1035 steel....
France: AFNOR CC 35
Germany: DIN 1.0501
Italy: UNI C 35
Sweden: SS 1550
United Kingdom: B.S. 060 A 35 , B.S. 080 A 32 , B.S. 080 A 35 , B.S. 080 A 37 , B.S. 080 M 36
United States: AMS 5080 , AMS 5080D , AMS 5082 , AMS 5082A , ASTM A108 , ASTM A29 , ASTM A510 , ASTM A519 , ASTM A544 , ASTM A545 , ASTM A546 , ASTM A576 , ASTM A682 , FED QQ-S-635 (C1035) , FED QQ-S-700 (1035) , SAE J403 , SAE J412 , SAE J414 , UNS G10350
SS stand for Structural Steel,400 for grade, AISI 1018, En 1a, St37 are equivalent steel.
Equivalent material e36
no
API 5l X52
1042/1045
CK22 is the equivalent DIN grade for EN3A
EH 36
1020
q345b is equivalent to grade 50
REQUIRED EQUIVALENT GRADE FOR THIS GRADE sa 516 gr 70 .
SPFH 540 In JIS & FeE355 in ISO
EN 10027 is described for the designation system of steel. So no matched with other nation's steel grade.