ASTM 4140 JIS SM440 DIN 42CrMo4 Carbon Alloy Solid Round Steel Bar
What are carbon steels used for?
Carbon steel can be classified into three categories according to its carbon content: low-carbon steel (or mild-carbon steel), medium-carbon steel and high-carbon steel [1]. Their carbon content, microstructure and properties compare as follows:
| Carbon content (wt.%) | Microstructure | Properties | Examples |
Low-carbon steel | < 0.25 | Ferrite, pearlite | Low hardness and cost. High ductility, toughness, machinability and weldability | AISI 304, ASTM A815, AISI 316L |
Medium-carbon steel | 0.25 – 0.60 | Martensite | Low hardenability, medium strength, ductility and toughness | AISI 409, ASTM A29, SCM435 |
High-carbon steel | 0.60 – 1.25 | Pearlite | High hardness, strength, low ductility | AISI 440C, EN 10088-3 |
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 |


FAQ
Q1:Can we visit your factory ?
A: Warmly welcome once we have your schedule we will pick you up .
Q2:What do your factory do regarding quality control?
A: We have gained ISO, CE,API authentication. From material to products, each product has to go through 4-5 processes. Inspection,ccompanied by corresponding quality inspec
Q3: How do you make our business long-term and good relationship ?
A: 1.We keep good quality and competitive price to ensure our customers' benefit. 2.We respect every customer as our friend and wesincerrly do business and make friends with them, no matter where they come from.
Q4: Are you factory?
A: Yes, our factory has been producing and selling stainless steel products for many years. We have experience in many areas
Q5:Are you support OEM?
A: Yes, customer could send us their detail needing request. We will do the goods as customer request.
Q6:Are the products be tested before shipping?
A: Yes, we test every batch goods before shipping to make sure all the goods qualified.
Q7:Will you delivery the goods on time?
A: Yes,we promise to provide best quality products and delivery on time .Honesty is our company's tenet.
Q8:Do you accept the third party inspection?
A: Yes absolutely we accept.