Q345C

Q345C Steel Properties and Introduction

Q345C steel is a Chinese GB standard Low Alloy High Strength Structural Steel, material density is 7.85 g/cm3, tensile strength is 470-630 Mpa, and yield strength is 345 MPa (datasheet tested with 16mm diameter steel bars or steel plates). According to GB/T 1591 – 2008, Q345 material has 5 quality grades: Q345A, Q345B, Q345C, Q345D and Q345E. “Q” is the first letter of Chinese Pinyin: “qu fu dian”, which means Yield Point, “345” is short for 345 MPa. For datasheet and specification, please see the tables below.

Q345 steel weldability, cold & hot workability and corrosion resistance are good. Widely used in bridges, ships, boilers, pressure vessels, petroleum storage tanks, lifting transport machinery and other high-load welded structural parts.

Table-1, Chemical Composition of Q345C Steel
Chemical Composition Content (≤%) ≥%
Steel Grade Quality Grade C Si Mn P S Nb V Ti Cr Ni Cu N Mo B Als
Q345 Q345A 0.20 0.50 1.70 0.035 0.035 0.07 0.15 0.20 0.30 0.50 0.30 0.012 0.10
Q345B 0.035 0.035
Q345C 0.030 0.030 0.015
Q345D 0.18 0.030 0.025
Q345E 0.025 0.020

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%.

Table-2, Q345 Mechanical Properties

Mechanical Properties: Yield Strength (≥ N/mm2)
Steel Grade Quality Grade 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
Q345 Q345A ≥345 ≥335 ≥325 ≥315 ≥305 ≥285 ≥275 ≥265
Q345B
Q345C
Q345D ≥265
Q345E

Notes: Ø = Thickness or wire diameter in mm;

1 MPa = 1 N/mm2

Mechanical Properties: Tensile Strength (N/mm2)
Grade Quality Level Ø ≤ 40 40 < Ø ≤ 63 63 < Ø ≤ 80 80 < Ø ≤ 100 100 < Ø ≤ 150 150 < Ø ≤ 250 250 < Ø ≤ 400
Q345 Q345A 470 – 630 470 – 630 470 – 630 470 – 630 450 – 600 450 – 600
Q345B
Q345C
Q345D 450 – 600
Q345E
Ø mm, Elongation (≥%)
Grade Quality Level Ø ≤40 40 < Ø ≤ 63 63 < Ø ≤ 100 100 < Ø ≤ 150 150 < Ø ≤ 250 250 < Ø ≤ 400
Q345 Q345A ≥20 ≥19 ≥19 ≥18 ≥17
Q345B
Q345C ≥21 ≥20 ≥20 ≥19 ≥18
Q345D ≥17
Q345E

Q345 Equivalent

Q345 steel: Q345A, Q345B, Q345C, Q345D, Q345E equivalent to US ASTM, European Germany DIN, British BS, France NF, Japan JIS, and ISO Standard (For Reference)

Q345 Equivalent
China USA Germany Japanese France UK ISO
Standard Grade Standard Grade Standard Grade (steel number) Standard Grade Standard Grade (steel number) Standard Grade (steel number) Standard Grade
GB/T 1591 – 2008 (Year) Q345A ASTM A529/A529M;
ASTM A572/A572M;
ASTM A588/A588M;
ASTM A678/A678M;
ASTM A808/A808M
Grade 50;
Grade 50;
Grade B;
Grade D;
A808M
DIN EN 10025-2;

DIN 17100

S355JR (1.0045),
E355 (1.0060);
St52-3
JIS G3135 SPFC590 NF EN 10025-2 S355JR (1.0045),
E355 (1.0060);
BS EN 10025-2 S355JR (1.0045),
E355 (1.0060);
ISO 630-2 S355C, S355D (S355)
GB/T 1591 – 2008 Q345B Ditto Ditto Ditto Ditto JIS G3135 SPFC 590 Ditto Ditto Ditto Ditto ISO 630-2 S355C, S355D (S355)
GB/T1591 – 2008 Q345C Ditto Ditto DIN EN 10025-2;
DIN 17100
S355J0 (1.0553),
E335 (1.0060);
St52-3
JIS G 3135 SPFC590 NF EN 10025-2 S355JO (1.0553),
E335 (1.0060)
BS EN 10025-2 S355JO (1.0553),
E335 (1.0060)
ISO 630-2 S355D (S355)
GB/T 1591 – 2008 Q345D ASTM A656/A656M;

ASTM A529/A529M

Type 7;

Grade 50

DIN EN 10025-2;
DIN EN 10025: 1993;
DIN 17100
S355J0 (1.0553),
E335 (1.0060);
S355J2G3 (1.0570);
St52-3
JIS G 3135 SPFC590 NF EN 10025-2;
NF EN 10025: 1993
S355J0 (1.0553),
E335 (1.0060);
S355J2G3 (1.0570)
BS EN 10025-2;
BS EN 10025: 1993
S355J0 (1.0553),
E335 (1.0060);
S355J2G3 (1.0570)
ISO 630-2 S355D (S355)
GB/T 1591 – 2008 Q345E ASTM A656/A656M;

ASTM A529/A529M

Type 7;

