JIS G3445 Stkm13b Seamless Carbon Steel Auto Tube

• After-sales Service: Change/Return
• Warranty: 10 Year
• Type: Seamless
• Technique: Cold Drawn
• Material: Carbon Steel
• Surface Treatment: Black
• Usage: Machinery Industry
• Section Shape: Round
• Od: 40-400mm
• Wt: 4-40mm
• Material-1: Carbon Steel Like SAE1020, SAE1045, C45e
• Material-2: Low Alloy Steel Like SAE1026, St52, E355
• Material-3: Alloy Steel Like 25crmo4, 42CrMo4, SAE 4130
• Quality Standard: DIN 2391, En 10305, ASTM A519
• Loading Port: China Main Port
• Product Name: Hydraulic Cylinder Tube
• Transport Package: Standard Export Seaworthy Packing
• Trademark: KM
• Origin: China
• HS Code: 730431
• Production Capacity: 1500 Ton/Month

Product Description

JIS G3445 Stkm13b Seamless Carbon Steel Auto Tube 

Production Introduction
This is Japanese industrial standard applicable to carbon steel tubes for machine structural purposes . Its carbon content less than 0.8%. The steel contains less sulfur, phosphorus and non-metallic inclusions than carbon structural steel, and has excellent mechanical properties.
Precision pipe is the carbon, alloy or stainless steel pipe with high precision sizes. Usually it has been made through hot rolling or cold drawn (cold rolling) processes. So precision pipe is a kind of seamless pipe.
It is designed with several advantages:
Inside and outside surface no oxide coating;
It could bear high pressure, no leaking;
Strict less tolerance;
Surface smooth;
No reformation in cold bending, no cracks during flaring test, and flattening test.
With these advantages it is widely used for manufacturing the pneumatic parts and hydraulic components.
Application
machinery, automobiles, bicycles, furniture, appliances and other machine parts.
Size: 6mm-340mm.O.D
W.T.: 1mm-50mm.
Shape: Round.
Production type: Cold drawn, cold rolled or hot rolled.
Length: Single random length/ Double random length or as customer's actual request max length is 10m.
Marking: Logo+standard+dimension+heat no
Packing: in wooden case/woven bag/custom
Quality guarantee: 100% UT passed
Mill's test certificate: EN10204 3.1
Grade and Designation
The grade and designation of the tube shall be as given as follows table.
The sub classification letter symbols A, B and C are used to indicate distinction of method of manufacturing the tube, cold working process, heat treatment, etc.

Grade		Designation
Grade 11	A	STKM 11A
Grade 12	A	STKM 12A
	B	STKM 12B
	C	STKM 12C
Grade 13	A	STKM 13A
	B	STKM 13B
	C	STKM 13C
Grade 14	A	STKM 14A
	B	STKM 14B
	C	STKM 14C
Grade 15	A	STKM 15A
	C	STKM 15C
Grade 16	A	STKM 16A
	C	STKM 16C
Grade 17	A	STKM 17A
	C	STKM 17C
Grade 18	A	STKM 18A
	B	STKM 18B
	C	STKM 18C
Grade 19	A	STKM 19A
	C	STKM 19C
Grade 20	A	STKM 20A

Delivery Condition 
1. BK (+C) : No heat treatment after last cold forming process.
2. BKW (+LC) : After last heat treatment there is a light finishing pass (cold drawing)
3. BKS (+SR): After the final cold forming process the tubes are stress relieve annealed.
4. GBK (+A): After the final cold forming process the tubes are annealed in a controlled atmosphere.
5. NBK (+N):After the final cold forming process the tubes are annealed above the upper transformation point in a controlled atmosphere.

Company Profile
From 1989 to now, Kingmetal Steel focus on manufacturing and distributing pipeline products including piping, fitting, flange, valve and fastener in stainless, carbon, alloy and duplex steel.
Kingmetal has a factory to manufacture seamless stainless steel pipe from DN6 to DN600 and distribute seamless steel pipe and fitting from top brand manufacturers such as Baosteel, Hengsteel, Tiansteel and Pansteel etc.
All of products are strictly compliance with standard, 100% inspection passed including visual, dimension and PMI test before shipment.
Both our sales and logistic teams are over 10 years of experiences and training frequently.
After- sales service with high efficiency, if any products are short quantity/weight or damaged caused by manufacturing, design or transportation can be compensated.
Why choose us?
One-Stop Solution
We have thousands of total production experience, from raw materials to finished products.
Competitive Price
Large scale purchase, standardized production process and efficient management make our price competitive.
Quick Shipping
Years of export experience enable us to control the transportation time more accurately.
Quality Control
The standardized production process, comprehensive management system, professional testing equipment
Special material customization
We support the customization of various complex materials
OEM/ODM
We support any form of OEM/ODM customization requirements.