When to choose S275JR
S275JR gives 17% more yield strength than S235JR for a 1–3% price difference, which is why EU and Gulf structural engineers specify it for secondary beams, bracing, base and end plates, gussets and welded frames when S355 is not needed. In practice: use S235JR for non-structural fabrication and light frames; S275JR when the design uses fy = 275 MPa (many older BS 5950 and Gulf specs still call up Grade 43 / S275); S355J2 for primary members, cranes, high-load connections and cold climates. Carbon equivalent stays below 0.40, so welding follows the same procedures as S235.
Mechanical properties by thickness
| Thickness | Yield min (MPa) | Tensile (MPa) | Elongation min | Impact |
|---|---|---|---|---|
| ≤ 16 mm | 275 | 410–560 | 23% | 27 J at +20 °C |
| 16 – 40 mm | 265 | 410–560 | 23% | 27 J at +20 °C |
| 40 – 63 mm | 255 | 410–560 | 22% | 27 J at +20 °C |
| 63 – 80 mm | 245 | 410–560 | 22% | 27 J at +20 °C |
S275J0 (0 °C) and S275J2 (−20 °C) on request. Chemistry: C ≤ 0.21, Mn ≤ 1.50, P/S ≤ 0.035, CEV ≤ 0.40.
Equivalents
| Standard | Grade | Yield | Note |
|---|---|---|---|
| DIN 17100 | St44-2 | 275 | Superseded by S275JR |
| BS 4360 | 43A / 43B | 275 | Superseded |
| ISO 630 | Fe 430 B | 275 | — |
| ASTM | A572 Gr. 42 | 290 | Near; slightly higher yield |
| JIS G3101 | SS400 | 245 | Lower yield, often accepted |
| GOST | St4sp | 265 | CIS specs |
Weight chart
| Thickness | kg/m² | 1 500 × 6 000 (kg) | 2 000 × 6 000 (kg) | 2 500 × 12 000 (kg) |
|---|---|---|---|---|
| 6 mm | 47.1 | 424 | 565 | 1 413 |
| 8 mm | 62.8 | 565 | 754 | 1 884 |
| 10 mm | 78.5 | 707 | 942 | 2 355 |
| 12 mm | 94.2 | 848 | 1 130 | 2 826 |
| 15 mm | 118 | 1 060 | 1 413 | 3 533 |
| 20 mm | 157 | 1 413 | 1 884 | 4 710 |
| 25 mm | 196 | 1 766 | 2 355 | 5 888 |
| 30 mm | 236 | 2 120 | 2 826 | 7 065 |
| 40 mm | 314 | 2 826 | 3 768 | 9 420 |
| 50 mm | 393 | 3 533 | 4 710 | 11 775 |
Processing
Laser (to 25 mm), plasma (to 80 mm) and flame cutting to DXF; bevelling, drilling, shot-blast Sa 2½ and shop primer; plate rolling into shells. Base-plate and gusset kits for steel buildings are nested, cut, drilled and labelled per drawing.
S275JR price per ton
S275JR is quoted per mill lot at a small premium (1–3%) over the S235JR band shown on the S235JR plate page; ask for the current figure for your thickness mix. Cutting and priming are priced per piece.
Bands from our weekly export list (September 2026), FOB Istanbul, full-container quantities, excluding freight and certificates. Firm price per project on RFQ within one working day.
Export and packing
Packs to 5 t on skids; 6 m plate in 40' HC, 12 m by flat-rack or breakbulk. HS code 7208.51/.52.
| Term | Detail |
|---|---|
| MOQ | 1 × 20' (≈20 t) or 1 truck; breakbulk from 100 t |
| Incoterms | FOB Istanbul · CIF / CFR Gulf, Africa · DAP EU, Balkans, Iraq, Caucasus |
| Lead time | Common sizes 5–10 working days; mill 3–5 weeks |
| Packing | Packs to 5 t on skids, strapped |
| Container / truck | 40' HC ≈ 24–25 t · flat-rack / breakbulk for 12 m · truck 24 t |
| Documents | Invoice, packing list, EN 10204 3.1, CE, certificate of origin; 3.2 / UT / SASO / SONCAP on request |
| Payment | 30% advance, balance against B/L copy; L/C at sight via London office |
Certificates
EN 10204 3.1 per plate, CE per EN 10025, certificate of origin; 3.2, UT (EN 10160), SASO / SONCAP / COC / EAC on request.
How to order
Send thickness × width × length or the cutting list, quantity, surface and port; we reply within one working day with price, plate list and lead time.
Standards
- EN 10025-2 (S275JR / J0 / J2)
- EN 10029 (tolerances)
- ASTM A572 Gr. 42 (near)
- DIN 17100 St44-2 (superseded)
- BS 4360 Gr. 43A (superseded)
Grades
Grade data sheets (chemistry, mechanicals, equivalents) are on our reference site: S275JR · S235JR · S355JR
Frequently asked questions
What is the difference between S235JR and S275JR?
Yield strength: 235 vs 275 MPa (tensile 360–510 vs 410–560). Same weldability and price within 1–3%. S275 is chosen when the design uses fy = 275 or the spec calls for Grade 43 / ST44.
Is S275JR the same as ST44?
Yes — S275JR replaced DIN 17100 St44-2 (and BS 4360 43A) with the same 275 MPa yield; the EN grade adds the +20 °C impact requirement.
What is the ASTM equivalent of S275JR?
Closest is A572 Grade 42 (290 MPa); A36 (250 MPa) is below it. For Gulf projects specifying SS400, S275JR normally exceeds the requirement.
Can S275JR be welded without preheat?
Yes up to about 50 mm with CEV ≤ 0.40; standard SMAW / GMAW / SAW procedures for S235 apply. Preheat is only considered for very thick, highly restrained joints.
Do you stock S275JR?
Yes in the common thicknesses 6–25 mm; 30–50 mm and J0/J2 impact grades are ordered from the mill in 3–5 weeks.
Is S275JR more expensive than S235JR?
By 1–3% per ton on the same mill lot; it is often the better value where it removes a thickness step.