Carbon Steel: Properties, Production, Examples and Applications
Carbon steel is an iron-carbon alloy, which contains up to 2.1 wt.% carbon. For carbon steels, there is no minimum specified content of other alloying elements, however, they often contain manganese. The maximum manganese, silicon and copper content should be less than 1.65 wt.%, 0.6 wt.% and 0.6 wt.%, respectively.
Types of carbon steel and their properties
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 |
Carbon Steel Description
Grade:
1)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
2)EN: S185,S235JR, S275JR, S355JR, S420NL, S460NL S500Q, S550Q, S620Q, S690Q
3)ASTM: Grade B, Grade C, Grade D, A36, Grade 36, Grade 40, Grade42, Grade 50, Grade 55, Grade 60, Grade 65, Grade 80
4)JIS: SS330, SPHC, SS400, SPFC, SPHD, SPHE
PRODUCT DETAILS
| Place of Origin: | China |
| Oiled or Non-oiled: | Non-oiled |
| Alloy Or Not: | Non-Alloy |
| Tolerance: | ±1% |
| Special Pipe: | Thick Wall Pipe,EMT Pipe |
| Out Diameter: | 10-1500mm |
| wall thickness | 0.4-25mm |
| Length: | 1-12m |
| Shape: | Round, Square or Rectangular |
| Itmes: | 4 6 12 inch SCH 40 80 black carbon steel pipe |
| processing service | Bending, Welding, Decoiling, Punching, Cutting |
| Secondary Or Not: | Non-secondary |
| technology | hot rolled, cold rolled, black annealed |
| Keyword: | welded steel pipe |
| End protector: | Plastic Pipe Cap |
| Thickness: | 0.35 - 100mm |
| Standard: | API, ASTM, bs, GB, API 5L, ASTM A106-2006,ASTM A53-2007, BS 1387, BS 1139, BS EN10219, GB 3087-1999, GB/T3901,EN, BS, JIS |
| Technique: | ERW /LSAW/SSAW |
| Surface Treatment: | Paint oil; Varnish; Galvanized; |
| Galvanize the raw strip steel; |
| Certificate: | Bsi, RoHS, SNI, BIS, SASO, SONCAP, sirm, ISO9001,API,ISO |
| Grade: | 10#, 20#, 45#, Q235, Q345, Q195, Q215, ST52, |
| ST42, ST35, 10#-45#, Q195-Q345, ST35-ST52 |
| Q235, Q235B, S275, S275jr, A53, st37, st52 |
| Q195 → Grade B, SS330,SPHC, S185 |
| Q215 → Grade C,CS Type B,SS330, SPHC |
| Q235 → Grade D,SS400,S235JR,S235JO,S235J2 |
| Q345 → SS500,ST52 |
| Usage: | mechanical manufacture, construction field, |
| metallurgy industry, farm vehicles, agriculture greenhouse, |
| automotive industry, railway, highway guardrail, |
| container frame, furniture, decoration, steel structure, |
| Chemical Fertilizer Pipe,Structure Pipe, Building Construction |
| package | Standard Seaworthy Packing |
| tied with steel trips,then wrapped by plastic material |
| or as request |
| Payment Term: | L/C T/T (30%DEPOSIT) |
| Standard | Grade | General Size | Delivery Condition |
| ASTM A36 | A36/A36-B | 5-20 * 2300-2500 * C | Boron added or Black Condition |
| ASTM A283 | A283-B/A283C | 5-20 * 2300-2500 * C | Boron added or Black Condition |
| ASTM A572 | A572Gr50-B/A572Gr42-B | 5-20 * 2300-2500 * C | Boron added or Black Condition |
| ASTM A515 | A515Gr70 | 5-20 * 2300-2500 * C | Boron added or Black Condition |
| ASTM A516 | A516Gr70 | 5-20 * 2300-2500 * C | Boron added or Black Condition |
| JIS G 3101 | SS400-B | 5-20 * 2300-2500 * C | Boron added or Black Condition |
| JIS G3136 | SN400B | 5-20 * 2300-2500 * C | Boron added or Black Condition |
| EN10025-2:2004 | S235JR-S355K2+N | 5-20 * 2300-2500 * C | Boron added or Black Condition |
| EN10025-5:2004 | S355J2W/S355K2W | 5-20 * 2300-2500 * C | Boron added or Black Condition |
| Material | China | FormerSoviet Union | America | England | Japan | French |
| GB | ГOCT | ASTM | BS | JIS | NF |
| High Quality Carbon Structural Steel | 08F | 08KП | 1006 | 040A04 | S09CK |
|
| 8 | 8 | 1008 | 045M10 | S9CK |
|
| 10F |
| 1010 | 040A10 |
| XC10 |
| 10 | 10 | 10,101,012 | 045M10 | S10C | XC10 |
| 15 | 15 | 1015 | 095M15 | S15C | XC12 |
| 20 | 20 | 1020 | 050A20 | S20C | XC18 |
| 25 | 25 | 1025 |
| S25C |
|
| 30 | 30 | 1030 | 060A30 | S30C | XC32 |
| 35 | 35 | 1035 | 060A35 | S35C | XC38TS |
| 40 | 40 | 1040 | 080A40 | S40C | XC38H1 |
| 45 | 45 | 1045 | 080M46 | S45C | XC45 |
| 50 | 50 | 1050 | 060A52 | S50C | XC48TS |
| 55 | 55 | 1055 | 070M55 | S55C | XC55 |
| 60 | 60 | 1060 | 080A62 | S58C | XC55 |
| 15Mn | 15Г | 10,161,115 | 080A17 | SB46 | XC12 |
| 20Mn | 20Г | 10,211,022 | 080A20 |
| XC18 |
| 30Mn | 30Г | 10,301,033 | 080A32 | S30C | XC32 |
| 40Mn | 40Г | 10,361,040 | 080a40 | S40C | 40M5 |
| 45Mn | 45Г | 10,431,045 | 080A47 | S45C |
|
| 50Mn | 50Г | 10,501,052 | 030A52080M50 | S53C | XC48 |