Alloy structural steel

Name	Brand	Specifications	Executive standard	Chemical composition analysis (melting composition)%						Performance characteristics	Purpose
Name	Brand	Specifications	Executive standard	C	Si	Mn	P ≤	S ≤	Other	Performance characteristics	Purpose
Alloy structural steel	20CrMnTi	Φ18~65	GB/T 3077	0.17-0.23	0.17-0.37	0.80-1.10	0.03	0.03	Cr1.00-1.30 Ti 0.04-0.10	Good mechanical properties and processing properties, and the structure and performance are higher than the relevant requirements of national standards	Gear, shaft, connecting rod and other mechanical parts
	20Cr	Φ18~65		0.18-0.24	0.17-0.37	0.50-0.80	0.03	0.03	Cr 0.70-1.00
	40Cr	Φ18~65		0.37-0.44	0.17-0.37	0.50-0.80	0.03	0.03	Cr 0.80-1.10
	20MnTiB	Φ18~65		0.17-0.24	0.17-0.37	1.30-1.60	0.03	0.03	B 0.0008-0.0035 Ti 0.04-0.10
	20CrMo	Φ18~65		0.17-0.24	0.17-0.37	0.40-0.70			Cr 0.80-1.10 Mo 0.15-0.25
	25CrMo	Φ18~65		0.22-0.29	0.17-0.37	0.60-0.90			Cr 0.90-1.20 Mo 0.15-0.30