Flat Bar, Sized to Your Specification
Hot-rolled, forged and cold-drawn flat and square bars, available from stock or sourced on short notice. Certified stockholder and processing facility to AS/EN 9100 and AS/EN 9120.
Request a QuoteFlat Bar for Demanding Components
Our flat and square bar stock spans a wide range: from precipitation-hardening stainless steels to low-alloy quenched and tempered steels, plus selected maraging and spring steels. Part of the range is available today in specific fixed sizes; the wider spectrum of materials and dimensions we source for you on short notice.
Cut lengths are supplied up to 550 mm width to your specification, including a 3.1 mill certificate to EN 10204 and export-ready packaging to IPPC standard. For details on our processing capabilities, see the Processing & Custom Services section.
In addition to steel grades, we also source and stock flat bar in aluminium and nickel-base alloys such as Inconel® on request.
- Product Form
- Flat bar, hot-rolled, forged or cold-drawn
- Thickness Range
- approx. 1.3 – 120 mm*
- Width Range
- approx. 13 – 410 mm*
- Certificate
- 3.1 mill certificate (EN 10204)
- Certification
- AS/EN 9100 & AS/EN 9120
- On Request
- Aluminium & nickel alloys (e.g. Inconel®)
*Based on our current stock levels; guide values, dependent on grade and availability — see the dimensions table for details.
Five Alloys That Shape Our Flat Bar Programme
These five materials define our flat bar range and are regularly available in common fixed sizes or on short lead time.
Martensitic precipitation-hardening chromium-nickel-copper steel with high strength combined with good toughness and corrosion resistance. Held in our flat bar stock in condition H1025, among others, across numerous fixed sizes.
Precipitation-hardening chromium-nickel-copper steel with a broad property range depending on heat-treatment condition. Carried in our flat bar programme both as-delivered (Cond. A) and precipitation-hardened (H1025).
High-strength precipitation-hardening stainless steel with particularly good toughness at high strength — suited to highly stressed, safety-critical flat components in aerospace and defence. Stocked in condition H1050, among others.
Low-alloy chromium-molybdenum-vanadium steel, readily weldable and heat-treatable, with high strength at low weight. Available as flat material quenched and tempered, including condition T1080 — proven in frame and structural construction.
Low-alloy quenched and tempered steel with a balanced combination of strength, toughness and weldability — one of our core programmes across all product forms. As flat material, available on short notice drawing on our extensive tube and round bar stock, or sourced on request.
Flat Bar Grades in Current Stock
This overview reflects our current, day-to-day flat bar stock. Grades not listed and special dimensions are gladly sourced on request.
| German Grade (Werkstoffnummer) | International Grade | Specifications |
|---|---|---|
| 1.4044 | SAE 431 / FE-PM42 | MIL-S-18732 / DIN65038 / AIR9160C |
| 1.4307 | AISI 304L / Z3CN18-10 | EN 10088-3 / AMS5647 / AFNOR |
| 1.4534 | PH13-8Mo / FE PM 67 | DIN65038 / EN3357 / EN3358 / EN3470 / EN3486 / AMS5629 |
| 1.4542 | 17-4PH | EN10088-1 / AMS5622 (Cond. A) |
| 1.4545 | 15-5PH / FE-PM64 | DIN65038 / AMS5659 (H1025/H1100) / EN2815 / EN2816 |
| 1.4548 | 17-4PH / FE-PM61 | DIN65038 / EN2539 / AMS5622 (H1025) |
| 1.4006 | AISI 410 / X10Cr13 | EN10088-2 / AMS5504 |
| 1.6354 | Maraging 300 / X2NiCoMo18-9-5 | AMS6514 / AMS6521 |
| 1.7734 | 15CDV6 / FE-PL52 | DIN65038 / AIR9160C / EN2213 / EN2214 / EN2249 / EN2252 / ASNA3120 / ASNA3192 / ASNA3193 |
| 1.8159 | 51CrV4 | EN10089 |
| — | BS S99 (British Standard) | Standards & conditions on request |
| — | Grade 250 Type IV (Maraging 18Ni250) | AMS6512, standards on request |
| — | S162D (special alloy, aged) | Standards on request |
| — | SAE 4130 (Cond. N / D1) | AMS6345 / MIL-S-6758 |
| — | SAE 4340 (quenched and tempered) | AMS6415 |
Additional grades as well as aluminium, nickel and titanium alloys (e.g. Inconel®) available on request. Materials without a Werkstoffnummer are British/US specialty steels from our stock — further technical data on request.
