Assaying parameters as per IS 2830 :

	AP I	AP II	AP III	AP IV
Grades	CARBON (% M/M)	MANGANESE (%M/M)	SULPHUR (%M/M)	PHOSPORUS(%M/M)
C15	0.10-0.20	0.27-0.63	0.055	0.055
C18	0.13-0.23	0.27-0.63	0.055	0.055
C20	0.15-0.25	0.27-0.63	0.055	0.055
C15 MMn	0.10-0.20	0.57-1.03	0.055	0.055
C18 MMn	0.13-0.23	0.57-1.03	0.055	0.055
C20 MMn	0.15-0.25	0.57-1.03	0.055	0.055
C15 HMn	0.10-0.20	0.97-1.83	0.055	0.055
C18 HMn	0.13-0.23	0.97-1.83	0.055	0.055
C20 HMn	0.15-0.25	0.97-1.83	0.055	0.055
C25 HMn	0.32 max	1.83 max	0.065	0.065

 

Notes :

1. For Sulphur and Phosphorous percent content "opto 0.045", ">0.045 and <0.050",">0.050 and <0.055" the steel grade shall have the suffix A,B,C respectively
2. Copper in Copper bearing quality:0.17 to 0.38%
3. Al killed steel: Al>0.02%; Si killed steel: Si>0.01%;, Si-Al killed Steel: Si>0.03% & Al>0.01%
4. N2 <0.012%
5. Limits on carbon Wquivalent (CE) and other required element maybe as agreed to between the purchaser & manufacture
6. Length of billets/blooms & slabs shall be as agreed to between the purchaser & supplier within the range of 3m to 12m
7. tolerances on dimension shall be as per the relevant requirements conained in IS 2830
8. marking ans painting ont he billet ingots, billets, blooms and slabs shall be as per relevant requirements of IS 2830

 

Assaying parameters as per IS 2831 :

	AP I	AP II	AP III	AP IV
Grades	CARBON (% M/M)	MANGANESE (%M/M)	SULPHUR (%M/M)	PHOSPORUS(%M/M)
C08	0.00-0.17	0.27-0.63	0.06	0.06
C15	0.10-0.20	0.27-0.63	0.06	0.06
C22	0.00-0.27	0.00-1.28	0.065	0.08

 

Notes:

1. Al killed Steel: Al> 0.02%; Si killed Steel: Si>0.03%; Si-Al killed Steel: Si > 0.03% & Al > 0.01%
2. If microalloying elements (Nb, V & Ti)- Total content < 0.2%
3. N2 < 0.012%
4. Limits on Carbon Equivalent (CE) and other required elements maybe as agreed to between the purchaser & manufacturer
5. Copper in Copper bearing quality: 0.20 to 0.35%
6. Length of billets/blooms & slabs shall be as agreed to between the purchaser & supplier within the range of 3m to 13m
7. Tolerances on dimensions shall be as per the relevant requirements contained in IS 2831
8. Marking and painting on the billet ingots, billets, blooms and slabs shall be as per relevant requirements of IS 2831.