320X300 Big Size Cold Drawn Steel Tube Pneumatic Cylinder Pipe

• Temperature Classification: Medium Temperature Piping
• MPa Classfication: Medium Pressure Piping
• Material: Carbon Steel
• Standard: ASTM, GB, API, DIN, JIS
• Diameter: ID20 to 500mm
• Cross-Section Shape: Round
• Model NO.: 320x300
• Connection Type: Seamless
• Process: Cold Drawn
• Transport Package: in Bundel, with Plastics on Both Ends, Oil Coated
• Specification: ID20-500
• Trademark: BAIHENG
• Origin: China
• HS Code: 73049000
• Production Capacity: 1000 Ton Per Month

Product Description

Description :  cold drawn steel pipes, cold drawn tubes are precision tubes with exact tolerance on OD and ID. When hot finished tubes can not meet requirement on OD and ID tolerance, we will cold drawn the hot rolled tubes to get better tolerance. They are also called ready to hone or ready to skive tubes.

Popular standard and steel grade:

EN10305-1	E355 E235 E410 E470 C45E
DIN2391-1	ST52 ST45 ST52.3
ASTM A519	SAE1020 SAE1045 SAE1026
GB/T	20# 45# 16Mn Q345B Q345D Q345E 42CrMo 27SiMn

 

Application: hydraulic cylinder, pneumatic cylinder,Jack, cylinder barrel,and and all pipes have requirement for tolerance.

Manufacture Method: hot rolled and then cold drawn.

Heat Treating Method/Delivery Condition:

BK	BKS	GBK	NBK	Q+T
+C	+SR	+A	+N	Q+T
Cold drawn	Stress relieved	Annealed	Normalized	QUENCHED + TEMPERED

 

 Parameters:

Manufacture method	Cylinder ID (mm)	Length (m)	Straightness (mm/m)	Tolerance on ID	Roughness (μm)
Cold drawn	40-420	≤16M	0.2-0.5	Depends on  requirement	0.8-1.6
cold drawn- honed	40-420	12M	0.2-0.3	H8-H9	0.2-0.8
Cold drawn-skived & burnished	40-420	9M	0.2-0.3	H8-H9	≤0.4

 

Mechanical property:

Final Supply Condition	Cold finished (Hard)(BK)		Cold drawn and stress-relieved                       (BK+S or + SR)			Hardness HB
Parameters	T.S obN/mm^2	Elongation δ5%	T.S obN/mm^2	Y.S OsN/mm^2	Elongation δ5%
20# (A106B, ST45, E255)	>=550	>=8	>=520	>=375	>=12	175
45#(CK45)	>=650	>=5	>=600	>=500	>=10	190
Q345B(ST52, E355)	>=640	>=5	>=600	>=520	>=15	190
25Mn	>=640	>=5	>=600	>=510	>=15	195
27SiMn	>=840	>=5	>=760	>=610	>=10	220

Chemical Properties:

Material	C%	Mn%	Si%	S%	P%
20#	0.17-0.23	0.35-0.65	0.17-0.37	≤0.035	≤0.035
ST45	≤0.21	≥0.4	≤0.35	≤0.025	≤0.025
E255	≤0.21	0.4-1.1	≤0.35	≤0.025	≤0.025
45#	0.42-0.50	0.50-0.80	0.17-0.37	≤0.035	≤0.035
Q345B	≤0.20	≤1.70	≤0.50	≤0.035	≤0.035
E355	≤0.22	≤1.6	≤0.55	≤0.025	≤0.025
ST52	≤0.22	≤1.6	≤0.55	≤0.04	≤0.04
25Mn	0.22-0.29	0.70-1.0	0.17-0.37	≤0.035	≤0.035
27SiMn	0.24-0.32	1.10-1.40	1.10-1.40	≤0.035	≤0.035

Part of size list (ID*OD)

40*50		100*127		240*273
40*55		110*130		250*266
50*60		120*140		250*280
50*63		120*145		250*300
60*70		125*140		280*323
60*73		125*145		280*325
63*73		140*165		300*320
63*76		140*168		300*356
70*80		150*180		320*340
70*82		160*184		320*356
70*85		160*194		320*370
80*90		170*200		350*370
80*92		180*210		400*420
80*95		200*216
80*100		200*220
90*102		200*232
90*105		200*245
100*114		220*250
100*121		220*273