40x12mm Steel Flat Bar
40x12mm Steel flat bar in S235JR–S355J2, ASTM A36 to EN 10058 / ASTM A6, with an uncoated steel surface suitable for further processing or painting. Nominal weight 3.77 kg/m.
Minimum order
Minimum 5 t per size. Standard length 6 m; other lengths on request. We confirm the grade, tolerances and lead time in your quote.
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Minimum order: 222 pieces
Minimum order: 5,000 kg per size
Applications & Usage
Typical uses for this flat bar: base plates, brackets, stiffeners, frames, railings and general fabrication. Section 12 mm: a solid section that can be cut, drilled, machined and welded. Supplied in the bare mill finish, without coating, which keeps cost down where appearance is secondary. Standard lengths: 6m.
Technical Specifications
| Specification | Value |
|---|---|
| Dimensions | 40mm × 12mm |
| Weight per Meter | 3.768 kg/m |
| Weight of a 6 m length | 22.6 kg |
| Material | Steel |
| Alloy/Grade | S235JR, S275JR, S355JR, S355J2, ASTM A36, ASTM A572, ASTM A615, SAE 1010, SAE 1020, SAE 1030, SAE 1035, SAE 1040, SAE 1045, SAE 1060, ST 37-2, ST 44-2, ST 52-3, ST 60 |
| Standard | EN 10058 / ASTM A6 |
| Available Lengths | 6m |
| Full Stock Length | 6 m |
| Minimum Order per Size | 5 t |
Grades and mechanical properties
Minimum values for a governing thickness of 12 mm.
| Grade | Min. yield | Tensile strength | Min. elongation A (%) | Impact test (KV) |
|---|---|---|---|---|
| S235JREN 10025-2 | 235 MPa | 360–510 MPa | 26 | 27 J at +20 °C |
| S275JREN 10025-2 | 275 MPa | 410–560 MPa | 23 | 27 J at +20 °C |
| S355JREN 10025-2 | 355 MPa | 470–630 MPa | 22 | 27 J at +20 °C |
| S355J2EN 10025-2 | 355 MPa | 470–630 MPa | 22 | 27 J at −20 °C |
| ASTM A36 | 250 MPa (36 ksi) | 400–550 MPa (58–80 ksi) | 20 (200 mm) / 23 (50 mm) | — |
| ASTM A572 Gr. 50 | 345 MPa (50 ksi) | ≥ 450 MPa (≥ 65 ksi) | 18 (200 mm) / 21 (50 mm) | — |
SAE 1010–1060 and the ST 37-2 to ST 60 designations are supplied to chemical composition; their mechanical properties depend on the delivery condition and are confirmed per order. ASTM A615 is a reinforcing-bar standard, quoted on request. Impact values apply from 6 mm; for thin sections (EN below 3 mm, ASTM below 8 mm) the elongation requirement follows separate rules and is given in the test certificate. ASTM A572 values are for Grade 50; please confirm the grade in your enquiry.
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Technical guides
Structural steel grades: S235JR, S275JR, S355JR, S355J2 and ASTM A36, A572 and A992 compared
Minimum yield and tensile strength, impact test temperatures and carbon equivalent of EN 10025-2 grades S235JR, S275JR, S355JR and S355J2, the old St37 and St52 names, and how ASTM A36, A572 Grade 50 and A992 compare.
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Weight per metre of steel flat, round, square and hexagon bar and equal angles 18×18 to 120×120, with the formulas behind each table and the weight of a 6 m bar.
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Read the guide →Metal weight calculator
Free metal weight calculator: kg/m and total weight of steel, stainless and aluminium tubes, bars, angles and sheet. Formulas and densities explained.
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