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4140 Carbon Steel Flat Bar
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4140 Carbon Steel Flat Bar

1. Competitive price and quality from our own factory
2. Approved by ISO9001, CE, SGS every year
3. Best service with 24 hour`s reply
4. Flexible payment with T/T,L/C
5. Smooth production ability(50000tons/month)
6. Quick delivery and standard exporting package
  • As customers' demands

  • Hongguan

Carbon Steel Flat Bar

We are a leading manufacturer and supplier of SAE 4140 Carbon Steel Flats, manufactured using high quality raw material and advanced technology. Our offered range of SAE 4140 Carbon Steel Flats includes Mild Steel Flats, Alloy Steel Flats, Bearing Steel Flats, Free-cutting Steel Flats and Carbon Steel Flats. These products are tested on various parameters to ensure their flawlessness. Our valuable clients can get these SAE 4140 Carbon Steel Flats products at market leading prices. We are an ISO 9001:2008 registered company and have been recognized as one of the world's leading stockists and manufacturers of quality metals for more than 20 years with a commitment to quick response, unmatched quality, competitive pricing, reliable delivery and exhaustive inventory.

4140 Carbon Steel Flat Bar Description

4140 Carbon Steel Flat Bar
Q195 Q235 Q235b Q345 Q345b Q355 ss400 s45c a36 1045 1080 1084 1095  etc.
2m, 5.8m, 6m, or as required
Hot rolled/cold drawn
5 Ton
Lead Time
7-15 working days after the receipt of 30% deposit
Payment Terms
30% TT for deposit,70% TT /70% LC at sight balance before shipment
Price Terms
Standard Seaworthy package or according to customer's requirements

Carbon flat steel bar

4140 Carbon Steel Flat Bar Chemical Composition

Chemical composition %:
C Si Mn S P Cr Ni Cu
0.27-0.34 0.17-0.37 0.70-1.00 ≤0.035 ≤0.035 ≤0.25 ≤0.30 ≤0.25

4140 Carbon Steel Flat Bar Mechanical Properties

mechanical properties:
Tensile strength  σb Yield   strength  σb Elongation    σb reduction of   area Hardness Impacting Energy Akv (J) Notched bar impact strength
(Mpa) (Mpa) (%) ψ (%) No heat treatment αkv (J/cm2)
min min min min max min min
540(55) 315(32) 20 45 217HB 63 78(8)

Carbon steel flat steel production workshop

Carbon Steel Flat Bar



Our Service/Why Choose Us

(1)Fast delivery time, good quality and reasonable price

(2)We can process different finished products according to your requirements

(3)High production volume will shorten your waiting time

(4)Accept the buyer's specification

(5)Experienced R&D department

For more details about our products, please contact our sales for more information. Thank you for your visit

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Email: lee@hongguansteel.com
Tell: 0086-13812027444
WhatsApp: 0086-13812027444
Address: Room 413, Building No.7, A4, Huarun Landmark Plaza, Maoling Mountain Road No.2, Lixia District, the City of Jinan
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