01 / INPUT
Material & traceability
Through-hardening bearing steel is identified by heat number from receipt through dispatch.
Quality gates
Quality is a route, not a promise.
Full traceability and process control happens across the bearing steel seamless tube production using Heat Numbers.
100% NDT in the factory filmCurrent quality certification
IATF 16949:2016 with inspection built into production.
Microtech now holds IATF 16949:2016. 100% non-destructive testing combines 16-probe rotary Ultrasonic Testing with automatic Eddy Current Testing.
Heat-number traceability is maintained from raw-bar receipt through finished-tube dispatch, supported by in-house metallurgy, spectroscopy and hardness testing.
Quality focus: product-specific tolerance, grade, PPM, delivery and rejection figures are confirmed by the quality team.
In-house laboratory: Olympus BX53M microscopy, GNR optical-emission spectroscopy, Rockwell and Brinell hardness testing, plus EECI manual UT verification.
Control points
What a customer can verify.
Quality controls stay connected from incoming bar to finished dispatch.
02 / PROCESS
Heat treatment control
Continuous spheroidizing annealing uses a controlled N₂ atmosphere and defined release criteria.
03 / SURFACE
Surface condition
Surface treatment and cold work prepare the tube for stable downstream bearing production.
04 / NDT
100% online inspection
16-probe rotary UT and automatic Eddy Current Testing inspect every tube.
05 / LAB
In-house verification
Metallurgy, optical emission spectroscopy, Rockwell and Brinell hardness testing support release.
06 / RELEASE
Lot release
Automatic marking, sorting, packing and dispatch documentation keep finished lots identifiable.
Connected shop floorQuality documentation
Documentation for supplier qualification.
Quality documentation helps customers review the process, inspection controls and release requirements.
- IATF 16949:2016 certificate and scope
- Calibration and inspection equipment records
- Sample inspection report or dimensional record
- Customer-specific quality agreement workflow
- Technical and quality enquiry support
Need quality documentation?
Use the enquiry form to request the right quality conversation and identify the tube specification you are qualifying.