Our materials

What is plasma nitration?

Plasma nitriding is a thermochemical diffusion process for surface layer hardening. The surface layer of a workpiece or component is enriched with nitrogen, which forms a wear and corrosion protection layer on the component surface and in the area close to the surface. The manufacturing process takes place under vacuum at around 500 degrees Celsius. In conjunction with additional production steps, we achieve a nearly distortion-free product.

Plasma nitriding is one of the most environmentally friendly hardening processes because only nitrogen, hydrogen and oxygen are required for the hardening process. These gases are the main components of the air. At Siegmund, the required energy is provided exclusively electrically, instead of the fossil fuels that are otherwise customary on the market for heating the components.

Low-wear and durable surfaces

Corrosion resistant

Scratch resistant

Significantly less welding spatter adhesion

BAR-Coating

Unique to Siegmund is the subsequent BAR coating of the welding tables and many tool parts, which takes place after plasma nitriding. The BAR coating (Black-Anti-Rust Coating) additionally planes the surface and increases protection against rust.

Reinforced rust protection

Additional grading of the surfaces

Proven surface finish

Siegmund's plasma nitriding is a proven surface treatment for our welding tables. The thermochemical process leads to surfaces that are more wear-free, corrosion-resistant and durable. Welding spatter adheres significantly less to a table with plasma nitriding than to welding tables without plasma nitriding. As a result, the surface evenness is better preserved even after years. Due to the significant increase in service life and the increased resilience of the welding tables by around 20-30%, plasma nitriding is always worthwhile.

Materials in comparison

With our evaluation, we would like to make it easier for you to compare the different materials and to support you in selecting the right welding table.

Basic hardness

Surface hardness

Impact-proof

Scratch-proof

Protection against weld spatter

Corrosion resistance

Point load

Flatness in its new state

Maintenance of the flatness under heavy use

Life span

Siegmund welding tables and perforated plates

Steel S355J2+N

(without Plasma nitration)

★★

★

★★★

★★★★★★★

★

★★

Basic 750

Steel S355J2+N

(with Plasma nitration)

★★

★★★★★★

★★★

★★★★

★★★★★★

★★★★

★★★★★★★

★★★

★★★★★

Basic 750

Professional 750

Perforated Plates

Professional 750

Perforated Plates

Professional 750

Perforated Plates

Tool Steel X8.7

(with Plasma nitration)

★★★★★★

★★★★★★★★

★★★★★★★

★★★★★★

★★★★★★★

★★★★★★

★★★★★★★

★★★★★

★★★★★★

Extreme 8.7*

Extreme 8.7 PLUS*

Perforated Plates

Extreme 8.7*

Extreme 8.7 PLUS*

Basic 8.7

Extreme 8.7*

Hexagon Slot Table*

Perforated Plates

Tool Steel X8.8

(with Plasma nitration)

★★★★★★★★

★★★★★★★★★★

★★★★★★★★

★★★★★★★

★★★★★★

★★★★★★★

Extreme 8.8 PLUS*

* Table side panel made of steel S355J2+N

Basic hardness

Approximate Vickers Hardness

= premium steel S355J2+N
= Through-hardened tool steel X8.7
= Through-hardened tool steel X8.8

A high basic hardness is crucial for high impact resistance and the long service life of a welding table. The subsequent plasma nitration and BAR coating results in a surface refinement that hardens the material and protects it from scratches, corrosion and weld spatter adhesion. Only the combination of high basic hardness and plasma nitriding results in a low-wear and durable surface.