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TOBO STEEL GROUP CHINA

  • China,Shanghai ,Shanghai
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China Hot Rolled & Ground 4140 Alloy Steel Round Bar for Precision Hardware Manufactur
China Hot Rolled & Ground 4140 Alloy Steel Round Bar for Precision Hardware Manufactur

  1. China Hot Rolled & Ground 4140 Alloy Steel Round Bar for Precision Hardware Manufactur
  2. China Hot Rolled & Ground 4140 Alloy Steel Round Bar for Precision Hardware Manufactur
  3. China Hot Rolled & Ground 4140 Alloy Steel Round Bar for Precision Hardware Manufactur
  4. China Hot Rolled & Ground 4140 Alloy Steel Round Bar for Precision Hardware Manufactur
  5. China Hot Rolled & Ground 4140 Alloy Steel Round Bar for Precision Hardware Manufactur
  6. China Hot Rolled & Ground 4140 Alloy Steel Round Bar for Precision Hardware Manufactur
  7. China Hot Rolled & Ground 4140 Alloy Steel Round Bar for Precision Hardware Manufactur
  8. China Hot Rolled & Ground 4140 Alloy Steel Round Bar for Precision Hardware Manufactur
  9. China Hot Rolled & Ground 4140 Alloy Steel Round Bar for Precision Hardware Manufactur
  10. China Hot Rolled & Ground 4140 Alloy Steel Round Bar for Precision Hardware Manufactur
  11. China Hot Rolled & Ground 4140 Alloy Steel Round Bar for Precision Hardware Manufactur
  12. China Hot Rolled & Ground 4140 Alloy Steel Round Bar for Precision Hardware Manufactur
  13. China Hot Rolled & Ground 4140 Alloy Steel Round Bar for Precision Hardware Manufactur
  14. China Hot Rolled & Ground 4140 Alloy Steel Round Bar for Precision Hardware Manufactur

Hot Rolled & Ground 4140 Alloy Steel Round Bar for Precision Hardware Manufactur

  1. MOQ: 1 PCs
  2. Price: Negotiation
  3. Get Latest Price
Payment Terms L/C, D/A, D/P, T/T, Western Union, MoneyGram
Supply Ability 10000 pcs / month
Delivery Time 15-30Working days
Packaging Details According to your requirements
Productname Alloy Steel Round Bar
Special Pipe API Pipe
Type Steel Metal Bar
Delivery Condition within15 days after received the deposit
Surface Hot Rolled
Corrosion Resistance High
Reduction Of Area >=40%
Impact Value ≥50 J
Grade 1.7225 Alloy
Heattreatment Quenched and Tempered, Annealed
Production Technology Hot Rolled Or Forged Condition
Packing BUNDLES
Shape Round
Diameterrange 6mm to 200mm
Competitive Advantage Good purity and homogeneity.
Brand Name TOBO
Model Number Alloy Steel Round Bar
Certification CE&ISO
Place of Origin China

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  1. Product Details
  2. Company Details

Product Specification

Payment Terms L/C, D/A, D/P, T/T, Western Union, MoneyGram Supply Ability 10000 pcs / month
Delivery Time 15-30Working days Packaging Details According to your requirements
Productname Alloy Steel Round Bar Special Pipe API Pipe
Type Steel Metal Bar Delivery Condition within15 days after received the deposit
Surface Hot Rolled Corrosion Resistance High
Reduction Of Area >=40% Impact Value ≥50 J
Grade 1.7225 Alloy Heattreatment Quenched and Tempered, Annealed
Production Technology Hot Rolled Or Forged Condition Packing BUNDLES
Shape Round Diameterrange 6mm to 200mm
Competitive Advantage Good purity and homogeneity. Brand Name TOBO
Model Number Alloy Steel Round Bar Certification CE&ISO
Place of Origin China
High Light 4140 alloy steel round barhot rolled ground steel barprecision hardware steel bar

Hot Rolled & Ground 4140 Alloy Steel Round Bar for Precision Hardware Manufacturing

 

This 4140 alloy steel round bar combines the structural integrity of hot rolling with the precision of ground surface treatment, tailored specifically for high-demand hardware applications. The hot-rolled base ensures a dense, uniform internal structure with excellent mechanical strength, while the precision ground finish delivers ultra-tight diameter tolerances, a smooth surface and minimal machining allowance—ideal for producing high-precision hardware parts.
 
As a classic medium-carbon alloy steel, 4140 offers outstanding tensile strength, wear resistance and hardenability, with superior performance after heat treatment. It excels in withstanding repeated loads and friction, making it the preferred material for heavy-duty hardware components.
 
Widely used in manufacturing fasteners, hinges, precision shafts, hand tools, locks and hardware accessories. Strict quality control ensures consistent chemical composition and dimensional accuracy, providing a reliable foundation for high-quality hardware production across industrial and commercial sectors.

