Hot Sale Stkm 13A Stkm 13c Stkm 13 Cold drawn Tubo de descarga

• Serviço pós-venda: suporte
• Garantia: 1 ano
• Digitar: Sem Costura
• Técnica: Laminação a Quente
• Material: Aço Carbono
• Tratamento da superfície: Preto
• N ° de Modelo.: a106 a53 a179 a178 a192 a199 a335 a333 p5 p9 p11
• seção Forma: Redondo
• modelo não: astm a106 gr. b/api5l sch10/sch40/sch80/sch160
• normas: astm/asme/din/en
• fim: extremidade cónica (> 2"), simples ( ≤ 2"), com tampa de plástico
• tempo de entrega: enviado em 15-20 dias após o pagamento
• amostra: amostra disponível gratuitamente
• termos de envio: comando/cfr/cif
• comprimento: 5,8m 6m fixo, 12m fixo, 2-12 m aleatório.
• Pacote de Transporte: Bundle with Steel Strips
• Especificação: OD: 10mm-910mm; THK: 1.0-56mm
• Marca Registrada: boer king
• Origem: China
• Código HS: 730419
• Capacidade de Produção: 2000 Tons/Month

Descrição de Produto

Product information:
 

Standard:	seamless steel tubes as per standard ASTM/ASME/DIN/JIS/GOST	Elongation:	≥16%
Shape:	round&customized	Test temperature:	/
OD:	75mm	I.D Tolerance:	H8
ID:	63mm	Length:	4.5m
WT:	6mm	ID roughness:	Ra≤0.1mm
Type:	cold-rolled; inside hole honing(SRB)	Technology:	SRB&Honed
Yield strength:	≥580	Scope:Honed tube for hydraulic cylinder, swivel crane, injection machine for construction machine application
Tensile Strength:	≥ 620

Process-cycle:
Billet-------Inspection/Shearing-------Pickling--------Surface trastment--------Cold Rolling-------Heat treatment-------Cutting-------Straightening-------Inspection-------Length measuring, Weithting, Coating, Marking Bundling
 
1. Description: Honing is a kind of machining technology. Through honing head, the inner hole of cold drawn pipe is processed by reciprocating high-speed grinding technology, so that the inner hole can meet the requirements of tolerance size and surface roughness that we need.
Honed tube is a kind of smooth bore steel tube used to manufacture hydraulic cylinder barrels that is the core part of a piece of hydraulic cylinder. 
2. Commodity: 42CrMo4 Precision Cold Drawn Honed Pipe
3. Size range: Inside diameter: 25mm -500mm; Wall thickness: 2-50mm
4. Available steel grade: 

SAE/AISI:	SAE1020, SAE1026, SAE1045, SAE4130, SAE4140
DIN:	ST52, ST52.3, ST52.4
EN:	E355, C45E, 25CrMo4, 42CrMo4, CK45, S45C, E410, E470
GB:	20#, 45#, 16Mn, Q345B, Q345C, Q345D, Q345E, 25Mn, 27SiMn,

5. Manufacture method: Cold rolled, hydraulic cold drawn, hot rolled+deep hole boring
6. Delivery condition: 

BK	BKW	BKS	GBK	NBK	Q+T
+C	+LC	+SR	+A	+N
Cold rolled	Cold drawn	Stress relieved	Annealed	Normalized	Quenched+Tempered

7. Bore treatment: Honing, skiving&roller burnishing
8. Bore roughness control: Ra0.25um max or Ra0, 35um max for honed tubes, Ra0.25um max for skived&roller burnished tubes. 
9. End finish: Plain ends with square cuts, free of burrs for honed tubes. Little bevelled ends for skived&roller burnished tubes. 
10. Standard export packing: In bundles tied with steel strips. Internal & external oil coating. Plastic caps on both ends. External packing by PVC bags and knit bags. 
11. Customized packing and marking can be provided upon request. 
12. H8 tolerance: 

ID range	Tolerance	ID range	Tolerance
18< d ≤30	+0/+0.033	180< d ≤250	+0/+0.072
30< d ≤50	+0/+0.039	250< d ≤300	+0/+0.081
50< d ≤80	+0/+0.046	300< d ≤315	+0/+0.081
80< d ≤120	+0/+0.054	315< d ≤400	+0/+0.089
120< d ≤180	+0/+0.063	400< d ≤500	+0/+0.097

13. Difference between honed tube and skived & roller burnished tube: In hydraulic cylinder industry, there are 2 solutions for bore treatment: Honing, and skiving&roller burnishing. Honing or skiving&roller burnishing leads to different internal surface image, but both ensure good roughness. 
 

Chemical composition(%) of precision pipe's commin grade

Standard	Grade	C	Si	Mn	s	p	Cr
GB/T 699 GB/T 3639 GB3077 GB/T1591 GB/T 8163-2018	10#	0.07~0.13	0.17~0.37	0.35~0.65	≤0.035	≤0.035	\
	20#	0.17~0.23	0.17~0.37	0.35~0.65	≤0.035	≤0.035	\
	35#	0.32~0.39	0.17~0.37	0.35~0.65	≤0.035	≤0.035	\
	45#	0.42~0.50	0.17~0.37	0.50~0.80	≤0.035	≤0.035	\
	40Cr	0.37~0.44	0.17~0.37	0.50~0.80	≤0.035	≤0.035	0.08~1.10
	25Mn	0.22~0.29	0.17~0.37	0.70~1.00	≤0.035	≤0.035	≤0.25
	Q345B	≤0.20	≤o.50	≤1.7	≤0.035	≤0.035	≤0.3
	37Mn5	0.30~0.39	0.15~0.30	1.20~1.50	≤0.015	≤0.020	\

Conventional mechanical properties of precision pipe

Standard	Grade	Delivery Conditions
		BK(hard)		BKW(soft)
		Tensil Stength(Mpa)	Make percentage elongation(%)	Tensile stength(Mpa)	Make percentage elongation(%)
GB/T 3639 GB 3077	20#	≥550	≥10	≥490	≥15
	25Mn	≥600	≥12	≥540	≥15
	Q345B	≥620	≥12	≥550	≥15
	45#	≥645	≥8	≥625	≥15
	40Cr	≥784	≥14	\	\
	37Mn5	≥784	≥14	\	\

Dimensional tolerances of inner diameter
 

Standard	Inner Diameter(mm)	Inner Diameter Deviation(mm)
GB1801-79		H7	H8	H9	H10
	30	0~+21	0~+33	0~+52	0~+84
	30-50	0~+25	0~+39	0~+62	0~+100
	50-80	0~+30	0~+46	0~+74	0~+120
	80-120	0~+35	0~+54	0~+87	0~+140
	120-180	0~+40	0~+63	0~+100	0~+160
	180-250	0~+46	0~+72	0~+115	0~+185
	250-315	0~+52	0~+81	0~+170	0~+210
	315-400	0~+57	0~+89	0~+140	0~+230

 

Product showcase:

Packing details:

1.Black varnish painted or oil painted anti-corrosion oil ,2PE, 3PE on the surface

2.Plain,squire cut or bevelled end by caps

3.In hexagon or triangle bundle with steel strips

4. Marking: As per customer's requirment

Shipping details:

Trade Terms:FOB/CIF/CFR

 Payment Terms:L/C,T/T, Western Union.

 Loading Port:XinGang TianJin, China

 Delivery: Within 15-20days after we receive deposit or L/C at sight



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