wide application 30CrMo seamless mechanical tube

Brand:aa

Product detail:

wide application 30CrMo seamless mechanical tube 

 

The structure of Jiangsu Dehai Group:

Zhangjiagang Huagang Industrial Co., Ltd.——Tube manufacturer

Zhangjiagang Huadian Power Equipment Co., Ltd.——Boiler parts manufacturer

Zhangjiagang Huadian Import & Export Co., Ltd.——Trading company for tubes and boiler parts

 

The strength products of Zhangjiagang Huagang Industrial Co., Ltd. are in the table below:

Standards	Description	Common Steel grades
ASTM A179	Seamless cold-drawn low-carbon steel heat-exchanger and condenser tubes	A179
ASTM A192	Seamless carbon steel boiler tubes for high-pressure services	A192
ASTM A210	Seamless medium-carbon steel boiler and superheater tubes	Grade A-1, Grade C
ASTM A519	Seamless carbon and alloy steel mechanical tubing	MT1010,MT1015,MT1020, 1008, 1010, 1020, 1035, 1045, 4130, 4140
EN10305-1	Seamless cold drawn tubes	E215, E235, E355
EN10305-4	Seamless cold drawn tubes for hydraulic and pneumatic power systems	E215, E235, E355
DIN 2391	Seamless precision steel tubes	St35, st45, st52, st37.4
DIN 17175	Seamless tubes of heat-resistant steels	St35.8, 15Mo3
GB/T 3639	Seamless cold-drawn or cold-rolled steel tubes for precision application	10#, 20#, 45#, Q345B
GB/T 8163	Seamless steel tubes for liquid services	10#, 20#, Q345B, 16Mn
GB 9948	Seamless steel tubes for petroleum cracking	10#, 20#
GB 3087	Seamless steel tubes for low and medium pressure boiler	10#, 20#

 

Seamless precision steel tubes are used variously:
• equipment engineering     

• elevator tubes
• gas cylinders
• pit props
• hydraulic lines
• chain pipes
• bicycle/ motorcycle frames
• rivets
• pumps
• technical machinery
• cylinder, piston and telescopic tubes
• stabiliser tubes
• gear box tubes
• drive shaft tubes  

 

Tubes for automotive industry:
• axles for gearboxes
• fuel injection lines
• piston bolts
• ball cages
• steering wheel shafts column tubes
• power-assisted steering tubes     

  

Chemical requirements of Grade 4130, equals to 30CrMo in Chinese standards :   

Carbon, %                                           0.28-0.33 

Manganese, %                                    0.40-0.60  

Phosphorus, max,  %                         0.040  

Sulfur, max,  %                                   0.040  

Silicon, %                                           0.15-0.35

Chromium, %                                     0.80-1.10  

Molybdenum, %                                0.15-0.25  

 

Mechanical Properties 

Grade Designation	Condition	Ultimate Strength, MPa	Yield Strength, MPa	Elogation in 2 in. or 50 mm, %
4130	SR	855	689	10
	A	552	414	25
	N	855	621	20

 

Your accurate descriptions in inquiry will help us give you what you need to make your search successful.      

 

Designation	Symbol	Description
Cold finished (hard)	BK	Tubes do not undergo heat treatment following the final cold forming and, thus, have a rather high resistance to deformation.
Cold finished (soft)	BKW	The final heat treatment is followed by cold drawing involving limited deformation. Appropriate further processing allows a certain degree of cold forming. (e.g. bending, expanding).
Cold finished and stress-relieved	BKS	Heat treatment is applied following the last cold forming process. Subject to appropriate processing conditions, the increase in the residual stresses involved enables both forming and machining to a certain degree.
Annealed	GBK	The last cold forming process is followed by annealing in a controlled atmosphere.
Normalized	NBK	The last cold forming process is followed by annealing above the upper transformation point in a controlled atmosphere.

Production Standard	Application
DIN2391	Seamless Precision Steel Tubes for mechanical and automotive engineering.
EN10305-1	Seamless Steel Tubes for precision applications
DIN17175	Seamless Tubes of Heat resistant Steels used in Boilers, Pressure vessels & equipment for service upto 600° C and at high pressures.
ASTM A179/SA179	Seamless Cold-Drawn Low-Carbon Steel tubes  for Heat-Exchanger and Condenser.
ASTM A192/SA192	Seamless Carbon Steel Boiler Tubes for High-Pressure Service.
ASTM A210/SA210	Seamless Medium-Carbon Steel Tubes for Boiler and Super heater.

Tests we apply to the tubes:

1) Chemical Composition Analysis

2) Mechanical Properties (Tensile strength, Yield strength,, Elongation, Hardness)

3) Technological Test (Flattening test, Flaring Test, Bending Test, Hydraulic pressure test)

4) Surface quality detection

5) Eddy-current examination

6) Visual test

 

• Mill test certificates will be issued according to EN10204/3.1B
• Packing: Bare packing/bundle packing/crate packing/wooden protection at the both sides of tubes and suitably protected for sea-worthly delivery or as requested.
• Inspection and Test: Chemical Composition Inspection, Mechanical Properties Test(Tensile Strength,Yield Strength, Elongation, Flaring, Flattening, Bending, Hardness, Impact Test), Surface and Dimension Test, No-destructive Test, Hydrostatic Test.
• Surface treatment: Oiled, black painted, hot dipped galvanized or phosphate coating as required.
• Both ends of each crate will indicate the order no., heat no., dimensions, weight and bundles or as requested.