Table 3.

Material properties of the pipe components.

Name	Material	$\mathit{\rho }$ (kg/cm3)	$\mathit{E}$ (GPa)	$\mathit{\upsilon }$	${\mathit{\sigma }}_{\mathit{y}}$ (MPa)	${\mathit{\sigma }}_{\mathit{u}}$ (MPa)
Connector	0Cr15Ni5Cu4Nb	7800	190	0.24	200	≥930
Bracket	0Cr18Ni9	7850	199	0.3	205	520
High-pressure pipe	0Cr21Ni6Mn9N	7810	190	0.27	365	735
Oil return pipe
Oil suction pipe	1Cr18Ni10Ti	7900	204	0.3	235	632
Buffer bottle	0Cr15Ni5Cu4Nb	7800	190	0.24	200	≥930
Bolt	30CrMnSiA	7750	196	0.3	835	1080
Clamp	1Cr18Ni9Ti	8030	206	0.3	200	550