, bevelled end on request |
Test Certificate | EN 10204 3.1 Inspection Certificate upon custom commercial agreements |
P235TR1 Chemical Composition
Element | Content (%) |
|---|---|
Carbon (C) | 0.16 max |
Silicon (Si) | 0.35 max |
Manganese (Mn) | 1.20 max |
Phosphorus (P) | 0.025 max |
Sulfur (S) | 0.020 max |
Chromium (Cr) | 0.30 max |
Molybdenum (Mo) | 0.08 max |
Nickel (Ni) | 0.30 max |
Copper (Cu) | 0.30 max |
Niobium (Nb) | 0.010 max |
Titanium (Ti) | 0.040 max |
Vanadium (V) | 0.02 max |
Cr + Cu + Mo + Ni | 0.70 max |
P235TR1 Mechanical Properties
Property | Value |
|---|---|
Upper Yield Strength ReH, min (wall up to 16 mm) | 235 MPa |
ReH, min (wall over 16 to 40 mm) | 225 MPa |
ReH, min (wall over 40 to 60 mm) | 215 MPa |
Tensile Strength Rm | 360 to 500 MPa |
Elongation A, min (longitudinal / transverse) | 25% / 23% |
Impact Energy KV, min at 0°C | Not required for TR1 |
P235TR1 Equivalent Grades
Standard | Designation |
|---|---|
EN steel number | 1.0254 |
Former DIN 1629 | St 37.0 |
Closest ASTM | A106 Grade A / A53 Grade A, a close match, not identical |
Welded equivalent | EN 10217-1 P235TR1 |
Equivalent grades are close matches, not direct substitutes. For the precision tube in the same strength class, see EN 10305-1 E235 tubes; for welded tube, see EN 10217-1 welded steel tubes.
P235TR1 vs P195TR1 vs P235GH
Property | P195TR1 | P195TR2 | P235TR1 | P235GH (EN 10216-2) |
|---|---|---|---|---|
Carbon, max | 0.13% | 0.13% | 0.16% | 0.16% |
Manganese, max | 0.70% | 0.70% | 1.20% | 1.20% |
Sulfur, max | 0.020% | 0.015% | 0.020% | 0.010% |
Aluminium | Not specified | 0.020% min | Not specified | 0.020% min |
ReH min (wall up to 16 mm) | 195 MPa | 195 MPa | 235 MPa | 235 MPa |
Rm | 320 to 440 MPa | 320 to 440 MPa | 360 to 500 MPa | 360 to 500 MPa |
Impact test | Not required | 40 J at 0°C (long.) | Not required | Required |
Inspection | Non-specific allowed | Specific | Non-specific allowed | Specific |
Design temperature | Room temperature | Room temperature | Room temperature | Elevated temperature |
Values per EN 10216-1 and EN 10216-2. P235TR1 and P235GH share a yield level but are not interchangeable: P235GH has specified elevated temperature properties. Confirm values against the edition on your order.
For the higher strength ASTM option, see our ASTM A106 Grade B and C pipes. For impact tested P195, see EN 10216-1 P195TR2 seamless tubes.
P235TR1 Size and Weight Chart
OD (mm) | 2.0 mm | 2.6 mm | 3.2 mm | 4.0 mm | 5.0 mm | 6.3 mm |
|---|---|---|---|---|---|---|
21.3 | 0.95 | 1.20 | 1.43 | 1.71 | n/a | n/a |
26.9 | 1.23 | 1.56 | 1.87 | 2.26 | n/a | n/a |
33.7 | 1.56 | 1.99 | 2.41 | 2.93 | 3.54 | 4.26 |
42.4 | 1.99 | 2.55 | 3.09 | 3.79 | 4.61 | 5.61 |
48.3 | 2.28 | 2.93 | 3.56 | 4.37 | 5.34 | 6.53 |
60.3 | n/a | 3.70 | 4.51 | 5.55 | 6.82 | 8.39 |
76.1 | n/a | 4.71 | 5.75 | 7.11 | 8.77 | 10.84 |
88.9 | n/a | 5.53 | 6.76 | 8.38 | 10.35 | 12.83 |
114.3 | n/a | 7.16 | 8.77 | 10.88 | 13.48 | 16.78 |
139.7 | n/a | 8.79 | 10.77 | 13.39 | 16.61 | 20.73 |
168.3 | n/a | 10.62 | 13.03 | 16.21 | 20.14 | 25.17 |
219.1 | n/a | 13.88 | 17.04 | 21.22 | 26.40 | 33.06 |
Weights in kg/m, worked out as (OD minus wall) x wall x 0.02466, for steel at 7.85 g/cm³. Outside diameters follow EN 10220 series 1. Other ODs and walls are made to order.
Applications of P235TR1 Seamless Pipes and Tubes
- Low pressure water, air and gas lines
- Compressed air and pneumatic systems
- General mechanical and structural pressure parts
- Hydraulic and lubrication lines at ambient temperature
- Fire protection and sprinkler systems
- Machine building and replacement of St 37.0 tubes
Testing and Documentation
Every order of P235TR1 seamless tube goes through the checks below at our testing facility or approved third party labs.
- Ladle chemical analysis
- Tensile test
- Flattening or ring expanding test
- Leak tightness test: hydrostatic or electromagnetic
- Visual and dimensional inspection
Mill test certificates are issued to EN 10204 3.1, with 3.2 available on request. You can view our approvals on the certificates page.
Packing and Marking
Each tube is marked with EN 10216-1, P235TR1, size, heat number and manufacturer name. Tubes are varnished or oiled against rust, ends capped on request, and packed in hexagonal bundles with steel strapping. Read more about our packing and despatch process.
Request a Quote for EN 10216-1 P235TR1 Seamless Pipes & Tubes
Send us the OD, wall thickness, quality (TR1 or TR2), length and quantity, and our team will reply with price and delivery. Use the enquiry form or reach us through the contact page.
Frequently Asked Questions
What is P235TR1?
P235TR1 (1.0254) is a non-alloy steel grade in EN 10216-1 for seamless pressure tubes, with 235 MPa minimum yield and 360 to 500 MPa tensile strength at room temperature.
What is the difference between P235TR1 and P235GH?
P235TR1 (EN 10216-1) has properties specified at room temperature. P235GH (EN 10216-2) has yield values specified at elevated temperatures and is used for boilers and pressure vessels.
What is the old DIN equivalent of P235TR1?
P235TR1 replaced St 37.0 from DIN 1629.
Does P235TR1 need an impact test?
No. Impact testing is not required for TR1 quality. Order P235TR2 if impact values are needed.
What is the tensile strength of P235TR1?
EN 10216-1 sets a tensile strength of 360 to 500 MPa for P235TR1.
