Shandong Baimaoxing Iron and Steel Co., Ltd.
Located in Liaocheng City, Shandong Province, China, Shandong Baimaoxing Iron and Steel Co., Ltd. is a leading comprehensive steel enterprise integrating R&D, precision processing, sales, and professional technical services.
Adopting a science-driven management system and strict quality control standards, our products are widely trusted and applied in key industries including aerospace, military equipment, petrochemicals, automotive parts, shipbuilding, precision machining, transportation & rail, engineering machinery, electrical equipment, and packaging machinery.
- Diversified Portfolio: Carbon steel, stainless steel, and non-ferrous metals.
- Strict Quality Control: Compliant with ASTM, GB, EN, DIN, and JIS standards.
- Global Supply Network: Exporting to over 60 countries and regions.
Hot Rolled vs. Cold Rolled Carbon Steel Coils
Understanding the differences in surface finish, thickness tolerances, mechanical processing, and cost structures is essential for choosing the correct material for your industrial projects.
Surface Quality Comparison
Hot Rolled (HRC): Processed at high temperatures (above recrystallization), resulting in a rough, dark gray surface with mill scale. Suitable for applications where surface aesthetics are secondary.
Cold Rolled (CRC): Pickled and cold-reduced at room temperature, yielding a smooth, bright, and highly reflective surface finish ideal for painting or coating.
Thickness & Dimensional Range
Hot Rolled (HRC): Typically available in thicknesses of 1.5mm and above. Dimensional tolerances are looser due to thermal contraction during cooling.
Cold Rolled (CRC): Usually ranges from 0.2mm to 3.0mm. It provides extremely tight dimensional tolerances (down to ±0.01mm) and consistent thickness.
Processing & Workability
Hot Rolled (HRC): Highly ductile, easy to weld, form, and cut. Ideal for heavy structural steel components, thick plates, and rough machining.
Cold Rolled (CRC): Possesses higher yield strength and hardness due to strain hardening. Excellent for precision stamping, deep drawing, and bending.
Pricing Dynamics & Value Engineering
The manufacturing process of cold-rolled steel coils involves additional steps—including acid pickling, cold rolling, annealing, and temper rolling. These steps refine the grain structure and improve mechanical properties, but also increase production costs.
B2B Purchase Strategy: If your project involves structural support (e.g., bridges, heavy machinery frames) where appearance is hidden, Hot Rolled Carbon Steel Coils offer the most cost-effective solution. If your product requires precision dimensions, high-strength characteristics, or a premium surface finish (e.g., home appliances, automotive body panels), Cold Rolled Carbon Steel Coils are the superior choice.
Typical Applications Matrix
- Hot Rolled Applications: Steel structures, railway tracks, heavy pipeline systems, structural I-beams, agricultural equipment.
- Cold Rolled Applications: Automotive body panels, domestic appliance housings, metal furniture, precision tubing, electrical enclosures, and high-end hardware.
Technical Comparison Matrix
A side-by-side technical evaluation of Hot Rolled (HR) and Cold Rolled (CR) carbon steel coils.
| Technical Parameter | Hot Rolled Carbon Steel Coil (HRC) | Cold Rolled Carbon Steel Coil (CRC) |
|---|---|---|
| Processing Temperature | Above recrystallization temperature (typically ≥ 1,100°C) | Processed at room temperature (after pickling) |
| Thickness Range | Typically 1.5mm to 280mm | Typically 0.2mm to 3.0mm |
| Surface Finish | Rough, oxidized, dark gray (mill scale) | Smooth, bright, oiled or un-oiled, highly reflective |
| Dimensional Tolerance | Looser (due to thermal shrinkage) | Extremely tight (up to ±0.01mm) |
| Mechanical Properties | High ductility, lower yield strength, easy to form | Higher hardness, higher yield strength (strain-hardened) |
| Processing Suitability | Heavy structural welding, cutting, forging | Precision stamping, deep drawing, bending, painting |
| Price Point | Standard (Cost-effective base metal) | Premium (Typically 10-20% higher processing cost) |
Carbon Steel Product Portfolio
Explore our range of hot-rolled and cold-rolled carbon steel products, manufactured to international standards.
