China Stainless Steels Suppliers – Reference Material For Chemical Testing – Shandong Institute of Metallurgical Science

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Table 1. Certified Values for GSB 03-2027-2006 (Mass Fraction %)

Number	Elements	TFe*	FeO	SiO₂	Al₂O₃*	CaO	MgO	S
GSB 03-2027-2006	Certified Values	72.01	28.63	0.158	0.095	0.025	0.042	0.0028
GSB 03-2027-2006	Uncertainty	0.09	0.10	0.004	0.005	0.003	0.002	0.0004
Number	Elements	P*	Mn	Ti*	K₂O	Na₂O*	Cu	Ni
GSB 03-2027-2006	Certified Values	0.0013	0.043	0.028	0.0068	0.0008	0.0007	0.0022
GSB 03-2027-2006	Uncertainty	0.0003	0.002	0.003	0.0005	0.0002	0.0002	0.0002
Number	Elements	Co	As*	Pb	Zn	Cr
GSB 03-2027-2006	Certified Values	0.0008	0.00012	0.0002	0.0026	0.0062
GSB 03-2027-2006	Uncertainty	0.0001	0.00003	0.0001	0.0003	0.0004

Note : * Indicates that it is not within the recommended scope for production proficiency of RMP

Table 2. Analysis Methods

Composition	Method
TFe	Titrimetric method after tin(Ⅱ) chloride reduction Titanium(Ⅲ) chloride reduce potassium dichromate titration method
FeO	Potassium dichromate titration method Potentiometric titration method
SiO₂	The silicomolybdic blue spectrophotometric method ICP-AES
CaO	AAS ICP-AES
MgO	AAS ICP-AES
Al₂O₃	The chrome azurol S photometric method ICP-AES
Ti	ICP-AES Diantipyrylmethane spectrophotometric method
Mn	ICP-AES AAS Potassium periodate spectrophotometric method
P	N-butyl alcohol-chloroform extraction molybdenum blue spectrophotome-tric method The butyl acetate extraction photometric method ICP-AES
S	High frequency combustion infrared absorption method Combustion iodometric method
K₂O	ICP-AES AAS
Na₂O	ICP-AES AAS
Cu	ICP-AES AAS GFAAS
Ni	AAS GFAAS ICP-AES
Co	AAS GFAAS ICP-AES
As	GFAAS HG-ICP-AES ICP-AES
Pb	GFAAS AAS ICP-AES ICP-MS
Zn	ICP-AES AAS
Cr	AAS GFAAS ICP-AES

Expiration of certification: The certification of this CRM is valid until January 31, 2023.

Table 3. Methods for homogeneity testing

Composition	Analysis methods	Minimum sample (g)
TFe	Titanium(Ⅲ) chloride reduce potassium dichromate titration	0.2
FeO	Potassium dichromate titration	0.2
S	High frequency combustion infrared absorption method	0.5
Al₂O₃	ICP-AES	0.1
K₂O, Na₂O,P	ICP-AES	0.5
CaO, MgO, Mn, Ti, Cu, Zn, Cr, Pb, As, Co, Ni, SiO₂	ICP-AES	0.2

National Steel Materials Testing Centre

Technology Center of Benxi Iron & Steel Group Co., Ltd

Yantai Branch,52 Institure of China Industries Group

Wuhan Iron and Steel Group Technology Center Inspection

Baoshan Iron & Steel Co., Ltd. Special Steel Branch

School of Chemistry and Chemical Engineering, Shandong University

Shandong Metallurgical Research Institute Test Center

Shandong Metallurgical Product Quality Supervision and Inspection Station

Jinan Iron and Steel Group Corporation

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304 Stainless Steel