INTERSTAHL receives certification of conformity to DIN EN ISO 9001:2015 and 3834-2:2006

Certification according to DIN EN ISO 9001 confirms the efficiency of our quality management system. The quality management system ensures the you only receive parts that have been made fully conforming to your requirements.

Additionally the certification according to DIN EN ISO 3834-2 verifies our adherence to quality standards for welded gate valves for pipeline construction.

New product: deep hole drilling

Complex workpieces often require drilled holes with a high ratio of depth to diameter. Producing such holes requires very high precision manufacturing process since small angular deviations can lead to large deviations from the drilling path and non-compliance with tolerance limits.

Deep holes can be drilled on standard CNC milling machines or lathes; however, there are also specialized deep hole drilling machines. Drilling deep holes on standard machines requires special precautions to guarantee a straight drilling path. A centre bore precedes a pilot hole that is drilled with a slightly larger diameter than the final hole and should have a depth of approximately 3xD (diameter). Afterwards a deep hole drill is used to drill the final hole. A special deep drilling machine does not require these additional steps because the drill is supported by a steady rest and centred by a drill bush.

We at INTERSTAHL have recently extended our product spectrum to include deep hole drilling. We are looking forward to your quotation requests.

INTERSTAHL Supports Rotaract Germany Meeting

The Rotaract Germany Meeting will take place from March 24 - 26 in Witten. Rotaract is an organisation of 18 - 30 year old people who engage in social service. The motto of Rotaract in Germany is "Lern - Help - Celebrate". The organsation is a partner of Rotary and is active in over 170 countries worldwide. It has over 3000 members in Germany.

ConferenceDuring the Germany Meeting Rotaractors will support Sprungbrett e.V.. They are going to make paper bags which are sold by Sprungbrett e.V. to support the detention center for young women in Wetter. The facility in Wetter is used for detentions of up to four weeks. Sprungbrett e.V. supports the facility for example by financing a psychologist and providing sports equipment.

We, INTERSTAHL, want to enable the over 1000 young Rotaractors to enjoy a productive weekend in Witten and encourage further social service activities.

TRIP (Transformation Induced Plasticity) Steel

TRIP is a group of low alloy steels with high tensile strength und ductility. TRIPS steel has a triple-phase microstructure consisting of ferrite, bainite and retained austenite. This is achieved using specific alloys and a specialized heat treatment process during manufacturing. The metastable retained austenite is stabilized up to room temperature by the aggregation of carbon during heat treatment.

Cold forming of TRIP steel induces a martensitic transformation of the retained austenite. This transformation improves work hardening and allows for very high deformation degrees. Therefore TRIP steel is especially suitable for complex parts and allows more freedom for the engineers to use the full capacity of the material. The yield strength of TRIP steel is between 340 and 590 MPa.

New machining center for parts with tight tolerances

Interstahl Maschine AWEA BM 1400INTERSTAHL Süd recently received a new machining center, model BM-1400, manufactured by AWEA. It is equipped with stiff linear guides and also features Heidenhain glass scales for maximum precision.

With this new machine we are able to fulfill your high quality demands for parts up to 1400 x 800 x 700 mm. The maximum accuracy of the machine is 0.08 mm.

Steel prices in France starting to recover

According to a report from MEPS steel prices in France are starting to recover. Sales figures for hot rolled coils increased significantly and demand for coated coils also rose. Some users even had to source material from China which is very expensive due to punitive tariffs.

The price increases affected almost every sector; however, they were mainly caused by low inventories. The activity of most users remained low.