Carbon Steel Sheet/Plate
Our premium carbon steel plates cover grades like Q235B, Q355B, A36, and 1045, with customizable thickness (3–150mm) and dimensions up to 2500×12000mm, available in hot/cold-rolled finishes. Featuring excellent weldability, high toughness, and cost-effectiveness, they undergo strict quality testing for uniform performance. Compliant with ASTM and GB standards, they suit construction, machinery manufacturing, pressure vessels, and automotive components for industrial applications.
| Visual Reference | Specification Parameter | Details & Material Grades |
|---|---|---|
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Material Grades | Q235B/Q355B/C/D/E/Q245R/Q345R/NM360/NM400/NM450/NM500/65MN/MN13Q235NHB/Q355NHB/Q355GNHB/Q355GNHD/Q295NHB, A32, D32, E32, F32; A36, D36, E36, F36; A40, D40, E40, F40, AH32, DH32, EH32; AH36, DH36, EH36; AH40, DH40, EH40, 2HGr50 |
| Thickness Range | 1mm ~ 300mm | |
| Width Range | 20mm ~ 3000mm | |
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Length | Customer required (1m - 12m) |
| Zinc Coating (Galvanized) | 30g - 275g/m² | |
| Tolerances | Thickness: ±0.1mm, Width: ±5mm, Length: ±5mm | |
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Surface Treatment | Black / White (Oiled / Pickled) |
| Technique | Hot Rolled / Cold Rolled | |
| Minimum Order Qty (MOQ) | 1 Ton | |
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Payment Terms | T/T, L/C, Western Union, etc. |
| Price Terms | Ex-work, FOB, FCA, CIF, CFR, DDU, etc. | |
| Packaging | Export standard package, suitable for all kinds of transport, or as required | |
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Delivery Time | Within 15 days after receiving deposit |
| Applications | Steel structures, bridges, formwork, shipbuilding | |
| Key Advantages | 1. Competitive pricing with excellent quality 2. Large inventory and fast delivery 3. Extensive export experience and 24-hour service |
Carbon Steel Bar/Rod
Our steel bars are produced from low-carbon, low-alloy high-strength steel using electric arc furnace technology, with scrap metal as the primary component. Featuring a refined composition design and strict process control, these bars offer high purity and consistent performance. The molten steel casting process ensures density and uniformity, resulting in excellent mechanical properties. These bars are widely used in construction, bridges, and heavy machinery, offering outstanding weldability, formability, and corrosion resistance.
| Visual Reference | Specification Parameter | Details & Standards |
|---|---|---|
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Product Name | AISI 4140 Flat Angle 1060 C45 CK45 1095 1020 A36 Q235 SAE 1016 1084 Low Round Carbon 1045 1050 1055 Steel Bar |
| Standard Compliances | ASTM A106, ASTM A53, API 5L Gr.B, DIN17175, DIN1629 | |
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Outer Diameter (OD) | 20mm - 610mm |
| Wall Thickness (WT) | 4mm - 70mm | |
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Dimensional Tolerances | Standard compliance: OD: ±1%, WT: ±10% |
| Material Grades | 10#, 20#, 45#, 16Mn, A106(B,C), A53(A,B), API J55, API K55, Q235, Q345, ST35.8, ST37, ST42, ST45, ST52 | |
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Quality Inspection | ISO, BV, SGS, MTC (Mill Test Certificate) |
| Packaging | Waterproof paper and steel strip bundling. Standard export seaworthy package suitable for all modes of transport. | |
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Supply Capacity | 1,000 Metric Tons/Month |
| MOQ | 5 Metric Tons (Sample orders accepted) |
Carbon Steel Coil
Our carbon steel coil range includes hot-rolled and cold-rolled series, rolled from high-quality base metal with precise dimensional tolerances and smooth surface finishes. They offer excellent stamping and bending performance, making them suitable for home appliance housings, pipe manufacturing, and structural building components. We support production according to GB, ASTM, and JIS standards, offer custom cutting and slitting, and provide tailored packaging and delivery timelines for bulk orders.
