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4340 Alloy Steel Tubes for Mechanical Purpose/ Hollow Bar

FOB Price

USD $650 - $850 / Ton

2 Tons(Min.Order)

Supply Ability 1000 Ton / Tons per Month
Port Shanghai
Payment Terms:T/T

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Product Details

Thickness:	2, 100	Section Shape:	Round	Outer Diameter:	40 - 810 mm
Place of Origin:	Jiangsu, China	Secondary Or Not:	Non-secondary	Application:	Other, Mechanical Tubing
Technique:	Hot Rolled	Certification:	Other	Surface Treatment:	Other
Alloy Or Not:	Is Alloy

Product Description

Application:

•Hydraulic Cylinders: Motocranes, Tractors and Trucks
•Bearings: Car Components
•Mining Equipment: Powered Roof Supports, Hydraulic Pit Props
•Cranes and Agricultural Engineering: Tour Cranes, Tractors and Harvesters
•Rollers: Conveyor Rollers, Tubes for Textile, Paper, and Printing industries, Steel Plant Rollers
•Downhole Equipment: Submerged Pumps

Detailed Images

Steel Grades:

ASTM A519: 4340

Competitive Advantage:

High strength
High tenacity
Good hardenability
High resistance to thermal properties.
Competitive price
Fast production leadtime

Sizes Range:

OD:40mm-810mm, WT:2mm-100mm

Chemical Composition(%):

Grades	C	Si	Mn	P	S	Cr	Ni	Mo	Cu
4340	0.38-0.43	0.15-0.35	0.60-0.80	0.040 max	0.040 max	0.70-0.90	1.65-2.00	0.20-0.30	0.30 max

Outer Diameter Tolerances

+/-1%, or +/-0.5mm (Chose the bigger one)

Wall Thickness Tolerances

Scope of Outer Diameter	Ratio of Wall Thickness and Outer Diameter (WT/OD)	Tolerance
102mm max	/	+/12.5% or +/-0.4mm (Chose the bigger one)
102mm min	0.05 max	+/15% or +/-0.4mm (Chose the bigger one)
102mm min	0.05-0.10	+/12.5% or +/-0.4mm (Chose the bigger one)
102mm min	0.10 min	(-10%, +12.5%)

Delivery Conditions

Hot Rolled only
Stress Relieved
Annealed
Normalized
Quenched and Tempered

Surfaces Conditions

Black surface with oxygen skin
Grinded for external or internal surface, or external and internal surface
Peeled for external or internal surface, or external and internal surface

Mechanical Properties (Quenched and Tempered) (T=20°C if not differently stated)

Wall Thickness (mm)	Tensile Strength (Mpa)	Yield Strength(Mpa)	Elongation (Longitudinal) (%)	Elongation (Transverse) (%)	Notch impact energy (Longitudinal) [J]	Notch impact energy (Transverse) [J]
8 max	1100 max	900 min	10 min	8 min	35 min	/
8-20	1000 max	800 min	11 min	9 min	40 min	25 min
20-50	900 max	700 min	12 min	10 min	45 min	27 min
50-80	800 max	600 min	13 min	11 min	45 min	27 min

Recommended Heat Treatment Temperatures

Heat Treatment	Temperatures (°C)
Annealing	650-700
Normalizing	850-880
Austenitizing	820-850

Tube ends:

The hollow bar comes with square cut and deburred ends.

Certification:

The hollow bar is supplied with 3.1.B inspection certificate,according to the standards EN 10204 and ISO 10474.

Identification and Marking:

The hollow bar is marked in indelible ink, the details being repeated along the entire length of each tube and on a label, as follows:
Manufacturer’s trademark – manufacturing standard – dimensions -steel grade – supply condition – cast no. – item number.

Packaging:

The hollow bar comes in strapped bundles. The minimum weight of each bundle is 2000kg; the maximum bundle weight being 5000kg, with a minimum of 4 pieces

Product Pictures

Contact Us

Hunan Fushun Metal Co., Ltd.: Contact nameFlorence Tang; Phone86-731-89903933; AddressRoom 1506, Building 37, Zhongcheng Lijinxiangshan District, No. 239, Part II, Wanjiali Middle Road Changsha,Hunan

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