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”.

square tube price list philippines jis standard hot rolled u tape channel sa517 grb boiler and pressure vessel plate sa516 gr70 high quality ss400 q235 a36 a283 high tensile steel plate mild steel angle bar supplier in malaysia sch40 cold rolled carbon steel pipe with and cheap a36 steel sheet used in bridge engineering width buy dnv fq56 in china 8mm plate mild steel sheet metal for sale with high quality competitive price standard plate sizes grade q235b B20AT1500 steel sizes manufacturer preferential supply od508mm id452mm carbon buy large diameter seamless steel pipe jis standard steel angle bar for building material plate corten steel type a shanbao crusher spare parts jaw plate for sale manufacture european standard s275jr equal angle specification bs 4360 grade 50d steel hot sale high quality factory produce steel flat bar a131 grade a offshore steel 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
a131 grade a offshore steel Plate Manufacturer
a131 grade a offshore steel Super Mirror Sheet / Plate Supplier
cold rolled a131 grade a offshore steel plate distributor
a131 grade a offshore steel Steel Plate dealer
a131 grade a offshore steel hot rolled distributor
Carbon Steel diamond checkered platea131 grade a offshore steel Resistant exporter
High Quality a131 grade a offshore steel Decorative Plate importer
Carbon Steel plate 3mm thick a131 grade a offshore steel trader
a131 grade a offshore steel Carbon Steel Plates 2B NO.1 stockist
a131 grade a offshore steel Steel plates/sheet for elevator decoration stockholder
Best Quality Sales for a131 grade a offshore steel Steel Plate for Structural Steel
a131 grade a offshore steel Steel Plates manufacturer
1mm thick a131 grade a offshore steel Plates dealer
a131 grade a offshore steel sheet/ a131 grade a offshore steel plate trader
a131 grade a offshore steel plate stockholder
a131 grade a offshore steel Steel plate manufacturer
a131 grade a offshore steel Tested Plates supplier
a131 grade a offshore steel finish metal sheet plate distributor
a131 grade a offshore steel Resistant Steel suppliers
a131 grade a offshore steel Sheet dealer
a131 grade a offshore steel for construction importer
a131 grade a offshore steel Sheet Price Per kg
a131 grade a offshore steel polished sheet prime quality plate supplier
a131 grade a offshore steel Steel sheet/plate factory
HIC Tested a131 grade a offshore steel Quality Steel Plates trader
a131 grade a offshore steel Sheet Price in India
2mm Thick a131 grade a offshore steel Steel Plate exporter
a131 grade a offshore steel plate supplier
Manufacturer preferential supply High Quality a131 grade a offshore steel Steel plate
export heat resistant 6mm a131 grade a offshore steel 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!