Structural Steel
S275JR · 1.0044
Also known as St44-2 / A572 Gr.42
Mid-strength structural steel between S235 and S355.
S275JR (material 1.0044, formerly St44-2) is a low-carbon structural steel with a minimum yield of 275 MPa, sitting between S235 and S355. It offers a good balance of strength and weldability for structural frames, bars, cold-drawn bar and profiles.
International equivalents.
The same steel by country and standard — near matches; mill certificate governs.
Chemical composition.
Indicative, % by weight per EN 10025-2. Mill certificate governs.
| Element | % |
|---|---|
| C | ≤ 0.21 |
| Mn | ≤ 1.50 |
| P | ≤ 0.035 |
| S | ≤ 0.035 |
| N | ≤ 0.012 |
Mechanical properties.
Indicative values for a reference section and heat-treatment condition. Actual properties vary with dimension and treatment, and are confirmed on the mill certificate.
Available forms.
Size: Bars Ø 8–250 mm · profiles per section · flats, plates & sheet to specification
Typical applications.
- Steel structures & frames
- Machine bases
- General fabrication
- Construction
FAQ.
What is S275JR?
S275JR (material 1.0044, formerly St44-2) is a low-carbon structural steel with a minimum yield of 275 MPa, sitting between S235 and S355. It offers a good balance of strength and weldability for structural frames, bars, cold-drawn bar and profiles.
Is S275JR the same as St44-2?
Yes — S275JR and St44-2, A572 Gr.42 are matching designations for the same steel across different standards (EN, AISI/SAE, JIS, GB, former DIN). They are near equivalents and may differ slightly in chemistry, so the mill certificate governs the exact specification.
What are the international equivalents of S275JR?
S275JR corresponds to S275JR (1.0044) (EN), St44-2 (former DIN), A572 Gr.42 (near) (ASTM), Q275 (GB). Equivalents are nearest matches by country/standard; the mill certificate governs the exact specification.
In which forms is S275JR available?
S275JR is supplied as Round bar, Flat bar, Square bar, Equal angle, Bright / cold-drawn bar, Profile, Plate / sheet, in Bars Ø 8–250 mm · profiles per section (bar diameter; flats, plates and sheet are quoted to specification).
What is S275JR used for?
Typical applications include Steel structures & frames, Machine bases, General fabrication, Construction.