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 . Their carbon content, microstructure and properties compare as follows:
| Carbon content (wt.%) | Microstructure | Properties | Examples |
| Low-carbon steel | < 0.25 | Ferrite, pearlite | Low hardness and cost. High ductility, toughness, machinability and weldability |
| Medium-carbon steel | 0.25 – 0.60 | Martensite | Low hardenability, medium strength, ductility and toughness |
| High-carbon steel | 0.60 – 1.25 | Pearlite | High hardness, strength, low ductility |
PRODUCT DETAILS
| Product Name | Q355B / Q355C / Q355D / Q355NH Carbon Steel Plate |
| Standard | GB/T 1591; Equivalent: EN S355JR/S355NLH, ASTM A572 Gr50 |
| Material | Q355B / Q355C / Q355D / Q355NH |
| Technique | Cold Rolled, Hot Rolled |
| Common Sizes & Thickness | Thickness range: 4mm–120mm Standard width: 1000/1250/1500mm; length: 6000/12000mm Hot selling gauges: 10mm, 16mm, 20mm, 30mm, 40mm |
| Surface Treatment | Hot rolled black mill scale, pickled & oiled, shot blasted with anti-rust primer, anti-rust oil sealed for long-sea export shipment. |
| Temper | Hot rolled as standard; Q355NH delivered in normalized fine grain temper. |
| Origin | China |
| HS Code | 7209250000 |
| Delivery Time | 7-15 days,depends on quantity ordered |
| After-sales Service | 24 hours online |
| Production Capacity | 100000 Tons/Year |
| Loading Port | Any port in China |
| Certificates | ISO9001, SGS, RoHS, EN10204 3.1 Mill Test Certificate |
| Packaging | Standard Sea-worthy Packaging |
| Processing Service | Bending, Welding, Decoiling, Punching, Cutting |
| Tolerance | ±1% |
| MOQ | 5 tons |
| Payment Terms | TT, LC,Cash, Paypal, DP, DA,Western Union or Others. |
| Terms Of Trade | EXW,FOB, CRF, CIF ,CNF or others |
| Exported to | Southeast Asia (Vietnam, Thailand, Indonesia), Middle East (Saudi Arabia, UAE), Eastern Europe construction & heavy equipment manufacturers, Australia logistics container factories. |
| Core Strengths | 355MPa minimum yield strength, higher bearing capacity than Q235 series for heavy loads Graded low-temperature impact resistance: B(20℃), C(0℃), D(-20℃); Q355NH normalized weather-resistant grain structure Outstanding weldability and fatigue resistance for long-term cyclic heavy-load service Optimized manganese micro-alloy formula balances performance and raw material cost Precise flatness tolerance, easy plasma cutting, bending and large component assembly |
| Application | Industrial factory steel frames, tower crane structural beams, container load-bearing girders, heavy machinery bases, bridge auxiliary supports, outdoor weather-resistant construction components (Q355NH). |
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