High strength cylinder pipe

High strength cylinder pipe has high strength & tenacity, brittle fracture resistance and good weldability. S700 and S890 high strength cylinder pipes also have good hardenability and uniform performance after heat treatment. They are especially suitable for manufacturing high strength cylinders with large OD, medium & large wall thickness.

Application Fields

High strength cylinder pipe are mainly used for hydraulic support of coal collection face, hydraulic cylinder, engineering machinery, ship lock and offshore platform etc.

Production Range

• OD: 42mm-760mm
• WT: 4mm-120mm

Standard and Steel Grade

• GB/T 8162
• GB/T 8163
• GB/T 17396 or technical agreement.

Requirements for Mechanical Properties
Steel Grade	Delivery Condition	Tensile	Yield	Elongation	R.A.	Absorbed-engergy
		(MPa)	(MPa)	(%)	(%)	(J)
		Not Less Than
27SiMn	Quenching+Tempering	980	835	12	40	20℃(AKU2)	39
30CrMnSiA	Quenching+Tempering	1080	835	10	35	20℃(AKU2)	39
30CrMoA	Quenching+Tempering	930	735	12	50	20℃(AKU2)	71
20MnTiB	Quenching+Tempering	1050	930	10	45	20℃(AKU2)	50
S700	Quenching+Tempering	750	650	14	40	-20℃(AKV2)	47
S890	Quenching+Tempering	810	700	14	35	-40℃(AKV2)	60

Seamless pipe is used for supply or transportation of water, oil, gas and other liquids under the specification of seamless pipe (GB / T8163-1999).

Mechanical Properties(%) of GB/T8163 steel pipe

Standard codes	Models of steel tubes	Tensite strength（MPa）	Yield strength（MPa）	Elongation（％）
GB/T8163	10	335-475	≥205	≥24
	20	410-550	≥245	≥20
	Q345	490-665	≥325	≥21

Chemical Composition(%) of GB/T8163 steel pipe

Standard codes	Models of steel tubes	Chemical compositions（％）
		C	Si	Mn	P	S	Cr	Ni	Cu
GB/T8163	10	0.07-0.14	0.17-0.37	0.35-0.65	≤0.035	≤0.035	≤0.15	≤0.25	≤0.25
	20	0.17-0.24	0.17-0.37	0.35-0.65	≤0.035	≤0.035	≤0.25	≤0.25	≤0.25
	Q345	0.12-0.20	0.20-0.55	1.20-1.60	≤0.045	≤0.045	/	/	/

 

Sunny Steel provide a wide range of steel products as Steel pipes, Seamless tube and seamless pipes, Alloy pipes, Pipe fittings, Composite steel pipe used in the industry, construction etc.

Our customers are able to rely on us for deliveries timed to meet the exacting requirements of their projects as well as for regular deliveries of stock.

We enjoy close working relationships with our customers working with them from concept through to completion often resulting in economy of design and the cost benefits that go with it. 

By choosing Sunny Steel as your supplier, you can focus on what matters most to you instead of getting bogged down in the details.

We are guided and motivated by the following 3 core values.

Professional

Our team are highly trained and experienced in servicing and producing all types of steel supplies. Sunny Steel prides itself on the professional relationship we develop with all clients.

Reliable

We are reliable because we know the market, we are honest, truthful and we will meet our promise to our clients. We provide our clients with the best value products in an effort to grow their reputation within their industry.

Efficient

We are committed to deliver a total solution of steel pipes, fittings, flanges logistics and technical services to fulfill our client’s requirements in the most efficient and cost effective manner.