CHEMICAL

Name of Elements	Grade-wise percent constituents
	SCRM 500W TMT	SCRM G400	SCRM G40
Carbon(C)	0.18-0.22	0.28-0.38	0.20-0.25
Manganese (Mn)	0.70-0.74	1.00-1.35	0.75-0.90
Silicon (Si)	0.25 Max	0.25 Max	0.25 Max
Sulfur(S)	0.04Max	0.04Max	0.04Max
Phosphorus (P)	0.04 Max	0.04 Max	0.04 Max
Copper(Cu)	0.10 Max	0.1Max	0.10 Max

The above chemical composition confirms the following AISI-SAE Standards:

			AISI-SAE Standard Carbon Steel Composition(Grade 60-400)
AISI-SAE Number	UNS Number	Composition	Composition	Composition	Composition
		C	Mn	P(max)**	S(max)**
Nonresulfurized Grades — Over 1 per cent Mn	Nonresulfurized Grades — Over 1 per cent Mn	Nonresulfurized Grades — Over 1 per cent Mn	Nonresulfurized Grades — Over 1 per cent Mn	Nonresulfurized Grades — Over 1 per cent Mn	Nonresulfurized Grades — Over 1 per cent Mn
1522	G15220	0.18–0.24	1.10–1.40	0.040	0.050
1524	G15240	0.19–0.25	1.35–1.65	0.040	0.050
1526	G15260	0.22–0.29	1.10–1.40	0.040	0.050
1527	G15270	0.22–0.29	1.20–1.50	0.040	0.050

		AISI-SAE Standard Carbon Steel Composition(Grade 40-300 & TMT 72.5-500)
AISI-SAE Number	UNS Number	Composition	Composition	Composition	Composition
		C	Mn	P(max)**	S(max)**
		Non-resulfurized Grades — 1 per cent mn (max)
1018	G10180	0.15–0.20	0.60–0.90	0.04	0.05
1019	G10190	0.15–0.20	0.70–1.00	0.04	0.05
1021	G10210	0.18–0.23	0.60–0.90	0.04	0.05
1022	G10220	0.18–0.23	0.70–1.00	0.04	0.05