NBN 830-02 FNG50-7 (Belgium)
GB 1348(88) QT 500-7 (China)
DS 11303 727 (Denmark)
AFNOR NFA32201 FGS500-7 (France)
DIN WNr 0.7050 (Germany)
DIN 1693 GGG-50 (Germany)
IS 1865 SG500/7 (India)
UNI 4544 GS500-7 (Italy)
JIS G5502(95) FCD50 Class 3 (Japan)
NEN 2733 GN500-7 (Netherlands)
NS 11301 NS11350 (Norway)
AS 1831(85) 500-7 (NSW Australia)
GOST 7293 VCh50 (Russian Federation)
SABS 936 SG50 (South Africa)
SIS 140727 0727-02 (Sweden)
ISO 1083(87) 500-7 (International)
BS 2789 500/7 (United Kingdom)
ASTM A536(93) 80-55-06 (USA)
SAE J434 D5506 (USA)