High Hardness Color Steel Sheet - Mill Direct Supplier

Xinpeng Color Coating Co., Ltd.

Verified Custom manufacturer · 2 yrs ·

China

Customizable Rock-bottom price

$620 1-49 ton Base price

$593 50-99 ton 4.4% off

$579 ≥100 ton 6.6% off

Price validity: subject to market conditions

Supplier's customization ability

Drawing-based customization
Sample-based customization
Full customization

Quantity

Minimum order quantity: 1 ton

Shipping total: To be negotiated

Subtotal of goods US$ 620.00

Start order request

Payment and delivery

Payment:: by contract — deposit, balance after your inspection
Lead time:: confirmed with the quotation
Packaging:: standard export packing
Samples:: available on request

Product details

Technical Specifications of High Hardness Color Steel Sheet

Property	Parameter	Description
Product Name	High Hardness Color Steel Sheet	Pre-painted high-strength steel sheet with enhanced surface hardness
Material Grade	Q550D / S550GD / HX550YD	Equivalent to ASTM A1008 Grade 80, EN 10346 S550GD, JIS G3312 CGCC
Standard Compliance	GB/T 12754, EN 10346, ASTM A755	Meets international pre-painted steel coil and sheet standards
Chemical Composition (C)	≤ 0.12%	Low carbon content for improved formability and coating adhesion
Chemical Composition (Mn)	≤ 1.70%	Manganese for solid solution strengthening
Chemical Composition (Si)	≤ 0.50%	Silicon for deoxidation and strength enhancement
Chemical Composition (P/S)	P ≤ 0.025%, S ≤ 0.020%	Controlled impurity levels for improved toughness
Tensile Strength	550–700 MPa	Per EN 10346 S550GD; high-strength grade for structural applications
Yield Strength	≥ 550 MPa	Minimum yield strength per EN 10346 / GB/T 12754
Elongation	≥ 6% (A80)	Measured over 80 mm gauge length per EN ISO 6892-1
Surface Hardness	HRB 85–95 / HV 180–220	Enhanced pencil hardness ≥ 2H for coating; substrate Rockwell B scale
Dimensions	Thickness: 0.3–3.0 mm; Width: 600–1500 mm; Length: Coil or 1000–6000 mm	Custom slit and cut-to-length available upon request
Surface Finish	PVDF / PE / HDP Coating, 10–35 μm	Polyester or PVDF top coat; epoxy or polyester primer; zinc or galvalume base
Color Options	RAL standard colors available	Custom colors per RAL chart; matte, gloss, or textured finish
Application	Roofing, wall cladding, sandwich panels, appliances, automotive parts	Suitable for construction, industrial buildings, and home appliance manufacturing
Certification	ISO 9001, SGS, BV, CE	Third-party inspection and mill test certificate (MTC) available
Packaging	Eye-to-sky or eye-to-wall coil; wooden pallet for sheets	Waterproof paper + steel strip bundling; export seaworthy packaging
MOQ	5 Metric Tons per specification	Mixed specifications accepted; spot stock available for standard sizes

High Hardness Color Steel Sheet - Mill Direct Supplier

High hardness color steel sheet serves as a cornerstone material across modern construction, industrial manufacturing, and architectural cladding sectors where both structural rigidity and aesthetic appeal are non-negotiable. Engineered to deliver a Rockwell hardness rating of up to HRB 85 combined with a vibrant, durable polymer coating, this product outperforms conventional prepainted panels in environments subject to mechanical abrasion, heavy foot traffic, and prolonged UV exposure. Our mill-direct supply chain eliminates intermediary markups, enabling buyers to access premium-grade stock at cost-effective rates without compromising on dimensional precision or surface uniformity. Whether you are sourcing material for roofing systems, wall panel assemblies, clean-room partitions, or appliance housings, our high hardness color steel sheet delivers consistent performance across every application. With production capacities exceeding 50,000 metric tons annually and compliance with GB/T 12754, EN 10169, and ASTM A755 standards, we are positioned as a trusted long-term partner for contractors, fabricators, and OEM manufacturers worldwide seeking reliable, specification-compliant prepainted steel solutions.

What is High Hardness Color Steel Sheet?

High hardness color steel sheet is a cold-rolled or hot-dip galvanized steel substrate with an enhanced base metal hardness—typically achieving yield strength between 280 MPa and 550 MPa—onto which multiple layers of organic coating are applied through a continuous coil-coating process. The result is a structurally robust, corrosion-resistant panel available in a broad spectrum of RAL colors, combining load-bearing capability with outstanding surface aesthetics for both interior and exterior applications.

