ISO Grade 8.8 Equivalent Steel Round Bar

• Type: Alloy Steel Bar
• Application: Structural Steel Bar, Tool Steel Bar, Die Steel Bar
• Alloy: Alloy
• Special Use: Mold Steel, Free Cutting Steel, Cold Heading Steel
• Products: Grade 8.8 Quenched and Tempered Qt Steel Round Bar
• Key Word: Grade 8.8 Round Bar
• Model NO.: ISO Grade 8.8 Equivalent Steel Round Bar
• Delivery Condition: Quenched and Tempered
• Certificate: ISO 9001
• MOQ of Grade 8.8 Qt Round Bars: 1ton Per Size
• Straughtness of 8.8 Qt Round Bar: Max 1mm /M
• Application Field: Anchor Bolts, Threaded Rods , Bolts etc
• Transport Package: Standard Export Packing
• Specification: M12-M100
• Trademark: Laiwu Xincheng
• Origin: China
• HS Code: 72283090
• Production Capacity: 3000tons/Month

Product Description

grade 8.8 quenched and tempered qt steel round bar

1.Introduction of Grade8.8 QT steel bar
Gr.8.8 round bars is the right material for Gr.8.8 threaded rods, anchor bolts, stud bolts , such high strength steel round bars, our processing usually have : Hot rolled, Hot rolled+Q&T, Cold drawn+Q&t, Peeled+Q&T and so on.

Our QT processing will be done through the Medium frequency quenching furnace, which can gurantee the good straightness. so during the production of threading, it will have no hurt to the mould.

2.Material of Grade 8.8 QT round bar can use:

Sizes	GB	ASTM	JIS	DIN
Up to 30mm	40Cr	5140	SCr440	41Cr4(1.7035)
Up to 65mm	45#	1045	S45C	C45

3.Chemical Composition for 40Cr and 45# 

Grade	C	Si	Mn	Cr	P(≤)	S(≤)
40Cr / 5140	0.37-0.44	0.17-0.37	0.5-0.8	0.8-1.0	0.035	0.035
45# / C45	0.42	0.17-0.37	0.5-0.8	Max 0.3	0.035	0.035

4.Gr.8.8 Steel properties

Yield Strength(MPa)	Tensile Strength(MPa)	Elongation(%)	Reduction of area (%)	Hardness(HRC)
660(min)	830(mIn)	12%(min)	52%(min)	Max 32

5.Delivery condition and sizes we can offer:
Hot rolled :16mm to 300mm
Cold Drawn:6mm to 100mm
Q&T (Quenched&Tempered): 6mm to 300mm

6.Advantages of our Grade8.8 steel round bar
Smoth surface and Good straightness
Precision size tolerance for cold drawn & QT steel 
Customized length 
Standard mechanical proeprties
Uniformed hardness
Anti-rusty packages
Competitive price
Large quantity stock
Fast delivery
Professional service

7.MOQ: 1ton per size

8.Delivery time : 7-30 days upon to your order details.

9.Quality control:
Process for Steel round bar
Blast Furnance→ Molten Iron Pretreatment→Converter→LF→VD/RH→ContinuousCasting→Hot Rolling(KOCKS)→ Heat Treatment→ UT Inspection→Finish Product
EAF→LF→VD/RH→ Continuous Casting→Hot Rolling(KOCKS)→ Heat Treatment→ UT Inspection→ Finish Product
We company have good QC inspection tear and full set of inspect equipment including: UT test machine, Tensile testing machine,Hardness testing machine,Dimensional measuring instrument,f,spectrometer,Metallographic microscope and so on, so that we can always supply good mateterials for various projects and industries , if you have any need for our producrs,please contact us freely.

10.Why choose us :
Capability from Raw material to processing to final products under one Roof .          
 Highest customer satisfactionEconomy of products                      
Absolute reliability                                              
Highly-qualified and motivated personnel                                    
No tolerance of errorsContinuous optimisation of all processes              
To stand apart from competition, the company provides  unparalleled value added services to its esteemed customers. The company is pledged to honor its commitment for every order and when great products are backed-up by great services, the combination becomes irresistible.


Grade 8.8 round bars we supply has following advantages: Smoth surface: For both hot rolled and cold drawn steel bars Good straightness: 0.5mm/m for cold drawn bars and 1mm/m for hot rolled bars Precision size tolerance: h9 - h11 for cold drawn steel bars Customized length: 12ft, 6000mm or other cutting length Standard mechanical proeprties: According to ISO GRADE 8.8 Bolt material Uniformed hardness: On whole bars Anti-rusty packages: Film wrapped inside, Nylon plastic bag wrapped outside with belt Competitive price: grade 8.8 round bars with most competitive price Large quantity stock: Stock of Diameters such as M12, M16, M18, M20, M22, M24, M25, M27, M28, M30, M32, M34, M35, M36, M38, M40, M42, M45, M48, M50, M52, M55, M56, M58, M60, M64, M65, M70, M72, M74, M75, M80 anchor bolts round bars Fast delivery: Within two weeks for stocks Professional service: Packing, color painting, cutting, Chamferring, Exporting, Documentary etc.