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Astm A321 Hot Rolled Steel Tube , Quenched Tempered Carbon Steel Bar 6.35 - 241.3mm

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Astm A321 Hot Rolled Steel Tube , Quenched Tempered Carbon Steel Bar 6.35 - 241.3mm

China Astm A321 Hot Rolled Steel Tube , Quenched Tempered Carbon Steel Bar 6.35 - 241.3mm supplier
Astm A321 Hot Rolled Steel Tube , Quenched Tempered Carbon Steel Bar 6.35 - 241.3mm supplier Astm A321 Hot Rolled Steel Tube , Quenched Tempered Carbon Steel Bar 6.35 - 241.3mm supplier Astm A321 Hot Rolled Steel Tube , Quenched Tempered Carbon Steel Bar 6.35 - 241.3mm supplier Astm A321 Hot Rolled Steel Tube , Quenched Tempered Carbon Steel Bar 6.35 - 241.3mm supplier Astm A321 Hot Rolled Steel Tube , Quenched Tempered Carbon Steel Bar 6.35 - 241.3mm supplier Astm A321 Hot Rolled Steel Tube , Quenched Tempered Carbon Steel Bar 6.35 - 241.3mm supplier

Large Image :  Astm A321 Hot Rolled Steel Tube , Quenched Tempered Carbon Steel Bar 6.35 - 241.3mm

Product Details:

Place of Origin: Zhejiang China
Brand Name: Torich
Certification: ISO 9001
Model Number: ASTM A321

Payment & Shipping Terms:

Minimum Order Quantity: 5 Tons
Price: negotiable
Packaging Details: Bundles ( hexagonal ) Wooden boxes Request
Delivery Time: 5-8 weeks
Payment Terms: L/C, D/A, D/P, Western Union, T/T, MoneyGram
Supply Ability: 100000 Tons per year
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Detailed Product Description
Standard: AISI, BS, DIN, GB, JIS Dimensions: 5.5mm-500mm
Technique: Hot Rolled Type:: Carbon Steel Bar
Certificate: ISO9001 Special Use: Free Cutting Steel
Surface Treatment: Polishing Quality Inspection: Chemical Composition
Supply Ability: 100000 Ton/Tons Per Year Port: Shanghai / Ningbo

ASTM A321 Hot-rolled,quenched,and Tempered Carbon Steel Bars 6.35-241.3mm Out Diameter
Astm A321 Hot Rolled Steel Tube , Quenched Tempered Carbon Steel Bar 6.35 - 241.3mm
 
 

1. Scope
 
This specification covers hot-rolled, quenched, and tem-pered carbon steel bars, of the following sections and sizeranges:
1)Rounds, '% to 9/ in. (6.35 to 241.3 mm) incl, indiameter.
2)Squares, '/4 to 5/ in. (6.35 to 139.7 mm) incl,between parallel surfaces.
3)Hexagons, '/4 in. (6.35 mm) and over betweenparallel surfaces.
The values stated in inch-pound units are to be regardedas the standard. The values given in parentheses are forinformation only. .
 

2.Manufacture

 

1)Melting Practice The steel shall be made by one ormore of the following primary processes: open-hearth, basic-oxygen, or electric-furnace. The primary melting may incor-porate separate degassing or refining and may be followed bysecondary melting using electroslag remelting or vacuum arcremelting. Where secondary melting is employed, the heatshall be defined as all of the ingots remelted from a singleprimary heat.

 

2)Discard -A sufficient discard shall be made (from eachingot, when ingot cast) to secure freedom from injurious pipingand undue segregation.

 

3)Heat Treatment:

Cooling -Immediately after rolling, the bars shall beallowed to cool to a temperature below the critical range undersuitable conditions to prevent injury by too rapid cooling.

Quenching and Tempering -The material shall beuniformly heated to the austenitizing temperature, soaked for asufficient length of time to produce the desired change instructure (a group thus heated being known as a quenchingcharge), and quenched in some medium under substantiallyuniform conditions for each quenching charge. The materialshall then be uniformly reheated to the proper temperature fortempering (a group thus reheated being known as a temperingcharge), and allowed to cool uniformly. The temperatureselected for tempering shall not be less than 800F (427C).

Stress Relieving -When it is desirable to minimizeinternal stresses introduced by straightening, the purchasermay specify a stress relief anneal as a final operation.

 

3.Mechanical Properties

 

1)Tensile Properties -The material, after final heat treat-ment and straightening, shall conform to the requirements as totensile properties specified in Table 2.

 

2)Test Specimens: .

