• Sourcing Solutions
  • Services & Membership
  • Help & Community

Quick Details

  • Steel Grade: 4140
  • Standard: AISI, ASTM
  • Dimensions: DIA 16mm-100mm
  • Place of Origin: Zhejiang, China (Mainland)
  • Brand Name: 4140-B7
  • Model Number: A193 B7 B7M L7
  • Technique: Hot Rolled
  • Application: Structural Steel Bar
  • Alloy Or Not: Is Alloy
  • Special Use: Cold Heading Steel
  • Type: Alloy Steel Bar
  • colour: black
  • Shape: round bar
  • Material: stainless steel
  • Surface: black or bright
  • Length: 2m to 4m per piece
  • Certification: ISO9001

Packaging & Delivery

Packaging Details High quality ASTM A193 grade B7 threaded rod hot selling 4140round steel barcustomer required
Delivery Time within 15-30 days

High Quality ASTM A193 Grade B7 Threaded Rod Hot Selling 4140 Round Steel Bar

Product Description


our size can be make for:

11,37 mm (+0/-0,11 mm)
14,30 mm (+0/-0,11 mm)

17,31 mm (+0/-0,11 mm)
20,31 mm (+0/-0,13 mm)
26,30 mm (+0/-0,13 mm)
29,63 mm (+0/-0,13 mm)
32,80 mm (+0/-0,16 mm)
35,95 mm (+0/-0,16 mm)
39,15 mm (+0/-0,16 mm)
42,29 mm (+0/-0,16 mm)
45,46 mm (+0/-0,16 mm)
48,64 mm (+0/-0,16 mm)
55,00 mm (+0/-0,19 mm)
61,37 mm (+0/-0,19 mm)
67,72 mm (+0/-0,19 mm)
74,00 mm (+0/-0,19 mm)
80,42 mm (+0/-0,22 mm)
86,77 mm (+0/-0,22 mm)


Packaging & Shipping

Packing:cartons or gunny bags.then on pallets



Why choose our product

· Our thread bars include nut bolt all in compliance with ANSI,DIN,BS,JIS,IFI and other international standars

· Very good quality ensurance,100% test before

· Best delivery time and packing:Optomize production process,and wide stock of steel material with every size,make the best delivery speed

· Competitive price while high quality level



Company Information



Established in 1992,Ningbo Chenglong Special Steel Co.,Ltd.is located in one of Chinas coastal cities,Ningbo City, covering an area of 59,000 square meters.The superior location provides us with very conveninent transportation and good environment. die steel,and alloy tool steel,more than forty 

varieties and one rhousand specifications.We keep thirtyforty thousand tons of special steel in storage allyear.


Our company is developing international markets while developing the markets in China.We have good cooperative relationships with more than 20 foreign importers in different countries and regions now.We sell more than one hundred and fifty thousand tons of special steel each year,because of high quality and on time service.


Our company has introduced automatic horizontal saw machines,turning machines,straighteners and other advanced equipment.Our professional heat treatment department can provide the best services to our customers,including QTAnnealling,Normalizing etc.


We also have established quality surveillance test center in order to make sure our products can reach the domestic and international quality standards.

Our Services


We also have established quality surveillance test center in order to make sure our products can reach the domestic and international quality standards.
We insist on the principles of"honest,high quallity service and reputation first","customer is our God",in order to serve our valued customers with convenient,top speed and the best services.
Providing high quality and favorable prices,we are sincerely looking foward to establishing mutually beneficial and long-term relationships with importers form all over the world.Please feel free to contact us for further information!


   We look forward to cooperating with you!!



Transaction History of the Supplier

Below is the information about the supplier's transactions conducted via Alibaba.com. If you require further details regarding the transaction data, please contact the supplier directly.

Transaction Overview


Transaction Details

This supplier has completedtransactions with buyers from .

Shipping Destination
Transaction Value
Transaction Date
Email to this supplier
China (Mainland) | Manufacturer, Trading Company
Supplier Assessments:
The supplier supports Trade Assurance – A free service that protects your orders from payment to delivery.
Supplier's Trade Assurance Limit: US $64,000
Learn More