Payment Type:T/T,L/C,Paypal,Others
Incoterm:FOB,CFR,CIF,EXW,DDP,DDU
Min. Order:1 Ton
Transportation:Ocean,Land,Air,Express,Others
Port:Qingdao,Tianjin,Shanghai
Model No.: Q235B
Standard: Aisi, Astm, Bs, Din, Gb, Jis
Place Of Origin: China
Species: Steel Plate
Production Process: Hot Rolled, Cold Rolled
Surface Treatment: Coated
Application: Container Plate, Boiler Plate, Flange Plate, Ship Plate
Special Steel: Silicon Steel, Wear Resistant Steel, High-Strength Steel Plate
Tolerance: ±1%, ±3%
Processing Service: Decoiling, Welding, Bending, Cutting, Punching
Packaging: Standard seawhorty package
Transportation: Ocean,Land,Air,Express,Others
Supply Ability: 50K Tons
Port: Qingdao,Tianjin,Shanghai
Payment Type: T/T,L/C,Paypal,Others
Incoterm: FOB,CFR,CIF,EXW,DDP,DDU
Q 275 Mild Steel Sheet
Q275 steel is a Chinese carbon structural steel, “Q” is the first letter of Chinese spelling of “qu fu dian”, the translation is “Yield Point” or “Yield Strength”, “275” is short for the unit value “275 MPa”, and the tensile strength is 410-540 MPa (N/mm2), all data are tested with 16mm diameter steel bars or 16mm thickness steel plates.
The latest executive standard of Q275 steel is GB/T 700-2006, and chemical composition and physical properties are equivalent to JIS standard SS490, ISO standard E275A, no equivalent to ASTM standard.
Q275 mild steel plate has high strength, good plasticity and cutting performance, certain welding performance, small parts can be quenched and strengthened, and used for manufacturing parts with high strength, such as gears and shafts, sprocket, key, bolt, nut, steel for agricultural machinery, conveyor chain and chain link.
Q275 Steel Chemical Composition
| Chemical Composition % |
|
| ||||
Steel Grade | Quality Grade | C (≤) | Si (≤) | Mn (≤) | P (≤) | S (≤) | Deoxidation |
Q275 | Q275A | 0.24 | 0.35 | 1.5 | 0.045 | 0.05 | Rimmed / killed |
| Q275B | 0.21 | 0.35 | 1.5 | 0.045 | 0.045 | Killed |
| Q275C | 0.22 | 0.35 | 1.5 | 0.04 | 0.04 | Killed |
| Q275D | 0.2 | 0.35 | 1.5 | 0.035 | 0.035 | Exceptionally Killed |
Q275 Steel Mechanical Property
Steel Grade Quality Yield Strength (≥N/mm2) Tensile Strength (N/mm2) Elongation (≥%) Impact Test (V notch) Thickness or Dia. (d) mm Thickness or Dia. (d) mm Temp. ℃ Absorbed Energy (Vertical, ≥J) d≤16 16< d ≤40 40< d ≤60 60< d ≤100 100< d ≤150 150< d ≤200 d≤40 40< d ≤60 60< d ≤100 100< d ≤150 150< d ≤200 Q275 Q275A 275 265 255 245 225 215 410-540 22 21 20 18 17 – – Q275B 20 27 Q275C 0 Q275D -20
What is MS Steel Sheet?
Steel is mostly composed of iron. Depending on different amounts of carbon content, there are low-carbon steel (also called mild steel or plain carbon steel), medium-carbon steel, and higher carbon steel.
The following chart shows the differences and characteristics of the three steel types:
Carbon content (wt. %) Microstructure Characteristics Examples Low-carbon steel (Mild steel) Less than 0.25 Pearlite, ferrite Soft, cheap, very ductile, easy to machine and weld AISI105, AISI 316L, Q195, Q215, Q235, 08F, 15Mn, 20Mn Medium-carbon steel 0.25 to 0.60 Martensite Reasonably ductile, hard, strong and not easy to harden AISI 409, 45#, 40CR, 20CR, SCM 435 High-carbon steel (carbon tool steel) 0.60 to 1.25 Pearlite Very hard, strong, unyielding, hard to machine and weld T7, T7A, T8Mn, T8MnA, AISI440C
From the above chart, mild steel is a steel type that contains 0.05%-0.25% carbon. Due to its malleability and ductility, the material is easy to form and machine. Mild steel parts are generally very suitable for stamping, forging. Mild steel is widely used in tools, automotive body parts, construction, and infrastructure.
Mechanical Properties Of Mild Steel
As you could judge from the chart above, mild steel has lower carbon content than other carbon steel. The mild steel has a mere carbon content of 0.25%.
Mild steel has great impact strength, great ductility and weldability, good malleability with cold-forming possibilities. With these properties, CNC-machining mild steel is easier than CNC-machining other types of steel.
The major disadvantage of mild steel is that it has a relatively low tensile strength, which means it’ll break more easily than other types of steel.
Fortunately, a heat-treatment process called carburizing can be used to improve tensile strength. Carburizing is a surface-hardening process that heats the mild steel to a certain temperature then cools down the steel, which makes the steel hardened on the surface when keeping the core of the steel soft and ductile.