DIN 55si7 Spring Steel Round Bar

• Type: Alloy Steel Bar
• Standard: AISI, ASTM, JIS, DIN, BS
• Technique: Hot Rolled
• Application: Structural Steel Bar
• Surface Treatment: Black,Grinded,Milled,Turned
• Alloy: Alloy
• Model NO.: 55Si7
• Special Use: Free Cutting Steel
• Product Name: 55si7 Spring Steel Round Bar
• GB: 55si2mn
• Delivery Condition: Hot Rolled, Forged, Eaf+Lf+Vd
• Delivery Term: Fob, CIF, CFR, Exwork, etc
• Shipping: by Sea, Air
• Hot Rolled Round Bar: Dia5-3000mm
• Payment Term: T/T, L/C
• Length: 2000-6000mm
• SAE: 9260
• Hardness: 321 Hbs
• Transport Package: Seaworthy Packing
• Specification: Dia. 5-3000mm, length: 2000-6000mm
• Trademark: BOZHONG or customized
• Origin: China
• Production Capacity: 5000 Tons/Month

Product Description

DIN 55Si7 spring steel

Spring steel DIN 17222 55Si7 main features and application

Spring steel DIN 17222 55Si7 is a kind of pre-hardened material well suited for fabrication requiring shaping by blanking, bending, drawing, extrusion and swaging. Spring steel DIN 17222 55Si7 allows for closer dimensional tolerances and improved finish and available in several grades. Grade selection is important when considering higher levels of wear resistance.
DIN 17222 55Si7 spring steel has higher strength and elastic limit and higher relaxation ability,good temper resistance.mainly used for the production of  spiral spring, butterfly spring, air seal spring,which work under less than 250 degrees, high pressure, deformation load conditions.

 DIN 17222 55Si7 spring steel equivalent

TOCT 14959	DIN 17222	GB/T 1222	NF A35-571
55C2T	55Si7	55Si2Mn	55SC7

DIN 17222 55Si7 chemical composition data:(% in mass)

C	Si	Mn	Cr	p	S	Ni	Cu
0.52-0.60	1.50-2.00	0.60-0.90	≤0.35	≤0.035	≤0.035	≤0.35	≤0.25

DIN 17222 55Si7 spring steel mechanical property and delivery condition.

Product Type	Delivery Condition	Mechanical property					Delivery Hardness HB
		Rm Mpa	Rel Mpa	A11 %	Z %	Sample
Hot rolled round bar/square bar	Hot rolled	≥ 1270	≥ 1180	≥ 6	≥ 30	Q+T	Hot rolled 302 Cold drawing+hot processing 321
Forged round bar/square bar	Hot rolled
Hot rolled strips	Hot rolled
Cold drawing round bar	Hot processing	1270	1180	6	30	-	-
Hot rolled thin plate	Hot rolled	950	-	12	-	-	-
T=tempering;Q=quenching;QT=globurizing;Y=chilling

Bozhong Group can offer you best quality DIN 17222 55Si7 steel plates,spring steel strips,DIN 17222 55Si7 spring steel coils,DIN 17222 55Si7 spring steel flat bar,DIN 17222 55Si7 spring steel rod coil,DIN 17222 55Si7 hot rolled steel thin plates,DIN 17222 55Si7 cold rolled spring steel belt,cold rolled spring steel strip,hot rolled round spring steel bar,hot rolled square spring steel bar,cold drawing spring steel,if you want to find Chinese spring steel supplier and manufacturer, you are welcomed to Bozhong.

 
 Quality Assurance

Below inspection will be done in the production.
(1) ray detection---RT;
(2) ultrasonic testing---UT;
(3) Magnetic Particle Testing-MT;
(4) penetration testing-PT; 
(5) eddy current flaw detection-ET

Company information:

Bozhong Group Mainly supply in forms of coil, sheet, plate, rod, bar, tube, pipe, beam, angle, flange, wire, strip, channel, etc., with various varieties, wide range of dimensions, high purity, stable chemical composition, high dimensional accuracy and excellent surface quality. The products are mainly used in the fields of industries such as automobile engineering, railway transportation, aviation, aerospace, machinery, petrochemical, energy, environmental protection, offshore, chemical, oil & gas, military, power plant, nuclear power, pressure vessel, boiler equipment, mold manufacture, etc.
 
steel coil
steel plate
steel sheet
steel bar/rod
    steel round bar
    steel flat bar
    steel square bar
steel pipe/tube ( welded or seamless )
    steel round pipes 
    steel square pipes
    steel welded tubes
    steel seamless tubes
steel strip
steel beam
steel angle
steel channel
steel flange
Steel wire
 
 
Bozhong Group can supply a variety of structural steel, high-strength steel, wear-resistant steel plate, boiler and pressure vessel steel, marine engineering and stainless steel plate in the thick steel and various European standard bars and pipes and profiles.Our global sales and service network throughout all around the world to ensure that the goods reach the customer in the shortest time.
 
We can follow your drawings and requirements, to provide you with oxygen cutting, plasma cutting and laser cutting and other processing services. You can also perform ultrasonic testing in accordance with EN10160 standard, EN10164 standard test Z15, Z25, Z35, weld bending detection, PWHT detection,etc.
 
We have ISO9001: 2000 quality management system certification, and obtain the quality certification from all the well-known certification company, including TuV / LRS / GL / CE and so on.
 
Special steel includes as below:
Boiler and pressure vessel steel
Pipeline steel
Bridge steel
Nuclear power steel
Structural steel
Die steel
High strength steel
Abrasion resistant steel
Weathering, corrosion resistant and fire resistant steel
High rise building steel
Shipbuilding and offshore engineering steel
 
FAQ: 
Q: Are you a manufacturer or merely a trader?
A: We are group of companies and owned manufacturer bases and trading company. We specialized in special steel which include alloy structural steel and carbon steel and stainless steel, etc. All material are with high quality and competitive price. 
 
Q: How do you guarantee the quality of your product?
A: Firstly, we can provide the certificates from the third party, such as TUV, CE, if you need. Secondly, we have a complete set of inspection system and every process is checked by QC. Quality is the lifeline of enterprise survival.
 
Q: Delivery time?
A: We have ready stock for most of material grades in our warehouse. If the material don't have stock, the delivery lead time is about 5-30 days after receiving your prepayment or firm order.
 
Q: What is the payment term?
A: T/T or L/C.
 
Q: Can you provide a sample for our testing before confirm the order?
A: Yes. We can provide sample to you for approval before you place an order to us. Free sample is available if we have stock.
 
Q: Can we visit your company and factory?
A: Yes, warmly welcome! We can book the hotel for you before you come to China and arrange our driver to our airport to pick you up when you come. 
 Customer visiting :
 
Warmly welcome! Pick up your phone and Call us!
Send us the inquiry here!
We will reply you at the first time.

Contact US:
Annie Wang 
Direct Line:+86 - 21 - 5762 9195