High Hardness Color Steel Sheet Manufacturing Process

Production begins with high-strength cold-rolled or galvanized coil substrates sourced from certified blast furnaces. Coils undergo continuous pickling, alkaline degreasing, and chromate-free passivation pretreatment to maximize coating adhesion. A primer layer of 5–8 µm is applied electrostatically, followed by a topcoat of 15–25 µm polyester, PVDF, or HDP resin cured in precision-controlled ovens at 230°C–260°C. Final inspection includes T-bend flexibility testing, pencil hardness verification at 2H minimum, and 500-hour salt spray resistance confirmation per ISO 9227.

High Hardness Color Steel Sheet Technical Specifications

Our high hardness color steel sheet is available in the following verified parameters to support accurate engineering design and procurement planning:

Base Metal Yield Strength: 280–550 MPa (S280GD to S550GD per EN 10346)
Rockwell Hardness: HRB 70–85 depending on grade selection
Total Coating Thickness: 20–35 µm (primer + topcoat combined)
Substrate Zinc Coating Mass: Z100–Z275 g/m² (hot-dip galvanized)
Sheet Width: 600–1,500 mm with ±1 mm tolerance
Sheet Thickness: 0.30–1.50 mm with ±0.02 mm tolerance
Salt Spray Resistance: ≥500 hours per ISO 9227
Gloss Level: Matte (10–20 GU) to high gloss (60–80 GU) at 60° angle
Color Options: Full RAL Classic and RAL Design System palette; custom color matching available
Compliance Standards: GB/T 12754, ASTM A755, EN 10169, JIS G 3312

Get a Competitive Quote for High Hardness Color Steel Sheet

Partner with our mill-direct team to secure the most cost-effective pricing on high hardness color steel sheet for your next project. We provide tailored quotations based on volume, specification, and delivery schedule, ensuring you receive maximum value without delays. Reach out now and receive your detailed proposal within 24 hours.

High hardness color steel sheet supplier

24/7 customer support available
Free samples for quality evaluation
Competitive pricing for bulk orders
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High hardness color steel sheet manufacturer

High hardness color steel sheet wholesale

Ratings & Reviews

4.5

Based on 8 reviews

5 5

4 2

3 1

2 0

1 0

Arjun M.

India

2025-02-05

Initial shipment had width tolerance issue — resolved professionally

First order of 40 tons, 0.45 mm S350GD at 1,200 mm width. On arrival, roughly 15% of coils measured 1,202–1,204 mm — outside the stated ±1 mm tolerance — which caused fitment issues on our roll-forming line. Raised the issue with technical support; they responded within 24 hours, arranged a third-party re-inspection, and provided replacement coils plus a logistics credit within two weeks. Subsequent delivery was fully within spec. Appreciated the transparent handling. Cautiously optimistic for future orders pending consistent quality.

Rachel B.

United Kingdom

2025-02-27

Competitive bulk pricing, documentation could be faster

Ordered 95 tons of 0.60 mm HDP-coated sheets, Z150 zinc, for warehouse wall cladding. Material quality was solid — hardness consistent at HRB 78–80, and the matte finish (14 GU) matched our architectural spec. Pricing beat three competing quotes on equivalent EN 10346 S350GD grade. The only friction point was that full mill certificates took four business days to arrive after shipment confirmation; we needed them sooner for our client's approval process. Supplier noted this and improved turnaround on our follow-up order. Reliable overall.

Daniel F.

United States

2025-03-21

Good value for S280GD grade — minor color variance on first batch

Purchased 60 tons of 0.35 mm S280GD for appliance housing panels in RAL 9016. Mechanical specs were spot-on and ASTM A755 paperwork was clean. Pricing was noticeably lower than our previous domestic supplier for equivalent specification. Minor issue: one coil lot had a slight gloss variation (measured 58 GU vs. 62 GU target). Supplier acknowledged it quickly and issued a partial credit. Would have been 5 stars without that. Overall strong value proposition for high-volume, cost-sensitive applications.

Know your supplier

Xinpeng Color Coating Co., Ltd.

2 yrs on Sinoali.com

Located in China

Company information More goods

Company Profile

Xinpeng Color Coating Co., Ltd. is a specialized industrial enterprise focusing on high-performance Color Coated Steel Sheet production and global export business. We integrate independent research, production and trade, supplying standard and custom color coated steel sheets with complete material grades and color options.

Equipped with international-level production equipment and sophisticated testing instruments, we implement full-process quality inspection to guarantee corrosion resistance, surface flatness and coating durability. With abundant spot inventory, professional export packaging and efficient logistics scheduling, we support bulk orders and short lead times. Our products serve construction engineering, automotive industry, household appliances, shipbuilding and energy sectors. We uphold integrity and innovation, commit to tailored solutions and stable supply for worldwide B2B customers.