Test specimens shall be prepared for testing from thematerial in the quenched and tempered condition.

Specimens shall be taken longitudinally and may betested in full thickness or section, or they may be machined tothe dimensions shown in Figs.4 or Figs.6 of Test Methods andDefinitions A 370. If test specimens are selected conforming tothe dimensions of Fig.6 for sizes 1'/ in. (38.1 mm) and largerin diameter or distance between parallel faces, they shall bemachined from a position midway between the center and the surface of the bar. If test specimens are selected conforming tothe dimensions of Fig.6 for sizes under 1'/h in. in diameter ordistance between parallel faces, they shall be machined fromthe center of the bar.

3)Number of Tests One tension test shall be made fromeach tempering or stress-relieving charge. If more than onequenching charge is represented, one tension test shall be madefrom each quenching charge. If more than one heat is repre-sented in a quenching charge, one tension test shall be madefrom each heat and size. For continuous type of treatment, onetension test shall be made for each 25 tons (23 Mg) of each heator size.

4)Test Methods- Tension tests shall be made in accor-dance with Test Methods and Definitions A 370. The yieldpoint shall be determined by the drop of the beam or halt in thegage of the testing machine, or by the use of dividers, ascovered in Section 12 of Test Methods and Definitions A 370.

 

Outside diameter and wall thickness allow deviation mm

sort code Manufacturing
method
Steel tube size Allowable deviation
WHR
(WHEX)
Hot rolled(extruded)steel tube OD all ±1%Dor±0.50(choose the bigger)
WT ≤20 -15% +0.45
-10%S or –0.30
(choose the bigger)
>20 ±10%S
WHE Heat expand steel tube OD all ±1%D
WT all ±15%S
WCD
(WCR)
Cold drawn(rolled) steel tube OD ≤30 ±0.20
30<D≤50 ±0.30
>50 ±0.8%D
WT 1.5≤S≤3 +12.5%
-10% S
>3 ±10%S

 

Bending of steel tube per meter

OD/mm Bending per meter(mm/m)
≤15 ≤1.5
>15~30 ≤2.0
>30 or D≥351 ≤3.0

 
3.Torich Strength:
1. Torich is the STEEL TUBE MAKER company in China,playing a significant role in domestic market as well as international market.
2. Our products have exported to over 56 countries worldwide, winning a great fame among our customers.
3. There was no quality claim in the past 3 years.
4. First production was started since 1997, our boss worked in steel tube industry for over 10 years before started the own factory, factory engineers with over 30 years manufacturing experience, knowing well about production and inspection technology.
5. We have been exporting steel tubes since 10 years ago, and know well about international standard for steel tubes DIN/EN,ASTM,SAE,BS,GOST,JIS etc,also with great experience of International trading practices.
6. Our team take Timely action within 24 hours after receiving customers' first requirement and enquiry.
7. 100% prompt delivery in the past 3 years.
8. 100% dimensional check and 100% visual inspection on tube surfaces.
9. 100% eddy current test and ultrasonic test for detecting longitudinal and transversal defects.
10.Convenient tranportation: production location is 30 mins high speed train from Shanghai, 2 hours drive from Shanghai
 
Astm A321 Hot Rolled Steel Tube , Quenched Tempered Carbon Steel Bar 6.35 - 241.3mmAstm A321 Hot Rolled Steel Tube , Quenched Tempered Carbon Steel Bar 6.35 - 241.3mmAstm A321 Hot Rolled Steel Tube , Quenched Tempered Carbon Steel Bar 6.35 - 241.3mm 
 

Astm A321 Hot Rolled Steel Tube , Quenched Tempered Carbon Steel Bar 6.35 - 241.3mm
 
FAQ
 
 How to get the sample?
1.You are requested to pay for sample charges and courier charges from China to your country; and the free sample is according the product like size, steel grade and quantity, please consult our sales for details
2.Sample charges will be refunded when order is placed.
What is your Payment Term?
1.T/T: 30% deposit in advance, the balance 70% paid before shipment
2.30% down payment, the balance 70% paid against L/C at sight
3.Upon negotiation
Who are your customers?
1.Stockists, Distributors,Wholesalors,Agents, Traders, End Users, etc
How long will you react on our requirement?
1.Your requirement would be treated within 24 hours on weekdays. Quotations would be sent upon technical details confirmed by customer!
 
Any more questions about your doubts, please feel free to send us your emails or call!

Contact Details
TORICH INTERNATIONAL CO.,LTD

Contact Person: Vivian He

Tel: +8618958207675

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