Q345 Steel Q345A Q345B Q345C Q345D Q345E Seamless Steel Pipe / SMLS Pipe

Brand Name:DELTA
Certification:ISO
Model Number:Carbon Steel , Alloy Steel
Minimum Order Quantity:4 Tons
Delivery Time:5 - 10 days based on the quantity
Payment Terms:L/C, Western Union, T/T
Contact Now

Add to Cart

Verified Supplier
Location: Wuxi Jiangsu China
Address: No.283-1, Youyi Middle Road, Xishan District, Wuxi City, Jiangsu Province
Supplier`s last login times: within 1 hours
Product Details Company Profile
Product Details

Q345 Steel: Q345A Q345B Q345C Q345D Q345E Seamless Steel Pipe / SMLS Pipe

S355J2 Tube Specifications and Thickness

NameHot Rolled Seamless Steel Pipe
SurfaceBare,oiled
MaterialASTM A106B, ASTM A53B, API 5L Gr.B, ST52, ST37, ST44 SAE1010/1020/1045,S45C/CK45,SCM435,AISI4130/4140 / 4137
MOQ5 tons for normal size and material
WTAs customer's requests
Payment termsTT deposit + the balanced against BL copy / LC or 100% LC at sight
Trade termsFOB,C&F,CIF,EXW
Lengthfixed or random,as customer request.
End TreatmentPlain(can be beveled, threaded,punch,shrink,extension... )
Lead timewithin 7 days from stock with 6m length (stock pipe with our factory name in Chinese),20-25 days for customized pipe according to the qty

Q345 Steel: Q345A, Q345B, Q345C, Q345D & Q345E

Q345 steel is a Chinese standard low alloy high strength structural steel. The material has a minimum yield strength of 345 MPa (50 ksi), and tensile strength of 470-630 Mpa (68-91 ksi). It has better properties than Q235. According to GB/T 1591 – 2008, Q345 material has 5 quality grades: Q345A, Q345B, Q345C, Q345D and Q345E.

Meaning & Designation

  • “Q” is short for Pinyin: “Qu”, which means Yield strength;
  • “345” indicates the steel has a minimum value of yield strength 345 MPa for steel diameter/thickness ≤16mm.
  • A, B, C, D and E indicate the quality grade.

Properties, Datasheet and Specification

Q345, Q345A, Q345B, Q345C, Q345D and Q345E steel properties, datasheet and specification are listed in the tables below, including chemical composition, physical and machenical properties, etc.

Chemical Composition

Chemical Composition Based on melting analysis.

Chemical Composition (≤%)
Steel GradeQuality GradeCSiMnPSCrNiMoCuTiNNbVBAl, ≥
Q345Q345A0.200.501.700.0350.0350.300.500.100.300.200.0120.070.15
Q345B0.0350.035
Q345C0.0300.0300.015
Q345D0.180.0300.025
Q345E0.0250.020

Notes: The P and S contents of profiles and bars can be increased by 0.005%, and the upper limit of Grade A steel can be 0.0045%.

Q345 Material Mechanical Properties

Q345 material mechanical properties are listed in the table below, including yield strength, tensile strength and elongation.

Yield Strength, MPa (ksi), ≥
Steel GradeQuality Gradet ≤1616< t ≤ 4040 <t ≤ 6363 <t≤ 8080 < t ≤ 100100 < t ≤ 150150 < t ≤ 200200 < t ≤ 250250 < t ≤ 400
Q345Q345A345 (50)335 (49)325 (47)315 (46)305 (44)285 (41)275 (40)265 (38)
Q345B
Q345C
Q345D265 (38)
Q345E

Notes:

  • t= Thickness or diameter (mm);
  • 1 MPa = 1 N/mm2
Tensile Strength, MPa (ksi)
GradeQuality Gradet≤ 100100< t ≤250250< t ≤400
Q345Q345A470-630 (68-91)450-600 (65-87)
Q345B
Q345C
Q345D450-600 (65-87)
Q345E
Elongation (%, ≥)
GradeQuality Gradet≤4040 <t ≤ 6363 < t≤ 100100 <t≤ 150150 < t ≤ 250250 <t ≤ 400
Q345Q345A2019191817
Q345B
Q345C2120201918
Q345D17
Q345E

Charpy Impact

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

QualityTemperature, °C (°F)12≤t≤150 (mm)150<t≤250 (mm)250<t≤400 (mm)
Q345B20 (68)≥34J≥27J
Q345C0 (32)
Q345D-20 (-4)27J
Q345E-40 (-40)

Physical Properties

Density: 7.85 g/cm3 (0.284 lb/in3)

Melting point: 1450-1530 °C (2640-2800 °F)

Applications

Q345 steel has high strength, excellent weldability, cold & hot workability and certain corrosion resistance. It is widely used in bridges, ships, boilers, pressure vessels, petroleum storage tanks, lifting transport machinery and other high-load welded structural parts.

Q345 Steel Equivalent

Q345 steel: Q345A, Q345B, Q345C, Q345D, Q345E equivalent ASTM, European, German, British, France, Australian, Canadian, Japanese and Indian Standard (For Reference).

Notes: Q345 steel has been replaced by Q355 in the latest version of GB standard “GB/T 1591 – 2018”, the previous version is “GB/T 1591 – 2008”.

Low Alloy Structural Steel Q345 Equivalent
ChineseUSEuropeanAustralianCanadianIndianJapaneseISO
StandardGradeStandardStandardGrade (steel number)StandardGradeStandardGrade: Imperial (SI)StandardGradeStandardGradeStandardGrade
GB/T 1591 – 2008Q345AASTM A529 Grade 50 [345] ;
ASTM A572 Grade 50 [345];
ASTM A588;
ASTM A678 Grade A
GBT 1591 – 2008Q345BEN 10025-2;
DIN 17100
S355, S355JR (1.0045),
E355 (1.0060);
St52-3
AS/NZS 3678350CSA G40.20/G40.2150W (350W)IS 2062E350JIS G3135SPFC 590ISO 630-2S355C, S355D (S355)
GB1591 – 2008Q345CEN 10025-2;
DIN 17100
S355J0 (1.0553),
E335 (1.0060);
St52-3
AS/NZS 3678350L0CSA G40.20/G40.2150W(350W)IS2062E 350JIS G 3135SPFC590ISO 630-2S355D
GB 1591 – 2008Q345DASTM A656 Grade 50 [345];
ASTM A529 Grade 50 [345]
EN 10025-2;
EN 10025: 1993;
DIN 17100
S355J0 (1.0553),
E335 (1.0060);
S355J2G3 (1.0570);
St52-3
AS/NZS 3678350L20CSA G40.20/G40.2150W (350W)IS 2062E350JIS G 3135SPFC590ISO630-2S355D
GBT 1591 – 2008Q345EASTM A656/A656M Grade 50 [345];
ASTM A529/A529M Grade 50 [345];
ASTM A808
EN 10025-2;
EN 10025: 1993
S355J2 (1.0553),
S355K2 (1.0596),
S355J2G4 (1.0577),
S355K2G3 (1.0595),
S355K2G4 (1.0596)
AS/NZS 3678350L40CSA G40.20/G40.2150W(350W)JIS G31

China Q345 Steel Q345A Q345B Q345C Q345D Q345E Seamless Steel Pipe / SMLS Pipe supplier

Q345 Steel Q345A Q345B Q345C Q345D Q345E Seamless Steel Pipe / SMLS Pipe

Inquiry Cart 0