Laboratory accredited by GAZ, (Association for the Accreditation and Certification GmbH) Attestation no. 91021

CERTIFIED REFERENCE MATERIAL
SE21-61
unalloyed steel

Version: 002      Date of certification: 08.04.10      Sample form: Milling 0.200-1.400 mm

Analyte Unit Certified value Confidence
interval (95%)		 No. of independent
repeated series		 Measuring
method*		 
  C
  S
  N
 
  %
  %
  %
 
      0.1843
      0.0043
      0.0186
 
      0.0012
      0.0002
      0.0004
 
 3
 3
 3
 
1,2
2
3
* Measuring method
1: Combustion with coulometric detection
2: Combustion with IR-detection
3: Hot extraction with HC and IR detection