Thickness & Width from Our Stock
The ranges below are based on our current flat bar stock. The actual available combinations of thickness, width and grade vary — please contact us for your specific size.
| Form | Thickness | Width | Note |
|---|---|---|---|
| Cold-drawn / annealed | from 1.3 mm | from 13 mm | Thin gauges, e.g. spring steel (51CrV4) |
| Hot-rolled / quenched & tempered | 10 – 70 mm | 30 – 175 mm | Bulk of stock programme (e.g. 15CDV6, SAE 4130) |
| Forged / special cross-section | 70 – 120 mm | 90 – 410 mm | Large formats, e.g. 15CDV6, SAE 4130 Cond. N |
| Cut-to-length | full range | up to 550 mm | Custom length, saw cut ±1 mm |
Note: These values reflect our current stock and are not a firm commitment. For binding availability of grade, size and condition, please contact your account manager.
Processing & Custom Services
Beyond the raw semi-finished product, we offer processing services that support your project from the outset.
Sawing
Cutting flat bar up to 550 mm width to your required length.
Milling & Surfacing
Precise surface and dimensional machining to drawing.
Heat Treatment
Quenching, tempering, ageing and solution annealing to customer specification.
Material Testing
Chemical analysis, hardness testing, ultrasonic inspection.
Demonstrable Quality on Every Flat Bar Delivery
Our Inspection Programme for Flat Material
Every heat of flat bar goes through a defined inspection programme before release — from visual inspection to independent laboratory testing.
100% Dimensional & Visual Inspection
Every bar is fully checked for dimensional accuracy and surface condition.
Spectrographic Analysis
Material analysis to confirm chemical composition for each heat.
Mechanical Testing
Tensile, hardness and further tests per customer requirement and specification.
Independent Materials Laboratory
Additional testing through an external, accredited laboratory on request.
Marking to Customer Requirements
Identification of heat, grade and dimension per your specification.
100% Documentation
Complete traceability with a 3.1 mill certificate to EN 10204.
Flat Bar — Questions & Answers
Which flat bar grades does Tennant Metall regularly hold in stock?
Our core programme includes 1.4545 (15-5PH), 1.4542/1.4548 (17-4PH), 1.4534 (PH13-8Mo), 1.7734 (15CDV6) and 25CrMo4, among others. We also carry materials such as SAE 4130, SAE 4340, maraging steels and spring steel 51CrV4. See the full overview in the stock programme section above.
Up to what width can flat bar cut lengths be supplied?
We supply flat bar cut lengths up to a width of 550 mm in your required length, including a 3.1 mill certificate to EN 10204.
Does Tennant Metall also supply flat bar in special sizes or less common grades?
Yes. Beyond our listed stock, we source unusual materials, conditions and dimensions on request — please speak to your account manager.
Does Tennant Metall also supply flat bar in aluminium or nickel-base alloys such as Inconel?
Yes. We source and stock flat bar in aluminium alloys (e.g. 6061, 7075) as well as nickel-base alloys such as Inconel® on request.
What certifications apply to flat bar deliveries?
Tennant Metall is certified as a manufacturer/processor to AS/EN 9100 and as a distributor to AS/EN 9120, holds NCAGE number CH223, and has an Airbus approval (ARP ID 203381).
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Castroper Str. 80 · 44628 Herne, Germany · +49 (0) 2323 96540-0 ·
