Seamless ID Bore Honing Tube for Air Cylinder 250*266

• Material: St52 Ck45 C20 A106
• Process: Cold Drawn
• Temperature Classification: Medium Temperature Piping
• Model NO.: 250*266
• MPa Classfication: Medium Pressure Piping
• Standard: GB, DIN
• Cross-Section Shape: Round
• Connection Type: Seamless
• Diameter: 250*266
• Medium: Seamless
• Transport Package: in Bundel, with Plastics on Both Ends, Oil Coated
• Specification: ID40-500
• Trademark: BAIHENG
• Origin: China
• HS Code: 7304900000
• Production Capacity: 1000 Ton Per Month

Product Description

Name : honed tubes, honing pipe, hydraulic cylinder tubes, pneumatic cylinder tubes, honed pipe, honing tube, seamless honed steel tube, precision tubes, cold drawn honed tubes, skived tubes, skived and roller burnished tubes, skived pipes, SRB tube, SRB pipe, hydraulic SRB tube, hydraulic cylinder skived tubes. We also produce chrome plated piston rod, chrome bar, chrome shaft, chrome plated tube, hollow piston rod
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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

Manufacture Method: cold drawn, cold rolled, Hot rolled+Deep Hole Boring

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

 

Hydraulic & pneumatic tube size and parameters:

 

Manufacture method	Cylinder ID (mm)	Length (m)	Straightness (mm/m)	Tolerance on ID	Tolerance on WT	Roughness (μm)
Cold drawn	40-420	≤16M	0.2-0.5	Depends on requirement	±8%	0.8-1.6
Cold rolled	30-100	≥14M	0.2-0.5	Depends on requirement	±5%	0.8-1.2
cold drawn- honed	40-420	14M	0.2-0.3	H8-H9	±8%	0.2-0.8
Cold drawn-skived & burnished	40-300	9M	0.2-0.3	H8-H9	±8%	≤0.4
Deep hole boring- honed	50-1000	12M	0.2-0.3	H8-H9	±8%	≤0.8
Deep hole boring- skived	50-300	9M	0.2-0.3	H8-H9	±8%	≤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	>=720	>=600	>=10	210

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

 

Tolerance on ID:

ID	Tolerance for ID (μm)
	H7	H8	H9	H10
30	+21 0	+33 0	+52 0	+84 0
>30-50	+25 0	+39 0	+62 0	+100 0
>50-80	+30 0	+46 0	+74 0	+120 0
>80-120	+ 35 0	+ 54 0	+87 0	+140 0
>120-180	+40 0	+63 0	+100 0	+160 0
>180-250	+46 0	+72 0	+115 0	+185 0
>250-315	+52 0	+81 0	+140 0	+210 0
>315-400	+57 0	+89 0	+170 0	+230 0

 

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