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; depends on dimension and heat treatment.
Available forms.
Size range: Bars Ø 8–250 mm · profiles per section
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 is the European (EN) designation, while St44-2, A572 Gr.42 are the matching names used in other countries and standards (for example AISI/SAE in the USA, JIS in Japan, GB in China, former DIN in Germany). They are near equivalents and may differ slightly in chemistry; 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.
What is S275JR used for?
Typical applications include Steel structures & frames, Machine bases, General fabrication, Construction.