Q420 steel plate
Q420 steel plate
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- Commodity name: Q420 steel plate
Q420 steel is a Chinese steel grade of Low Alloy High Strength Structural Steel, Yield Strength is 420 MPa and tensile strength is 520-680 Mpa, the material density is 7.85 g/cm3.A wide variety of q420 steel options are available to you, such as hot rolled, cold rolled. You can also choose from steel plate, steel coil, and alloy steel bar q420 steel
Product informationQ420 Steel Introduction
Q420 steel is a Chinese steel grade of Low Alloy High Strength Structural Steel, Yield Strength is 420 MPa, parameters are tested with 16mm diameter steel bars or steel plates, and tensile strength is 520-680 Mpa, the material density is 7.85 g/cm3. According to GB/T 1591-2008, Q420 has 5 quality levels: Q420A, Q420B, Q420C, Q420D and Q420E. For Q420 steel equivalent, chemical composition and mechanical properties, please see the tables below content.
Features and Uses
Q420 steel has high strength, especially in normalized or normalized plus tempered state, with high comprehensive mechanical properties, can be used in large ships, bridges, power station equipment, medium and high pressure boilers, high pressure vessels, lifting machinery, mining machinery and other large welded structural parts.
Chemical composition & Mechanical property
Chemical Composition of Q420 Steel
Chemical Composition % (GB/T 1591 – 2008) Steel Grade Grade C (≤) Si (≤) Mn (≤) P (≤) S (≤) Nb (≤) V (≤) Ti (≤) Cr (≤) Ni (≤) Cu (≤) N (≤) Mo (≤) B (≤) Als (≥) Q420 Q420A 0.20 0.50 1.70 0.035 0.035 0.07 0.20 0.20 0.30 0.80 0.30 0.015 0.20 – – Q420B 0.035 0.035 – Q420C 0.030 0.030 0.015 Q420D 0.030 0.025 0.015 Q420E 0.025 0.020 0.015 Chemical Composition % (GB/T 1591 – 2018) Steel Grade Grade C (≤) Si (≤) Mn (≤) P (≤) S (≤) Nb (≤) V (≤) Ti (≤) Cr (≤) Ni (≤) Cu (≤) N (≤) Mo (≤) B (≤) Q420 Q420B 0.20 0.55 1.70 0.035 0.035 0.05 0.13 0.05 0.30 0.80 0.40 0.015 0.20 – Q420C 0.030 0.030 Table-2, Carbon Equivalent Value (CEV)
Steel delivered in hot rolled state (based on smelting analysis)CEV (Mass fraction ≤%); Nominal thickness or diameter Ø Steel Grade Quality Grade ≤ 30 30 < Ø ≤ 63 63 < Ø ≤ 150 150 < Ø ≤ 250 250 < Ø ≤ 400 Q420 Q420B 0.45 (CEV) 0.47 0.48 0.49 – Q420C Table-3, Q420 Steel Mechanical Properties (Hot rolled)
Thickness or Dia. (Ø) mm; Yield Strength (≥N/mm2) Steel Grade Quality Ø≤16 16< Ø ≤40 40 < Ø ≤63 63 < Ø ≤ 80 80 < Ø ≤ 100 100 < Ø ≤ 150 150 < Ø ≤ 200 200 < Ø ≤ 250 250 < Ø ≤ 400 Q420 Q420B 420 410 390 370 370 350 – – – Q420C Dia. (Ø) mm; Tensile Strength (N/mm2) Steel Grade Quality Level Ø≤100 100 < Ø ≤ 150 150 < Ø ≤ 250 250 < Ø ≤ 400 Q420 Q420B 520 – 680 500 – 650 – – Q420C Table-4, Elongation
Dia. (Ø) mm; Elongation (%) Steel Grade Sample direction Ø≤40 40 < Ø ≤ 63 63 < Ø ≤ 100 100 < Ø ≤ 150 150 < Ø ≤ 200 250 < Ø ≤ 400 Q420 Horizontal 20 19 19 18 – – Vertical 21 20 20 19 – – Q420 steel equivalent to US ASTM, European EN, Germany DIN, Japan JIS, France NF, UK BS and ISO standard (For reference purposes only)
China USA Germany Japanese France UK ISO Standard Grade Standard Grade Standard Grade Standard Grade Standard Grade Standard Grade Standard Grade GB/T 1591 – 2008 Q420A ASTM A572M,
ASTM A633MGr.60,
Gr.ENF A36-201 E420-1 ISO 4996,
ISO 4951HS420D
E420CCGB/T 1591 – 2008 Q420B ASTM A572M,
ASTM A633MGr.60,
Gr.EDIN EN 10113-2,
DIN EN 10113-3S420NL,
S420MLJIS G3124 SEV295,
SEV345NF EN 10113-2,
NF EN 10113-3S420NL,
S420MLBS EN 10113-2,
BS EN 10113-3S420NL
S420MLISO 4996,
ISO 4951HS420D
E420CCGB/T 1591 – 2008 Q420C ASTM A678M,
ASTM A656MGr.B,
TyPe7DIN EN 10113-2,
DIN EN 10113-3S420NL,
S420MLJIS G3124 SEV295,
SEV345NF EN 10113-2,
NF EN 10113-3S420NL,
S420MLBS EN 10113-2,
BS EN 10113-3S420NL
S420MLISO 4996,
ISO 4951HS420D
E420CCGB/T1591 – 2008 Q420D ASTM A678M,
ASTM A656MGr.B,
TyPe7DIN EN 10113-2,
DIN EN 10113-3S420NL,
S420MLJIS G3124 SEV295,
SEV345NF EN 10113-2,
NF EN 10113-3S420NL,
S420MLBS EN 10113-2,
BS EN 10113-3S420NL
S420MLGB/T1591 – 2008 Q420E ASTM A678M,
ASTM A656MGr.B,
TyPe7DIN EN 10113-2,
DIN EN 10113-3S420NL,
S420MLJIS G3124 SEV295,
SEV345NF EN 10113-2,
NF EN 10113-3S420NL,
S420MLBS EN 10113-2,
BS EN 10113-3S420NL
S420MLKey words:- Q420 steel plate
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