| Visual Reference | Specification Parameter | Details & Standards |
|---|---|---|
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Type | Hot Rolled Steel Coil / HRC SS400 Q235 ST37 / Hot Rolled Steel Plate |
| Standard | Steel Grade Specifications | |
| EN10025 | S235JR, S235J0, S235J2 | |
| DIN 17100 | St33, St37-2, Ust37-2, RSt37-2, St37-3 | |
| DIN 17102 | StE255, WstE255, TstE255, EstE255 | |
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ASTM | A36/A36M A36 |
| A283/A283M A283 Grade A, A283 Grade B | ||
| A573/A573M A573 Grade 58, Grade 65, Grade 70 | ||
| GB/T700 | Q235A, Q235B, Q235C, Q235D, Q235E | |
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JIS G3106 | SS330, SS400, SS490, SS540, SM400A, SM400B, SM400C |
| Dimensions | Thickness: 1.5mm - 280mm (Customizable) | |
| Common: 6mm, 8mm, 12mm, 16mm, 20mm, 25mm, 30mm, 50mm, 80mm, 100mm, 150mm, 200mm | ||
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Width: 1000mm, 1219mm, 1250mm, 1500mm, 1800mm, 2000mm, 2200mm, 2500mm, 3000mm | |
| Length: 2000mm, 2438mm, 3000mm, 6000mm, or coil form | ||
| Custom lengths supported | ||
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Quality Testing | Hydraulic Testing, Eddy Current, Infrared Test |
| Surface Finishes | 1) Bare Metal | |
| 2) Black Painted (varnish coating) | ||
| 3) Galvanized (Zinc coated) | ||
| 4) Oiled (Rust prevention) | ||
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Applications | Building construction, bridges, architectural design, vehicle components |
| Shipbuilding, high-pressure containers, boilers, large steel structures |
Carbon Steel Pipe/Tube
Carbon steel pipes are manufactured by piercing steel ingots or solid round steel to form hollow billets, followed by hot rolling, cold rolling, or cold drawing. Carbon steel pipes play a vital role in industrial piping networks and structural engineering worldwide.
| Visual Reference | Specification Parameter | Details & Materials |
|---|---|---|
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Material Grades | 20#/20G/45#/Q355B/C/D/E/27SiMn/20CR/40CR/15CRMO/15CRMOG/20CRMO/35CRMO/42CRMO/P91/P92/12CR1MOV/12CR1MOVG/A106GR.B/A333GR.6/Q195, Q235(A,B,C,D), Q345(A,B,C,D), ASTM A500, A53, A36, S235JR, S235J0H, S235J2H, S275JR, S275J0H, S275J2H, S355JR, S355JOH, S355J2H, C250LO, C350LO |
| Wall Thickness | 1mm ~ 100mm | |
| Width / Diameter | 10mm ~ 3200mm | |
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Length | Customer required (1m - 12m) |
| Tolerances | Thickness: ±0.1mm, Width/OD: ±5mm, Length: ±5mm | |
| Surface Finishes | Black (Self-color) / White (Galvanized) | |
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Techniques | Hot Rolled / Cold Drawn |
| MOQ | 1 Ton | |
| Payment Terms | T/T, L/C, Western Union, etc. | |
| Price Terms | Ex-work, FOB, FCA, CIF, CFR, DDU, etc. | |
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Packaging | Export standard package, suitable for all kinds of transport, or as required |
| Delivery Time | Within 15 days after receiving deposit | |
| Applications | Steel structures, bridges, heavy machinery, fluid delivery pipelines | |
| Key Advantages | 1. Competitive pricing with excellent quality 2. Large inventory and fast delivery 3. Extensive export experience and 24-hour service |
Coated & Galvanized Steel Solutions
Enhance durability and corrosion resistance with our advanced galvanized and prepainted (PPGI/PPGL) steel coils and sheets.
Colored Coated Corrugated Board
Corrugated roofing sheets are primary building cladding materials, mainly produced from galvanized steel, color-coated steel, or aluminum alloy (grades like SGCC, Q235, 3003 aluminum). With thicknesses of 0.3–1.2mm, standard widths of 900–1200mm, and surface treatments like galvanizing or PVDF coating, they offer excellent waterproofing, weather resistance, and load-bearing capacity. They are ideal for industrial workshops, residential roofs, and warehouses.