Grade 50

DIN EN 10025-2;
DIN EN 10025: 1993
S355J2 (1.0553),
S355K2 (1.0596),
E335 (1.0060);
S355J2G4 (1.0577),
S355K2G3 (1.0595),
S355K2G4 (1.0596)
JIS G3135 SPFC 590 NF EN 10025-2;
NF EN 10025: 1993
S355J2 (1.0553),
S355K2 (1.0596),
E335 (1.0060);
S355J2G4 (1.0577),
S355K2G3 (1.0595),
S355K2G4 (1.0596)
BS EN 10025-2;
BS EN 10025: 1993
S355J2 (1.0553),
S355K2 (1.0596),
E335 (1.0060);
S355J2G4 (1.0577),
S355K2G3 (1.0595),
S355K2G4 (1.0596)

Notes: Q345 steel has been replaced byQ355 in the latest version of GB standard “GB/T 1591 – 2018”, the previous version is “GB/T 1591 – 2008”.

mild carbon 28mm thick plate astm a53 gr a boiler pipe q235b steel structure u channel for building material flexible payment 5052 aluminium plate engraving gl a36d36e36f36 ship steel plate odm stamping parts factory low price steel round bar s355 mild steel round bar property of st 52 hot sale in china steel ppr pipe supplier st70 api 5l x65 psl1 line pipe 2 weight ms square hollow section properties stock pipe good quality mild plate sheet alibaba china manufacturer hot rolled coils hrc price a36 q235 mild carbon steel sheets steels schedule 40 carbon steel pipe for pipeline transport q235b steel sheet china mechanical properties hoja de sierra de banda de alta calidad para cortar madera plate corten steel type a hot work alloy mould steel 1 2344 We Export to Following Countries:
Get In touch with
Product SERVICE ONLINE Contact us Steel Material Our Live Inventory:
Shipbuilding steel plate stock
Boiler steel plate stock
Weathering steel plate stock
Hot rolled steel sheet plate stock
Carbon steel plate stock
Alloy steel plate plate stock
Gas cylinder steel plate stock
Q235B steel plate plate stock
A36 steel plate plate stock
Q345B steel plate stock
09CuPCrNi-A steel plate stock
Pipeline steel plate stock
Low-carbon steel plate stock
Pressure vessel steel plate stock
Seamless steel pipe plate stock
Automotive steel plate stock
Wear-resistant steel plate plate stock
Low-alloy steel plate stock
Hot rolled coil plate stock
flat steel plate stock
Cowden Steel plate stock
Weather resistant steel plate stock
Marine engineering steel plate stock
hot work alloy mould steel 1 2344 Plate Manufacturer
hot work alloy mould steel 1 2344 Super Mirror Sheet / Plate Supplier
cold rolled hot work alloy mould steel 1 2344 plate distributor
hot work alloy mould steel 1 2344 Steel Plate dealer
hot work alloy mould steel 1 2344 hot rolled distributor
Carbon Steel diamond checkered platehot work alloy mould steel 1 2344 Resistant exporter
High Quality hot work alloy mould steel 1 2344 Decorative Plate importer
Carbon Steel plate 3mm thick hot work alloy mould steel 1 2344 trader
hot work alloy mould steel 1 2344 Carbon Steel Plates 2B NO.1 stockist
hot work alloy mould steel 1 2344 Steel plates/sheet for elevator decoration stockholder
Best Quality Sales for hot work alloy mould steel 1 2344 Steel Plate for Structural Steel
hot work alloy mould steel 1 2344 Steel Plates manufacturer
1mm thick hot work alloy mould steel 1 2344 Plates dealer
hot work alloy mould steel 1 2344 sheet/ hot work alloy mould steel 1 2344 plate trader
hot work alloy mould steel 1 2344 plate stockholder
hot work alloy mould steel 1 2344 Steel plate manufacturer
hot work alloy mould steel 1 2344 Tested Plates supplier
hot work alloy mould steel 1 2344 finish metal sheet plate distributor
hot work alloy mould steel 1 2344 Resistant Steel suppliers
hot work alloy mould steel 1 2344 Sheet dealer
hot work alloy mould steel 1 2344 for construction importer
hot work alloy mould steel 1 2344 Sheet Price Per kg
hot work alloy mould steel 1 2344 polished sheet prime quality plate supplier
hot work alloy mould steel 1 2344 Steel sheet/plate factory
HIC Tested hot work alloy mould steel 1 2344 Quality Steel Plates trader
hot work alloy mould steel 1 2344 Sheet Price in India
2mm Thick hot work alloy mould steel 1 2344 Steel Plate exporter
hot work alloy mould steel 1 2344 plate supplier
Manufacturer preferential supply High Quality hot work alloy mould steel 1 2344 Steel plate
export heat resistant 6mm hot work alloy mould steel 1 2344 plate manufacturer
About

SIBE STEEL GRADE is specialized in steel plate export. As a professional and reliable steel plate supplier, we have built cooperation with over 30 countries and regions, including USA, Europe, Saudi Arabia, Egypt, Bangladesh, Sri Lanka, Korea, Vietnam, Myanmar and so on.

For any steel plates we do not have in stock, we have developed relationships with a large number of manufacturers, mill depots, and master distributors, which enables us to locate and supply even the most unusual sizes and grades as per customer requirements - so called "one station" services...

Read More
Contact us
Add: Henan, China

Our professional team will reply to you within one business day. Please feel free to contact us!