4340 vs 4140

4340 vs 4140

4340 VS 4140 different of chemical

	C	Si	Mn	S	P	Cr	Mo	Ni
4340	0.38-0.43	0.15-0.35	0.60-0.80	≤0.040	≤0.035	0.70-0.90	0.20-0.30	1.65-2.00

 

	C	Si	Mn	S	P	Cr	Mo	Ni
4140	0.38-0.43	0.15-0.35	0.75-1.00	≤0.040	≤0.035	0.80-1.10	0.15-0.25	/

4340 vs 4140