The original for precision flat steel
Traditionally forward-looking.
For over 100 years, we have been developing precision flat steel in accordance with DIN 59350, which serves as a reliable basis for precise tools and high-performance machine parts. Scale-free surfaces, the tightest tolerances, and maximum dimensional accuracy ensure the efficiency and quality of your manufacturing processes. Whether standard lengths from stock or custom dimensions made to measure – you always receive long-lasting precision that noticeably advances your applications.
PRÄZI flat steel
| Features | Scale-free surface, annealed condition |
| Execution | in partial lengths of 500 and 1030 mm, with machining allowance in special dimensions ("cut-to-size") on request |
| Tolerances | Dimensional accuracy (LxWxD), flatness, angularity, parallelism according to DIN 59350, all details in our Technical Delivery Conditions |
| Applications | Forming tools, punching tools, machine parts, standard parts, construction elements |
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material selection
We deliver over 10,000 dimensions in around 20 material grades directly from stock.
High-alloy steel
Cold work steel 1.2379 | AISI D2
PRÄZI Flachstahl® 1.2379 impresses with its toughness, wear resistance, low distortion and nitridability. Perfect for cutting and punching tools, shearing knives, trimming dies, cutting rollers and breakage-sensitive parts.
Air-hardening cold work tool steel 1.2363 | AISI A2
PRÄZI Flachstahl® 1.2363 offers high wear resistance, toughness, dimensional stability during heat treatment and good compressive strength. Ideal for cutting and punching tools, rollers, shear blades, thread rolling dies, embossing tools, calibration mandrels, measuring tools and plastic molds.
Cold work steel 1.2083 | AISI 420
PRÄZI Flachstahl® 1.2083 is a corrosion-resistant, easily machinable cold-work tool steel that is easy to harden and polish. Ideal for molds, pressing tools and applications in the plastics industry.
Cold work steel 1.2436 | AISI D6
PRÄZI Flachstahl® 1.2436 offers maximum hardness and wear resistance. Ideal for cutting and embossing tools, broaches, punches, pressing and bending tools, folding rails and knives.
Hot-work tool steel 1.2343 | AISI H 11
PRÄZI Flachstahl® 1.2343 has high toughness, hot wear resistance, excellent thermal conductivity and good air hardenability. They can be nitrided, polished and eroded. Ideal for die casting knives, extrusion knives, hot shear knives, cold shear knives, forging tools and other hot work tools.
Hot-work tool steel 1.2343 ESU | AISI H11 ESR
PRÄZI Flachstahl® 1.2343 ESU offers high toughness, hot wear resistance, excellent thermal conductivity and good air hardenability. They can be nitrided, polished and eroded. Ideal for die casting knives, extrusion knives, hot shear knives, cold shear knives, forging tools and other hot work tools.
Hardened and tempered steel 1.2085 | AISI 420 FM
PRÄZI Flachstahl® 1.2085 is a corrosion-resistant tool steel with improved machinability compared to 1.2316. Ideal for mold frames and tools for processing corrosive plastics.
Tool steel 1.3343 | AISI M2
PRÄZI Flachstahl® 1.3343 is a highly wear-resistant tool steel with high toughness, compressive strength and heat resistance. Ideal for cutting tools, milling cutters, drills, circular saw segments, metal saws, woodworking tools, dies, punches and plastic molds with high wear resistance.
Stainless steel 1.4112 | AISI 440B
PRÄZI Flachstahl® 1.4112 is a hardenable, easily machinable, polishable and corrosion-resistant stainless steel. Ideal for plastics processing, tools in the food industry, knives, cutlery, ball bearings and spray nozzles.
Low-alloy steel
Cold work steel 1.2767 | AISI 6F 7
PRÄZI Flachstahl® 1.2767 is a tough, hardenable tool steel with a high nickel content. It offers excellent polishability, photoetchability and erodibility. Ideal for mold inserts, plastic and injection molds, bending tools, pressure bars and shear blades.
Cold work steel 1.2842 | AISI 02
PRÄZI Flachstahl® 1.2842 impresses with its outstanding dimensional stability, high edge retention and excellent wear resistance.
This cold work tool steel is ideal for jigs and fixtures, gauges, templates, rulers, punching tools, measuring tools, precision parts and guide rails.
