Carbon Steel Round Hollow Bar 4340 /Sncm439 /40nicrmo8-4/ En24/ 1.6562 Carbon Steel Round Bar

Nov 13, 2025

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Product Description

Carbon Steel Round Hollow Bar 4340 /Sncm439 /40nicrmo8-4/ En24/ 1.6562 Carbon Steel Round BarCarbon Steel Round Hollow Bar 4340 /Sncm439 /40nicrmo8-4/ En24/ 1.6562 Carbon Steel Round BarCarbon Steel Round Hollow Bar 4340 /Sncm439 /40nicrmo8-4/ En24/ 1.6562 Carbon Steel Round Bar

Diameter

10-400mm/as you required

Length

1-12m/as you required

Shape

Round,Square,Rectangular,etc.

Standard

AISI,ASTM,DIN,JIS,GB ,JIS,SUS,EN,etc

MOQ

5Tons

Technique

Hot Rolled/Cold Drawn

Surface Treatment

1. Galvanized 2. PVC,Black and color painting 3. Transparent oil,anti-rust oil 4. According to clients requirement

The tolerance

±0.5mm

Material

GB: Q195, Q215, Q235A, Q235B, Q235C, Q235D, Q255A, 255B, Q275, Q295A, Q295B, Q345B, Q345C, Q345D, Q345E, Q390A, Q390B, Q390C,
Q390D, Q390E, Q420, Q420B, Q420C, Q420D, Q420E, Q460D, Q460E, Q500D, Q500E, Q550D, Q550E, Q620D, Q620E, Q690D, Q690E,etc.

EN:S185,S235JR, S275JR, S355JR, S420NL, S460NL S500Q, S550Q, S620Q, S690Q ,etc.
ASTM: Grade B, Grade C, Grade D, A36, Grade 36, Grade 40, Grade42, Grade 50, Grade 55, Grade 60, Grade 65, Grade 80,4130,4140,5160.etc.
JIS: SS330, SS400, SPFC, SPHD, SPHE,etc.

Application

Widely used in mechanical manufacture,construction field,farm vehicles,agriculture greenhouse,automotive
industry,railway,decoration,steel structure,etc.

Shipment Time

200ton:Within 5days after deposit Customize Size:Within 10days after deposit OEM Product: Within 15 days after deposit

Shipment Time

20000Tons/Month

Carbon Steel Round Hollow Bar 4340 /Sncm439 /40nicrmo8-4/ En24/ 1.6562 Carbon Steel Round BarCarbon Steel Round Hollow Bar 4340 /Sncm439 /40nicrmo8-4/ En24/ 1.6562 Carbon Steel Round Bar

 

1.What is a round bar?

Round bar is a steel bar with a smooth surface which is used for construction that does not request high-strength reinforced concrete works. It is widely used on beam and column stirrups, pipelines, roads, small and medium-sized projects.

 

2.What size is a round bar?

Round bars can range from as thin as 1/8 inch (3mm) in diameter to more than 12 inches (300mm) for specialized uses. The most common sizes usually fall between 1/4 inch (6mm) and 2 inches (50mm).

 

3.Which is better, SS or MS?

Fabrication. As chrome is a hard alloy, stainless steels are much more impact resistant compared to mild steel and (although relatively easy to fabricate) are not as easy to fabricate as mild steel. Mild steel is much more malleable compared to stainless and so is used a lot in general fabrication.

 

4.What is the difference between a round bar and a rod?

Round bars, made from steel or stainless steel alloys, have more carbon than rods. While this composition increases their strength, it also makes them prone to brittleness and cracks. Rods made from mild steel alloys with less carbon are less brittle and more flexible but not as strong as round bars.

 

5.How strong is a round bar?

Compressive Strength
Round Bars: Round bars handle compressive loads very well because their shape helps distribute stress evenly. This makes them especially good for applications where the pressure is centred, as it helps them resist bending or deforming under heavy loads.2024年11月5日