Chemical&Mechanical parameters
 	 			Grade 			C 			Mn 			Si 			Cr 			Mo 			S 			P 		
 			20G 			0.17~0.23 			0.35~0.65 			0.17~0.37 			--- 			--- 			≤0.020 			≤0.025 		
 			20MnG 			0.17~0.23 			0.70~1.00 			0.17~0.37 			--- 			--- 			≤0.020 			≤0.025 		
 			25MnG 			0.22~0.29 			0.70~1.00 			0.17~0.37 			--- 			--- 			≤0.020 			≤0.025 		
 			12CrMoG 			0.08~0.15 			0.40~0.70 			0.17~0.37 			0.40~0.70 			0.40~0.55 			≤0.020 			≤0.025 		
 			15CrMoG 			0.12~0.18 			0.40~0.70 			0.17~0.37 			0.80~1.10 			0.40~0.55 			≤0.020 			≤0.025 		
 			SA-210A1 			≤0.27 			≤0.93 			≥0.10 			--- 			--- 			≤0.035 			≤0.035 		
 			SA-210C 			≤0.35 			0.29~1.06 			≥0.10 			--- 			--- 			≤0.035 			≤0.035 		
 			SA-213T2 			0.10~0.20 			0.30~0.61 			0.10~0.30 			0.50~0.81 			0.44~0.65 			≤0.025 			≤0.025 		
 			SA-213T12 			0.05~0.15 			0.30~0.61 			≤0.50 			0.80~1.25 			0.44~0.65 			≤0.025 			≤0.025 		
  
 	 			Grade 			T(MPa) 			Y(MPa) 			E(%) 			Hardness 		
 			20G 			410~550 			245 			≥24 			--- 		
 			20MnG 			≥415 			≥240 			≥22 			--- 		
 			25MnG 			≥485 			≥275 			≥20 			--- 		
 			12CrMoG 			410~560 			≥205 			≥21 			--- 		
 			15CrMoG 			440~640 			≥235 			≥21 			--- 		
 			SA-210C 			≥415 			≥255 			≥30 			≤143HBW 		
 			SA-210A1 			≥485 			≥275 			≥30 			≤179HBW 		
 			SA-213T2 			≥415 			≥205 			≥30 			≤163HBW 		
 			SA-213T12 			≥415 			≥220 			≥30 			≤163HBW 		
 

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Grade	C	Mn	Si	Cr	Mo	S	P
20G	0.17~0.23	0.35~0.65	0.17~0.37	---	---	≤0.020	≤0.025
20MnG	0.17~0.23	0.70~1.00	0.17~0.37	---	---	≤0.020	≤0.025
25MnG	0.22~0.29	0.70~1.00	0.17~0.37	---	---	≤0.020	≤0.025
12CrMoG	0.08~0.15	0.40~0.70	0.17~0.37	0.40~0.70	0.40~0.55	≤0.020	≤0.025
15CrMoG	0.12~0.18	0.40~0.70	0.17~0.37	0.80~1.10	0.40~0.55	≤0.020	≤0.025
SA-210A1	≤0.27	≤0.93	≥0.10	---	---	≤0.035	≤0.035
SA-210C	≤0.35	0.29~1.06	≥0.10	---	---	≤0.035	≤0.035
SA-213T2	0.10~0.20	0.30~0.61	0.10~0.30	0.50~0.81	0.44~0.65	≤0.025	≤0.025
SA-213T12	0.05~0.15	0.30~0.61	≤0.50	0.80~1.25	0.44~0.65	≤0.025	≤0.025

Grade	T(MPa)	Y(MPa)	E(%)	Hardness
20G	410~550	245	≥24	---
20MnG	≥415	≥240	≥22	---
25MnG	≥485	≥275	≥20	---
12CrMoG	410~560	≥205	≥21	---
15CrMoG	440~640	≥235	≥21	---
SA-210C	≥415	≥255	≥30	≤143HBW
SA-210A1	≥485	≥275	≥30	≤179HBW
SA-213T2	≥415	≥205	≥30	≤163HBW
SA-213T12	≥415	≥220	≥30	≤163HBW