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Q550D Carbon Steel Plate
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Q550D steel is classified into Class A, Class B, Class C, and Class K. The ASTM A588 steel specification is based on the standard specification for high-strength low-alloy structural steel with a lower yield point of up to 50ksi for applications requiring high strength and corrosion resistance.
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Product Parameters

Carbon Steel: Properties, Production, Examples and Applications


Carbon steel is an iron-carbon alloy, which contains up to 2.1 wt.% carbon. For carbon steels, there is no minimum specified content of other alloying elements, however, they often contain manganese. The maximum manganese, silicon and copper content should be less than 1.65 wt.%, 0.6 wt.% and 0.6 wt.%, respectively.


Types of carbon steel and their properties


Carbon steel can be classified into three categories according to its carbon content: low-carbon steel (or mild-carbon steel), medium-carbon steel and high-carbon steel [1]. Their carbon content, microstructure and properties compare as follows:


Carbon content (wt.%)MicrostructurePropertiesExamples
Low-carbon steel< 0.25Ferrite, pearliteLow hardness and cost. High ductility, toughness, machinability and weldability
Medium-carbon steel0.25 – 0.60MartensiteLow hardenability, medium strength, ductility and toughness
High-carbon steel0.60 – 1.25PearliteHigh hardness, strength, low ductility

Carbon Steel Description



Grade:


1)GB: Q195, Q215, Q235A, Q235B, Q235C, Q235D, Q255A, 255B, Q275, Q295A, Q295B, Q345B, Q345C, Q345D, Q345E, Q390A, Q390B, Q390C,Q390D, Q390E, Q420, Q420B, Q420C, Q420D, Q420E, Q460D, Q460E, Q500D, Q500E, Q550D, Q550E, Q620D, Q620E, Q690D, Q690E


2)EN: S185,S235JR, S275JR, S355JR, S420NL, S460NL S500Q, S550Q, S620Q, S690Q 


3)ASTM: Grade B, Grade C, Grade D, A36, Grade 36, Grade 40, Grade42, Grade 50, Grade 55, Grade 60, Grade 65, Grade 80 


4)JIS: SS330, SPHC, SS400, SPFC, SPHD, SPHE


PRODUCT DETAILS


A588  Carbon Steel Plate Description
A588 carbon steel plate has been specially treated to show good corrosion  resistance. It can resist corrosion from the atmosphere, sea water, salt  spray and other environments, thus extending its service life. For another, A588 carbon steel plate is made of high-strength steel and has high yield strength and  tensile strength, which can meet the requirements of various structural  parts. The plate also has good welding performance, is easy to weld and  process, and therefore improves the efficiency of engineering  installation. A588 carbon steel plates are suitable for various structural parts that require  corrosion resistance and high strength, such as bridges, buildings, ships,  vehicles, etc.


Product   Parameters
Product NameA588   Carbon Steel Plate
Production   ProcessHot   Rolling, Cold Rolling
Material   StandardsAISI, ASTM, ASME,   DIN, BS, EN, ISO, JIS, GOST, SAE, etc.
Width100mm-3000mm
Length1m-12m, or   Customized Size
Thickness0.1mm-400mm
Delivery   ConditionsRolling,   Annealing, Quenching, Tempered or Standard
Surface   ProcessOrdinary, Wire   Drawing, Laminated Film


Chemical  Composition
A588CMnPSNiSiCr
GradeA≤ 0.190.80~1.25≤ 0.04≤ 0.05≤ 0.400.30-0.650.40-0.65
GradeB≤ 0.200.75~1.35≤ 0.04≤ 0.05≤ 0.500.15-0.500.40-0.70
GradeC≤ 0.150.80~1.35≤ 0.04≤ 0.050.25-0.500.15-0.400.30-0.50
GradeK≤ 0.170.50~1.20≤ 0.04≤ 0.05≤ 0.400.25-0.500.40-0.70
Mechanical  Properties
A588Tensile  StrengthYield  StrengthElongation 200mm%Elongation 50in%
Thickness≤100mm4853451821
Thickness>100-125mm460315-21
Thickness>125-200mm435290-21
Physical  Performance
Physical PerformanceMetricImperial
Density7.75g/cc0.280 lb/in³
Scope of  Application
ASTM  A588 steel is known for its weather resistance. When exposed to external  conditions, its corrosion resistance becomes stronger even if it is not  painted. ASTM A588 steel has four times the corrosion resistance of carbon  steel. The application of ASTM A588 steel is very wide. In addition to its  typical application in welded bridges and buildings, this specification is  also widely used in railway passenger cars; including transmission towers and  telephone towers, trucks, bridges and gusset plates, and housing shells. ASTM  A588 steel also maintains a good strength-to-weight ratio, meeting the high  strength requirements of carbon steel with less weight.


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Product Display

We adopt high standard production processes, select high-quality steel raw materials, and provide diverse product specifications and models. All steel products have passed strict quality testing, with smooth and even surfaces, precise dimensions, excellent compressive strength, corrosion resistance, and processability. Support customized thickness, length, and special process requirements to meet different usage standards in different scenarios. Clear display of high-definition detailed images and technical parameter tables of the physical object, ensuring transparent and visible quality.

Product Application

This product is widely used in the fields of building structures, mechanical manufacturing, automotive parts, energy equipment, and home hardware, and is suitable for scenarios such as load-bearing frames, precision parts, and industrial pipelines. With excellent physical performance and stability, it can easily meet the demands of high strength, high wear resistance, and extreme environments. Support collaboration with engineering teams to provide material selection suggestions and assist clients in efficiently implementing their projects.

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Product Packaging

Adopting a professional industrial packaging solution that is moisture-proof and scratch resistant, each batch of steel is tied and fixed with customized wooden frames/steel strips, combined with anti rust coatings and cushioning pads to ensure zero damage during transportation. Clear product model, batch number, and storage identification on the outer packaging, supporting customized enterprise logos and information labels. Environmentally friendly and recyclable packaging materials practice green concepts, reducing transportation and disassembly costs.

Factory Display

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FAQ

How to ensure product quality?

We will provide the product quality inspection certificate before delivery. If necessary, you can also arrange for a third-party quality inspection company to inspect the goods.

What is your MOQ?

Our minimum order quantity is 5 tons, but if it is less than 5 tons, it is also possible, but the price will be slightly higher

What is your payment term?

TT: 30% down payment and 70% balance before shipping

LC at sight

Can you provide samples to test?

Yes, we provide customized samples within 3 days. Please share your technical specifications so we can prepare the most relevant samples for your testing requirements.

Are you a manufacturer or a trading company?

We are a direct manufacturer with our own factory. This allows us to control quality, cost, and lead times efficiently. You can expect competitive pricing, customization options, and strict quality control since we oversee the entire production process.

What is your lead time?

Small orders (<100T): 7-15 days

Medium orders (100-500T): 15-30 days

Large orders (>500T): Negotiable
Contact our sales team for a customized production plan.

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