| Visual Reference | Specification Parameter | Details & Options |
|---|---|---|
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Material Grades | SGCC, SGCH, G550, DX51D, DX52D, DX53D, Q195, Q235, etc. |
| Standard Compliances | GB, JIS, ASTM, BS, DIN, ISO... | |
| Thickness Range | 0.12mm - 0.6mm | |
| Zinc Coating | 40 - 275g/m² | |
| Color Coating | All RAL Classic Color Card options | |
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Width Profiles | 762mm (650-680mm coverage, 9 waves) 914mm (780-815mm coverage, 11 waves) 1000mm (875-930mm coverage, 12 or 14 waves) |
| Length | 1.8 - 12 meters (or custom lengths) | |
| Surface Finishes | 1. Galvanized / 2. PVC, Black or Color Painted / 3. Anti-rust oiled / 4. Custom request | |
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Applications | Construction cladding, roofing, wall panels, household appliances, automotive, shipbuilding, petrochemicals. |
| Trade Terms | EXW, FOB, CIF, CFR | |
| Loading Ports | Shanghai port, Tianjin port, Qingdao port | |
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Payment Terms | 1) 30% deposit by T/T, balance against copy of B/L by T/T |
| 2) 30% deposit by T/T, balance by L/C at sight | ||
| 3) 100% L/C at sight | ||
| MOQ | 1 Ton | |
| Packaging Details | Export packing standard: Waterproof paper and steel strip packed, plastic film and cardboard cover, wooden pallets, iron belt bound. | |
| Delivery Time | Usually within 10-20 days after receiving deposit or L/C | |
| Samples | Free samples provided (freight cost borne by buyer) |
Colored coated Roll / Coil
Color-coated steel coils use hot-dip galvanized/electro-galvanized steel sheets as the base material and are coated with organic coatings (such as PE, PVDF, etc.), offering excellent corrosion resistance, weather resistance, and aesthetics. Various colors and thicknesses can be customized to meet diverse project requirements, including building envelopes, appliance panels, and shelving.
| Visual Reference | Specification Parameter | Details & Options |
|---|---|---|
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Standard Compliances | AISI, ASTM, BS, DIN, GB, JIS |
| Base Material Grades | Galvanized DX51D, SGCC, G550, SPGC | |
| Model Specification | Standard Specification / Custom Grades | |
| Type | Steel Coil / Steel Plate | |
| Techniques | Cold Rolled / Hot Rolled | |
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Surface Treatment | Galvanized and Prepainted Organic Coating |
| Applications | Building materials, construction cladding, steel structures | |
| Processing Services | Bending, Welding, Decoiling, Cutting, Punching | |
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Width Range | 600 - 1250mm (or custom width) |
| Length | Customized coil length / cut-to-length sheets | |
| Tolerance | ±1% | |
| Processing Service | Bending, Welding, Decoiling, Cutting, Punching | |
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Delivery Time | 14 Days |
| Surface Finish | Color Prepainted (Gloss / Matte / Textured) | |
| Zinc Coating | 30 - 275g/m² | |
| Color Options | RAL colors or customer samples matching | |
| Payment Terms | 30% T/T Advance + 70% Balance before shipment | |
| Coating Type | Prepainted Coating (PE, PVDF, HDP, SMP) |
Galvanization Steel Roll / Coil
Galvanized Steel Coil is produced by passing full hard cold-rolled sheets through an acid pickling line and a zinc pot, applying a protective zinc layer to the surface. It provides excellent corrosion resistance, paintability, and workability due to the sacrificial protection characteristics of zinc.
| Visual Reference | Specification Parameter | Details & Options |
|---|---|---|
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Material Grades | Q195, Q235, SGCC, SGCH, SGC340, SGC400, SGC440, SGC490, SGC570, SGHC, SGH340, SGH400, SGH440, SGH490, SGH540, DX51D, DX52D, DX53D, DX54D, S220GD, S250GD, S280GD, S320GD, S350GD, S400GD, S500GD, S550GD |
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Thickness Range | 0.12mm ~ 10mm |
| Width Range | 100mm ~ 2000mm | |
| Length | Customer required (1m - 12m or coil form) | |
| Zinc Coating Weight | 40g/m² - 275g/m² | |
| Tolerances | Thickness: ±0.01mm, Width: ±5mm, Length: ±5mm | |
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Surface Spangle | Regular spangle, minimal spangle, zero spangle, bright big spangle |
| Technique | Cold Rolled base metal | |
| MOQ | 1 Ton | |
| Payment Terms | T/T, L/C, Western Union, etc. | |
| Price Terms | Ex-work, FOB, FCA, CIF, CFR, DDU, etc. | |
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Packaging | Export standard package, suitable for all kinds of transport, or as required |
| Delivery Time | Within 15 days after receiving deposit | |
| Applications | Making pipes, cutting sheets, manufacturing small tools, construction cladding | |
| Key Advantages | 1. Competitive pricing with excellent quality 2. Large inventory and fast delivery 3. Extensive export experience and 24-hour service |
Technical Classification of Carbon Steel
Carbon steel is the most widely used basic steel material globally. It is classified into three categories based on carbon content, with each type optimized for specific performance requirements and industrial scenarios.
