1.ASTM/ASME: A 53,  Grade A&B  
 A 106,  Grade A,B&C 
 A 178,  Grade A, C&D 
 A 179,  Low Carbon Steel 
 A 192,  Low Carbon Steel 
 A 209,  Grade T1, T1a&T1b 
 A 213,  T5,T11,T12,T22,T91,T92
 A 333,  Grade 1&6 
 A 334,  Grade 1&6 
 A 335,  P5,P11&P22,P91,P92
 A 500,  Grade A,B,C&D 
 A 513,  Low Carbon Steel 
 A 519,  1008,1010,1020,1026,1035,1045,1050,1518,1524,1541,4118,4130,4135,4140,4142,5115,5120,5140,52100

2.AMS: ASM-T-6736,4130 

3.SAE: J524, Low Carbon Steel    J525, Low Carbon Steel 

4.DIN: DIN 2391, ST30Si, ST35, ST45, ST52 
  DIN 2393, RST34-2, RST37-2, ST44-2, ST52-3 
  DIN 2394, RST34-2, RST37-2, ST44-2, ST52-3 
  DIN 17175, ST35.8, ST45.8, 17Mn4, 19Mn5, 15Mo3, 13CrMo44, 13CrMo910
  DIN 2448/1629/1630, ST37/ST37.4, ST44/ST44.4, ST52/ST52.4 
  DIN 2458/1626/1628, ST37/ST37.4, ST44/ST44.4, ST52/ST52.4 

5.BS: BS3059, 320,360,440,243,620-460,622-490 
  BS6232, CFS3,CFS3A,CFS4,CFS5,CFS6,CFS7,CFS8,CFS9,CFS10,CFS11

6.EN: EN10305-1,  E215, E235, E355, 26Mn5, C35E, C45E, 26Mo2, 25CrMo4, 42CrMo4 
  EN10305-2, E155, E195, E235, E275, E355 
  EN10305-4, E215, E235, E355

7.SAE52100/100Gr6/GGr15
  Advantages:    Tight size tolerance with special smooth surface

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