DIN 2391 Hydraulic Cylinder Tube ST52 heavy wall mechanical tubing

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St52 steel
Steel Category:Steel for Boilers and Pressure Vessels ,Hydraulic Cylinder
Steel standard:DIN 17135 & DIN 2391
Steel grade:DIN 17135 St52
Dimension: Thickness 5-300mm, Width 1500-3500mm, Length 3000-12000mm
Application:St52 steel grade is one of grade in DIN 17135 , which is non alloy and alloy steels with specified elevated temperature properties. A St 52 grades are used above all for manufacturing boilers, pressure vessels and pipes transporting hot liquids.
Supplementary Technology: HIC Test | NACE MR0175 | Z15 | Z25 | Z35 | S1 | S2 | S3 | S4.1
S5 | S6 | S7 | S8 | S9| S11 | S12 | S14 | S17

St52 steel chemical composition:

St52 Chemical Composition
Grade	The Element Max (%)
Grade	C	Si	Mn	P	S	Al(min)	N
St52	0.20	0.50	0.9-1.70	0.03	0.025		0.02
	Cr	Cu	Mo	Nb	Ni	Ti	V
	0.30	0.30	0.08	0.005	0.50	0.03	0.10

St 52 steel mechanical property:

Grade		St52 Mechanical Property
Grade	Thickness	Yield	Tensilmie	Elongation	Impact Energy(KV J) min
St52	mm	Min Mpa	Mpa	Min %	-20°	0°	+20°
	≤ 16	355	490-630	22	40	47	55
	16> to ≤35	355	490-630	22	40	47	55
	35> to ≤50	345	490-630	22	40	47	55
	50> to ≤70	325	490-630	22	40	47	55
	70> to ≤100	315	470-610	21	40	47	55
	100> to ≤150	295	450-590	21	40	47	55

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LCKC STEEL, produces all kinds of seamless pipes with OD from 13.7mm~1220mm. The technology can be hot rolled, cold rolled and cold drawn.

End finish: plain ends with square cuts, free of burrs, bevelled ends.

For bigger size with ID above 300mm, hot rolled+deep hole boring+honing or skiving&roller burnishing will be used.

Manufacture method: Hydraulic cold drawn, deep hole bored+externally machined.

Delivery condition:

+AR	BKS	GBK	NBK	Q+T
As rolled	Stress relieved	Annealed	Normalized	Quenched+tempered
Hot rolled	+SR	+A	+N	Q+T

Internal surface treatment: honing, skiving&roller burnishing

ID tolerance: H7, H8, or as per request.

OD tolerance: as per DIN2391-2 or EN10305-1

W.T tolerance: +/-7.5%

Roughness of internal suface: Ra0.25um Max

Test:Chemical Component Analysis, Mechanical Properties, Technical Properties, Exterior Size Inspection, hydraulic testing , X-ray Test.

Jay Hou

LIAOCHENG KUNCHENG PIPE CO.,LTD

Room A2709 ChuangYe Building,Liaocheng City, Shandong Province, China

Mobile&Whatsapp:+8613184174934(Wechat)

Tel&Fax:0086-0635-2930669

Skype:mrhrc

PRODUCTS MENU:

Honed Tube : JIS STKM13C, DIN ST52, SAE1020 ,DIN CK45 etc.
Alloy Seamless Tube: ASME SA-335 (P5, P9, P11, P22 P91) A213 -T22/T12 etc.
Hollow seamless bar :AISI 4130 ,ASTM 4140 etc.
Carbon steel pipe :ASTM A106 Gr.B
Stainless steel pipe : 304, 316, 316L & H grades etc.
Hollow section :S235JR, S275JR, S355JR, P265GH, P355N

SERVICES MENU:

Machining:Turning , Threading , Milling , Boring , Grooving , Skiving , Trepanning , Sawing , Straightening , honing etc

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