Heat treatable steel 1.7225 | AISI 4140
PRÄZI Flachstahl® 1.7225 offers high strength and toughness in the quenched and tempered condition and can be induction hardened. Ideal for mechanical engineering, machine parts, axles, connecting rods, crankshafts, gear shafts, gear wheels and base plates.
Tempered plastic mold steel 1.2311 | AISI P 20
PRÄZI Flachstahl® 1.2311 can be easily polished, nitrided, chromium-plated and grained. Ideal for the production of plastic molds and mold frames for plastic and die casting molds.
Tempered plastic mold steel 1.2312 | AISI P 20+S
PRÄZI Flachstahl® 1.2312 offers excellent machinability and nitriding properties. Ideal for plastic molds and mold frames for plastic and die casting molds. Not suitable for etching, polishing, hard chrome plating or graining.
case hardening steel 1.7131 | AISI 5115
PRÄZI Flachstahl® 1.1731is a tough case hardening steel with good machinability in the soft annealed condition and excellent case hardenability. It is ideal for parts subject to wear such as gears, shafts, bolts, bushes, guides and fittings.
case hardening steel 1.2162 | AISI 5120
PRÄZI Flachstahl® 1.2162 is easy to machine, easy to polish and can be nitrided after heat treatment. It offers high toughness in the core and surface hardness. Ideal for tools in plastics processing, pinions, gear wheels, gear racks, machine parts and guides.
Material TOOLOX® 33
PRÄZI flat steel tolerances according to DIN 59350, tempered to 950-1125 N/mm2
Material TOOLOX® 44
PRÄZI flat steel tolerances according to DIN 59350, hardened to 45 HRC, ground on all sides without decarburization with Ra max. 4 µm.
Unalloyed steel
Unalloyed tool steel 1.1730 | AISI SAE 1045
PRÄZI Flachstahl® 1.1730 is an easily machinable shell hardener with a hard surface and tough core. Ideal for build-up plates and strips for plastic molds, blow and foam molds, hand tools and agricultural tools.
Unalloyed structural steel 1.0570 / 1.0577 | AISI A 106
PRÄZI Flachstahl® 1.0570 / 1.0577 is a construction material with very good weldability. Ideal for mechanical engineering, intermediate layers and base plates in stamping and mold making.
Perfect surfaces
& tightest tolerances
Precise tolerances for direct processing
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Efficient further processing
Maximum planning reliability
No milling or grinding required
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Faster turnaround times
Limitless possibilities
Custom dimensions
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Around 20 material grades
Technological possibilities & consulting
Choosing the right raw material influences every stage of your process chain. Precise, low-tension flat steel from Präzi reduces machining costs, protects your tools, and increases repeat accuracy in series production. This allows you to sustainably increase the quality, stability, and service life of your end products. As an experienced partner, we support you with technological expertise and sound advice—for greater efficiency and reliability in your value creation.
Your guide to standard dimensions
Your consultation for individual needs
Your consultation for individual needs
FAQ
Here you will find answers to frequently asked questions. For detailed technical data or
price information, please visit our online shop directly.
What distinguishes precision flat steel from conventional flat steel?
Unlike crude steel, precision flat steel is pre-machined and manufactured to significantly tighter tolerances in accordance with DIN 59350. This ensures high dimensional accuracy, flatness a scale-free surface, allowing the steel to be used directly in production without extensive reworking.
What tolerances apply to PRÄZI precision flat steel?
The tolerances for our precision flat steel are regulated by the DIN 59350 standard. For widths under 300 mm, the permissible dimensional deviation for thickness is generally 0/+ 0.05 mm. Parallelism and angularity are also precisely maintained.
What is precision flat steel typically used for?
Precision flat steel is primarily used in areas that require maximum precision, such as cutting and embossing tools, stamps, pressing tools, bending rails, knives, or machine parts.
In which materials can I purchase precision flat steel?
We offer a wide range of materials, including corrosion-resistant, tempered, and untempered tool steels, cold, hot, and high-speed steels, as well as plastic mold steels.
Does the PRÄZI GROUP also offer flat PRÄZI GROUP as cut-to-size parts?
Yes, in addition to standard lengths (e.g., 500 mm or 1030 mm), we also manufacture special dimensions and cuts according to your individual specifications on request.
How quickly can the PRÄZI GROUP deliver PRÄZI GROUP ?
If a desired dimension is not in stock, we manufacture special dimensions with minor dimensional deviations from standard program within 2 to 5 business days.