Product Overview
Huaxia-Steel supplies S50C carbon steel plate — a medium-carbon grade under JIS G4051 with approximately 0.50% carbon — directly from Chinese mills to international buyers. S50C offers higher strength and hardness than S45C, making it the preferred choice for wear parts, heavy-duty shafts, and molds where the extra carbon provides better response to induction hardening and improved compressive strength.
We stock S50C plate in thicknesses from 6 mm to 150 mm, widths up to 2,200 mm, and lengths up to 12 m, with optional annealed, normalized, or quenched-and-tempered delivery conditions and full EN 10204 3.1 certification.
Specifications
| Parameter | Range |
|---|---|
| Thickness | 6 – 150 mm (hot-rolled); 3 – 20 mm (cold-rolled on request) |
| Width | 1,000 – 2,200 mm |
| Length | 2,000 – 12,000 mm; cut-to-length available |
| Edge condition | Mill edge or trimmed edge |
| Surface | Mill scale; shot-blasted or pickled on request |
| Flatness | Per GB/T 709 or ASTM A6 (typical ≤ 8 mm/m for thick plate) |
Chemical Composition (JIS G4051)
| Element | S50C (%) |
|---|---|
| Carbon (C) | 0.47 – 0.53 |
| Silicon (Si) | 0.15 – 0.35 |
| Manganese (Mn) | 0.60 – 0.90 |
| Phosphorus (P) | ≤ 0.030 |
| Sulfur (S) | ≤ 0.035 |
Mechanical Properties by Condition
| Condition | Yield (MPa) | Tensile (MPa) | Elongation (%) | Hardness (HB) |
|---|---|---|---|---|
| Annealed (+A) | — | — | — | ≈ 170 – 210 |
| Normalized (+N) | ≥ 375 | ≥ 630 | ≥ 14 | ≈ 190 – 230 |
| Quenched & Tempered | ≥ 490 | ≥ 740 | ≥ 12 | ≈ 220 – 280 |
Dimensional Tolerances (GB/T 709)
| Thickness | Tolerance (N class) |
|---|---|
| 6 – 8 mm | ±0.45 to ±0.60 mm |
| 8 – 15 mm | ±0.50 to ±0.70 mm |
| 15 – 25 mm | ±0.60 to ±0.80 mm |
| 25 – 40 mm | ±0.70 to ±0.90 mm |
| 40 – 80 mm | ±0.90 to ±1.20 mm |
| 80 – 150 mm | ±1.10 to ±1.60 mm |
Manufacturing Standards
- JIS G4051 (material standard for mechanical structural carbon steel)
- GB/T 711 (quality carbon structural steel plate)
- ASTM A830 (structural quality carbon steel plate)
- Delivery conditions: +AR, +A, +N, +QT as specified
- Certification: EN 10204 3.1 with heat-number traceability
Applications
- Plastic mold bases and cavity plates (annealed for machinability)
- Heavy-duty shafts and axles requiring higher strength than S45C
- Gear blanks and pinions (normalized or Q&T)
- Wear plates and sliding surfaces (induction-hardened)
- Die blocks and press tool holders
- General machine components where 0.50% carbon improves hardenability
Quality Assurance
- Full ladle chemistry per heat, verified against JIS G4051 windows
- Ultrasonic testing (UT) available for plate ≥ 20 mm to detect internal defects
- Tensile and hardness testing per lot; results on EN 10204 3.1 certificate
- Dimensional check against GB/T 709 before packing
- Surface inspection for scale, pits, and lamellar tears
- Optional third-party inspection (SGS, BV, TUV) at mill before shipment
Packaging and Shipping
- Standard: stacked and secured with steel strapping, wooden separators
- Heat-number stencils on top piece of each stack; packing list cross-referenced
- 20ft container: up to ~26 tonnes for thin plate; break-bulk or flat-rack for thick plate
- Seaworthy packaging with moisture barrier for tropical routes
- FOB, CFR, CIF, DAP; loading ports: Tianjin, Qingdao, Shanghai
Why Buy S50C Plate from Huaxia-Steel
- Direct mill supply with documented JIS G4051 conformance
- Optional annealing, normalizing, or Q&T to your hardness window
- Cut-to-size flame and plasma cutting available before shipment
- Full traceability and third-party inspection support
Request a Quote
Send us your thickness, dimensions, delivery condition, and quantity for pricing within 24 hours. Email [email protected] or use the inquiry form below.
