Certificates and Approvals
ISO 9001 / EN 9100
Steinmeyer maintains a quality system audited according to ISO 9001 and AS/EN 9100 and approved by Liebherr Aerospace under ASD-EASE. Several aerospace and non-aerospace customers have audited our quality system as well.
Non-Destrictive Testing (NDT) and other special processes are outsourced to partners with the necessary qualifications, including NADCAP certificates. For each program, we establish a list of approved suppliers, which is to be confirmed by the customer. We control the quality procedures of our suppliers through process standards, which become part of the purchase orders.
Steinmeyer has a lab equipped to make metallurgical sections and test specimens for microhardness accodding to AMS / AMST standards. We verify and validate heat treatment through sections which are tested for hardness propfile and stored for future reference. Chemical composition of our materials is tested periodically by an outside lab to verify the accuracy of the certificates from our Steel suppliers. In certain cases, we machine standard tensile strength specimens, which are then heat treated together with each lot of parts and tested for strength.
Grinder burn inspection
Nital etching of heat treated Cronidur® (AMS 5898) parts is not possible due to the chemical composition of this steel. Steinmeyer uses Barkhausen noise analysis instead to test shafts and nuts made from Cronidur. This allows reliable detection of stresses up to 50 micron deep in the surface of parts.