- Low-Carbon Steel (≤ 0.25% C): Offers excellent plasticity, formability, and weldability. It is rolled into sheets and structural profiles. Typical grades include Q235 and A36, which are commonly used in building structures, fasteners, and home appliance casings.
- Medium-Carbon Steel (0.25% – 0.6% C): Provides a balance of strength and toughness. Its mechanical properties can be enhanced through forging and heat treatment (quenching and tempering). Typical grades include 45# steel, which is widely used for manufacturing mechanical shafts, gears, and connecting rods.
- High-Carbon Steel (> 0.6% C): Features high hardness and wear resistance, which are enhanced after quenching and tempering. A typical grade is T8, which is suitable for wear-resistant components like cutting tools, springs, and dies.
Our carbon steel products comply with international standards such as GB/T 700, ASTM A36, and JIS G3101. They are available in sheets, profiles, and bars, with thicknesses ranging from 0.5mm to 300mm and diameters from 5mm to 500mm. We package our products with moisture-proof paper, woven cloth, and steel strips, and ship them on ocean-standard pallets to prevent rust during transport. We also provide third-party test reports from SGS and BV.
Coated Steel Structural Details
Understanding the layer structure and protection mechanisms of pre-painted galvanized iron (PPGI) and pre-painted galvalume (PPGL).
Definition: Galvanized color-coated steel (commonly known as color steel plate) is a pre-coated steel product made by taking a hot-dip galvanized plate (GI), electrolytic galvanized plate (EGI), or galvalume plate (GL) as a substrate. After surface pretreatment (degreasing, phosphating, chromating), one or more layers of organic coatings (primer + topcoat) are applied by roller coating, followed by baking and curing. It is internationally known as PPGI (Pre-painted Galvanized Iron) or PPGL (Pre-painted Galvalume).
Core Layer Structure:
- Substrate: Provides structural strength (hot-dip galvanized, electrolytic galvanized, galvalume, or zinc-aluminum-magnesium alloy).
- Zinc Protection Layer: A zinc coating (40–275g/m²) that provides electrochemical protection (sacrificial anode effect).
- Coating System: A primer (to enhance adhesion) and a topcoat (for color and weather resistance), with a total thickness of ≥ 20μm.
Key Product Features:
- Dual Protection: The combination of the zinc layer's corrosion resistance and the organic coating's isolation increases the service life by 3 to 5 times compared to uncoated steel.
- Lightweight & High Strength: It has a density that is 1/3 of concrete, with yield strengths ranging from 300 to 550 MPa.
- Durable Color: Over 30 standard RAL colors are available, with custom color matching upon request, providing color retention for 10 to 20 years.
- Easy Processing: It can be directly bent and stamped without on-site painting, which can save up to 50% in construction time.
Advanced Surface Treatments
We offer customized surface treatment options to protect carbon steel coils from oxidation and enhance their processing performance.
State-of-the-Art Production & Packaging
Our advanced production lines and packaging standards ensure that our steel coils arrive at your facility in optimal condition.
Production Facilities
Seaworthy Packaging
End-Use Applications
Global Shipping Logistics
Proven Track Record & Certifications
We partner with global engineering enterprises and maintain international quality certifications to support your supply chain.
International Qualification Certificates
Our steel products are manufactured and certified in compliance with global quality management systems.
Need a Custom Quote for Your Project?
Contact our sales team today to discuss material grades, custom dimensions, shipping logistics, and volume-based pricing for hot-rolled and cold-rolled carbon steel coils.
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