Q355 Carbon Steel Plate

1. Low MOQ and Flexible Production Ability.
2. Quick delivery and standard industry exporting package.
3. Best service with 24 hour`s reply
4.Support payment with T/T,L/C , paypal, kunlun bank, 100% LC ,etc.
5. OEM and ODM, welcome customers to visit our factory for better understanding;
6. Approved by ISO9001, CE, third party inspection such as SGS BV is welcomed;
7. Our factory provide steel products with competitive price and reliable quality (Shandong and Jiangsu);
8. Value friendship and trustworthy, devote to provide long-term service to our distinguished customers.

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Q355 Overview

Q355 steel is a low alloy, high-strength steel that is used in welded structures supporting stress and heavy loads. The Q references the yield point, while the number 355 indicates its yield strength. It also replaced Q345.

Q355 Equivalent Materials

Q355 can be replaced with equivalent materials, including A572 Grade 50 USA ASTM, Q355 China GB/T, and SPFC 590 Vietnam/Japanese JIS.

Characteristics of Q355

Q355 steel is a structural steel with a yield strength of 345 MPa and tensile strength of 450 MPa. It has terrific processing performance and compressive strength, which can be used to manufacture high-pressure gas pressure vessels containing less than 500 liters. Q355 also has a protective layer of rust resistance.

In addition to performance, Q355 has particular elements that prevent atmospheric corrosion. Since it is mild steel, it has a lower carbon content. If more carbon were added to the alloy, it would be reclassified as a cast iron.

Q355 is a newer Chinese steel grade that was designed to replace Q345. Its material density is 7.85 g/cm3 and possesses three quality levels, including Q355B, Q355C, and Q355D. It has great mechanical and hot and cold process properties. In contrast, it has better and more improved mechanical properties when compared to A36 ASTM steel.

Uses of Q355

Q355 steel has excellent mechanical properties, great weldability, and ample corrosion resistance. It can be utilized to manufacture and produce petroleum storage tanks, high-pressure vessels, boilers, ships, power stations, and many other high-load structural parts. Q355 is also widely used to make shipping containers, waste storage containers, weather containers, offshore containers, workshop containers, and toolboxes.

Product Namecarbon steel plate/ carbon steel sheet
Technologycold rolled
SurfaceNormal Black Surface
MaterialQ355,A36,SS400,A283 Gr.A,.Gr.B.Gr.C,A285 Gr.A,.Gr.B.Gr.C,Q235,Q195,Q215
Special UseHigh-strength Steel Plate, High-strength Steel Plate
Terms of paymentT/T,L/C at sight.etc.
Typesteel plate, Boiler Vessel Plate
ApplicationContainer Plate
Processing ServiceBending, WELDING, Decoiling, Cutting, PUNCHING
Place of OriginChina

Q355 Physical Properties

Physical PropertiesMetricUS/Imperial
Density7.80 g/cc0.282 lb/in³

Q355 Mechanical Properties

Mechanical PropertiesMetricUS/Imperial
Hardness, Brinell135135
Hardness, Rockwell B7474
Tensile Strength, Ultimate450 MPa
Tensile Strength, Yield345 MPa
Elongation at Break18 %18 %

21 %21 %
Bulk Modulus160 GPa23200 ksi
Shear Modulus80.0 GPa11600 ksi

Q355 Component Elements Properties

Component Elements PropertiesMetricUS/Imperial
Carbon, C<= 0.23 %<= 0.23 %
Iron, Fe98 %98 %
Manganese, Mn1.35 %1.35 %
Phosphorus, P<= 0.040 %<= 0.040 %
Silicon, Si<= 0.40 %<= 0.40 %
Sulfur, S<= 0.050 %<= 0.050 %
Silicon, Si0.15 – 0.40 %0.15 – 0.40 %
Sulfur, S0.050 %0.050 %









Why Choose Us?


1. who are we?
We are based in Shandong, China, sell to Domestic Market and Abroad Market. There are total about 51-100 people in our office.

2. how can we guarantee quality?
Always a pre-production sample before mass production; Always final Inspection before shipment;

3.what can you buy from us?
stainless steel plate,stainless steel coil,stainless steel sheet,stainless steel pipe and tube,sainless steel bar and other metal.

4. why should you buy from us not from other suppliers?
Runs perennial exports of quality assured steel mills ,including Shanxi TISCO, Baosteel, Shanghai Krupp, Ningbo Baoxin, Guangzhou Lianzhong, Zhangjiagang Pohang, Qingdao Pohang, Sweden AvestaPolarit, Finland OUTKUMPU, Spain Acerinox, South Africa Columbus