Q355 Steel (Q355B Q355C Q355D)

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Q355 Steel (Q355B Q355C Q355D)

2024-07-06 12:14| 来源: 网络整理| 查看: 265

Q355 steel is a Chinese low alloy high strength structural steel, which replaced Q345, the material density is 7.85 g/cm3. According to GB/T 1591 -2018, Q355 has 3 quality levels: Q355B, Q355C and Q355D. “Q” is the first letter of Chinese Pinyin: “qu fu dian”, which means Yield Strength, “355” is the minimum value of yield strength 355 MPa for steel thickness ≤16mm, and tensile strength is 470-630 Mpa.Datasheet and Specification

The tables below shows the Q355 material datasheet and specifications such as chemical composition, and mechanical properties.

Q355 Steel Chemical Composition (Hot rolled)Steel GradeQuality GradeC % (≤)Si % (≤)Mn (≤)P (≤)S (≤)Cr (≤)Ni (≤)Cu (≤)N (≤)Q355Q355B0.240.551.60.0350.0350.300.300.400.012Q355C0.200.0300.0300.012Q355D0.200.0250.025–Carbon Equivalent (CEV)

Based on smelting analysis, steel delivered in hot rolled state.

CEV (Mass fraction ≤%); Nominal thickness or diameter (d)Steel GradeQuality Grade≤ 3030 < d ≤ 6363 < d ≤ 150150 < d ≤ 250250 < d ≤ 400Q355Q355B0.45 (CEV)0.470.470.49–Q355C–Q355D0.49Q355 Mechanical Properties (Hot rolled)

Notes:

1 MPa = 1 N/mm21 GPa = 1 kN/mm2Yield Strength (≥N/mm2), Thickness or Dia. (d) in mmSteel GradeQuality Leveld≤1616< d ≤4040 < d ≤6363 < d ≤ 8080< d ≤ 100100< d≤ 150150 < d≤ 200200 < d ≤ 250250 < d ≤ 400Q355Q355B355345335325315295285275–Q355C–Q355D265Tensile Strength (N/mm2), Dia. (d) mmSteel GradeQuality Leveld≤100100 < d ≤ 150150 < d ≤ 250250 < d ≤ 400Q355B,C,DQ355B470 – 630450 – 600450 – 600–Q355C–Q355D450 – 600Q355 Steel ElongationDia. (d) mm; Elongation (%)Sample directiond≤4040 < d ≤ 6363 < d ≤ 100100 < d ≤ 150150 < d≤ 200250 < d ≤ 400Horizontal201918181717Vertical222120181717Charpy Impact

Charpy (V-notch) impact test temperature and impact absorption energy (KV2/J).

QualityTemperatureLongitudinal Impact Energy (J), ≥Transverse Impact Energy (J), ≥Q355B20 ℃3427Q355C0 ℃3427Q355D-20 ℃34 (for thickness ≥250mm)27 (for thickness ≥250mm)Features and Applications

Q355 steel has good mechanical properties, good weldability, hot and cold processing properties and corrosion resistance. Can be used to manufacture ships, boilers, pressure vessels, petroleum storage tanks, bridges, power station equipment, lifting transport machinery and other higher load welded structural parts.

Q355 Steel Equivalent Grade

Q355 carbon steel equivalent to European EN (German DIN EN, British BSI, French NF…) and ISO standard.

ChinaISOEuropean UnionStandardGradeStandardGradeStandardGrade (Material Number)GB/T 1591 -2018Q355BISO 630-2S355BEN 10025-2S355, S355JR (1.0045)Q355CS355CS355J0 (1.0553)Q355DS355DS355J2 (1.0577)

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Q355 Steel (Q355B Q355C Q355D)

Q355 Steel (Q355B Q355C Q355D)

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