OS OS OD OD OD OD OS OS OS OF AM AM AL OG OT ZB SK ZN ZT OD OZ OR OI NA SH II II OI NA II II NP OI
Equivalent Grade C-30 C-30 C-40 / C-45 / MC-11 MC-11/Trial MC-12 C-55 / MC-12 MC12/ Trial D D D D SAE1006 / D D D G - 3102 D D D D EDD EDD2AC D D D D EDD EDD EDD IF ST52AM ST52AM ST52AL C - 62 C - 62 C -80 / EN42J C-80 C-80 C -98 C -98 SKS51 75Ni8 SAE1026 SAE1006 D 50CRV4 15CR3 SAE1010 ST42 GR1 Class-1/Trial GR-2/Trial GR-2 GR-2 GR-2 GR1 IS1079D GR -2 GR-2 GR-2 GR-2 GR-2 O WG WG 1 TO 4
Grade Prefix Equivalent Grade ZW WGH OR SAE 1008 10748GR3 ZP 10748GR3 OQ Fe 510 BQ K1GR2SIK WG OI WG SAE1020 OV SAE 1020 K3-SAE1020 KS K3-SAE1020 OJ Fe440B 2L E - Stamp 2L E-stamp OX SAE1541 OX SAE1541 OX SAE1541/Trial OK CORTON(RL48AL ) ST ST41 ZM MA( SH41 ) 75cr1 ZC 75cr1 OD D OI WG D OD D OD D OI GR1 ZM MA( SH41 ) OK CORTON Grade Prefix OD OI II OI OV OS NA OC OG OG OH OE OX ZT SH OT AL OT OZ ZC ZN KS IS NA NA
Equivalent Grade D D D WG GR2 GR1 SAE1020 EDD Class1 trial C30 C62 C62 MC11 MC12 SAE1541 SAE1026 GR2/Trial C75 ST52-Less Si% C80 50CRV4 75cr1 75Ni8 SAE1020 IS2062 Class1 trial Class1 trial
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