 

Products round bar
Material SS400 S45C S20C
Standard ASTM A240,GB/T3280-2007,JIS4304-2005,ASTM A167
Length 3-12m
Size 8-400mm
Application ships building industry,petroleum,chemical industries, war and electricity industries, food processing and medical industry, boiler heat exchanger, machinery and hardware fields.
Payment Terms L/C , T/T or Western Union

 

ABOUT US

We specialsied in kinds of steel products more many years,especially in hot rolled steel round bars ,square bars,flat bars ,cold drawn bars and forged bars.
Our main material are all carbon steel and alloy steel ,such as :aisi1020 1035 1045 1055 s20c s35c s45c s55c ss400 a36 c20 c35 c45 ck45 aisi4140/scm440 aisi4340/40crnimoa aisi8620H,40cr,gcr15,sae52100,20Mn,40Mn,St52,St37,S235JR,etc

1. Grade:

45# 45B S45C C45 CK45 Cm45 AISI1045 SAE1045 ASTM1045 XC45 1.0503 0.1191 1.1201

2. Specification:

Dia: 20-300mm, Length:2000-13000mm or as required

3. Process:

Hot rolled, black surface

4. MOQ:

20mt.

5.. Chemical composition:

Grade C Si Mn P S B
45#

0.42

0.50

0.17

0.37

0.50

0.80

Max

0.035

Max

0.035

 
45B

0.42

0.49

0.17

0.37

0.60

0.90

Max

0.035

Max

0.035

0.0005

0.0035

S45C

0.42

0.48

0.15

0.35

0.60

0.90

Max

0.030

Max

0.035

 
1045

0.43

0.50

0.15

0.35

0.60

0.90

Max

0.030

Max

0.050

 

6.Quality condition

 

1): Straightness: 3mm/m (max)
2): Corner Radius: 3(max)
3): The ends will be end cut or gas cut
4): No cracks on the surface

7. Standard:

According to national standard (GB)for our products, if not, supply according to national standards(GB) or agreement.

Standards

ASTM / ASME,GB,DIN, JIS,T14975, etc
Steel Grade
200, 201B , 201H ,301, 303, TP304, TP304L/304L, 321 ,TP321, 316, TP316L, 316L, 316Ti,
Out Diameter
6mm to 2000mm or customized
Wall Thickness
0.5-220mm
Length
5.8m ,6m,or customized
Tolerance
Out diameter : +/-0.15mm ,Thickness: +/-11% of wall thicknessLength: +/-4.5mm - 0mm
Surface
Mirror Polish,Satin Polish,Without Polish,NO.1,NO.4
MOQ
1 ton
Supply ability
3000 tons per month
Packing
3, bundles to be covered by polythene & strapped securely
Payment terms
T/T or L/C,TT 30% in advance ,70% balance after received B/L copy
Delivery terms
FOB CFR CIF EX Works DDU
Delivery time
Within 5-20 days after received the deposit or as client's requirements

 

                                              

 

 

 

 


 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Delivery&packing


Packaging: In wooded cases , pallets or according to clients' requirements


Shipping: Tianjin port, Shanghai port and the other main ports in China


Our service
FAQ
Q:Are you trading company or manufacturer ?
A: We are factory.


Q: How long is your delivery time?
A: Generally it is 5-10 days if the goods are in stock. or it is 15-20 days if the goods are not in stock, it is according to quantity.


Q: Do you provide samples ? is it free or extra ?
A: Yes, we could offer the sample for free charge but do not pay the cost of freight.


Q: What is your terms of payment ?
A: Payment<=1000USD, 100% in advance. Payment>=1000USD, 50% T/T in advance ,balance before shippment.

 

Company Details

Bronze Gleitlager

,

Bronze Sleeve Bushings

 and 

Graphite Plugged Bushings

 from Quality China Factory
  • Business Type:

    Manufacturer,Agent,Importer,Exporter,Trading Company,Seller

  • Year Established:

    1998

  • Total Annual:

    3,000,000-10,000,000

  • Employee Number:

    200~300

  • Ecer Certification:

    Verified Supplier

TOBO GROUP sales head offce in Shanghai.   We are one of the Professional manufacturers Exporter Pipeline products in China .Our company was established in 1998, the plant covers 550, 000 square meters and a construction area of 6,8,000square meters, existing 260 workers and 45 technicia... TOBO GROUP sales head offce in Shanghai.   We are one of the Professional manufacturers Exporter Pipeline products in China .Our company was established in 1998, the plant covers 550, 000 square meters and a construction area of 6,8,000square meters, existing 260 workers and 45 technicia...

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Get in touch with us

  • Reach Us
  • TOBO STEEL GROUP CHINA
  • No.208,Lvdi Road,Baihe Town,Qingpu District,Shanghai,China
  • https://www.tobo-group.com/

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