HSLA Steel Plates - ASTM Certified Mill Direct Supplier

Zhonghe Building Materials Co., Ltd.

Verified Custom manufacturer · 3 yrs ·

China

high strength low alloy steel plates (HSLA)

Customizable Rock-bottom price

$720 1-49 ton Base price

$688 50-99 ton 4.4% off

$673 ≥100 ton 6.5% 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$ 720.00

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 Strength Low Alloy Steel Plates (HSLA)

Property	Parameter	Description
Product Name	High Strength Low Alloy Steel Plates (HSLA)	Structural steel plates with enhanced mechanical properties through micro-alloying elements
Material Grade	ASTM A572 Gr.50/60/65, A588, A656; EN S355ML, S420ML, S460ML; GB Q355B/C/D, Q420C	International equivalent grades available; micro-alloyed with Nb, V, Ti for grain refinement
Standard Compliance	ASTM A572, ASTM A588, ASTM A656, EN 10025-4, EN 10149-2, GB/T 1591, JIS G3106 SM570	Compliant with major international structural and pressure vessel standards
Chemical Composition – Carbon (C)	≤ 0.23% max	Low carbon content ensures good weldability and toughness
Chemical Composition – Manganese (Mn)	0.80% – 1.65%	Primary strengthening element; improves hardenability
Chemical Composition – Silicon (Si)	≤ 0.45% max	Deoxidizer; contributes to strength and corrosion resistance
Chemical Composition – Phosphorus (P) / Sulfur (S)	P ≤ 0.035%, S ≤ 0.035%	Controlled to minimize brittleness and hot cracking
Chemical Composition – Micro-alloys (Nb/V/Ti)	Nb ≤ 0.05%, V ≤ 0.15%, Ti ≤ 0.05%	Grain-refining and precipitation-hardening elements for high strength
Tensile Strength	450 – 760 MPa (65 – 110 ksi)	Per ASTM A572 Gr.50: 450 MPa min; Gr.65: 550 MPa min; EN S460ML: 540–720 MPa
Yield Strength	345 – 550 MPa (50 – 80 ksi)	Per ASTM A572 Gr.50: 345 MPa min; Gr.65: 450 MPa min; EN S460ML: 460 MPa min (t ≤ 16 mm)
Elongation	17% – 23% (in 200 mm gauge length)	ASTM A572 Gr.50: ≥ 21%; EN S355ML: ≥ 20%; higher elongation grades available for forming
Impact Toughness	27 J min at –20°C to –50°C (Charpy V-notch)	EN 10025-4 ML grades guarantee low-temperature toughness; suitable for cold-climate structures
Plate Dimensions	Thickness: 3 – 150 mm; Width: 1000 – 4500 mm; Length: 3000 – 18000 mm	Custom cutting available; tolerance per EN 10029 Class B or ASTM A6/A6M
Surface Finish	Hot-rolled (HR), Normalized (N), Thermo-Mechanically Controlled Process (TMCP)	Shot-blasted to Sa 2.5 available on request; mill scale or primer-coated options
Application	Bridges, offshore platforms, construction machinery, pressure vessels, shipbuilding, wind towers	Ideal where weight reduction and high strength-to-weight ratio are critical
Certification	Mill Test Certificate (EN 10204 3.1/3.2), ABS, BV, DNV, Lloyd's, CE Marking	Third-party inspection by SGS, TÜV, or Bureau Veritas available upon request
Packaging	Bundled with steel strapping; wooden dunnage; seaworthy export packing	Rust-preventive oil coating or VCI film wrapping for overseas shipment
MOQ	5 metric tons per grade/size	Stock plates available for immediate delivery; custom rolling lead time 15–30 days

HSLA Steel Plates - ASTM Certified Mill Direct Supplier

High strength low alloy steel plates (HSLA) represent one of the most strategically engineered material categories in modern industrial manufacturing, delivering a superior balance of mechanical performance and cost efficiency that conventional carbon steels simply cannot match. Engineered with precisely controlled additions of microalloying elements — including niobium, vanadium, titanium, and copper — HSLA steel plates achieve yield strengths typically ranging from 275 MPa to 690 MPa while maintaining a relatively lean chemical composition. This makes them indispensable across demanding sectors such as structural construction, heavy equipment fabrication, shipbuilding, pipeline infrastructure, and automotive frame manufacturing. As an ASTM-certified mill-direct supplier, we source and distribute high strength low alloy steel plates that conform rigorously to internationally recognized standards, ensuring every plate that leaves our facility meets the dimensional tolerances, mechanical properties, and surface quality your project demands. Whether you require standard stock dimensions or custom-cut profiles, our supply chain is built for responsiveness and reliability.

high strength low alloy steel plates supplier

What Are High Strength Low Alloy Steel Plates (HSLA)?

High strength low alloy steel plates (HSLA) are a specialized category of structural steel engineered to provide enhanced mechanical properties — including elevated yield strength, improved toughness, and outstanding weldability — through the addition of small quantities of alloying elements, typically totaling less than 2% by weight. Unlike conventional high-alloy steels, HSLA grades achieve their performance characteristics primarily through microstructural refinement rather than large alloy additions, resulting in a material that is both structurally superior and more economical to produce and process. Common ASTM grades include A572, A588, A514, and A656, each tailored for specific load-bearing and environmental requirements.

High Strength Low Alloy Steel Plates Technical Specifications

Our HSLA steel plates are stocked and supplied across a broad specification range to serve diverse engineering applications. Below are representative technical parameters for our most requested grades:

HSLA steel plates manufacturer

Parameter	ASTM A572 Grade 50	ASTM A588 Grade A	ASTM A514 Grade B
Yield Strength (Min.)	345 MPa (50 ksi)	345 MPa (50 ksi)	690 MPa (100 ksi)
Tensile Strength	450–620 MPa	485–620 MPa	760–895 MPa
Elongation (Min.)	21% in 200 mm	21% in 200 mm	18% in 50 mm
Carbon Content (Max.)	0.23%	0.19%	0.21%
Density	7.85 g/cm³	7.85 g/cm³	7.85 g/cm³
Thickness Range	6 mm – 100 mm	6 mm – 100 mm	6 mm – 150 mm
Width Range	Up to 3,000 mm	Up to 3,000 mm	Up to 3,000 mm
Surface Condition	Hot-rolled / Normalized	Hot-rolled / Weathering	Quenched & Tempered

All HSLA steel plates are supplied with full mill test reports (MTR), third-party inspection options, and compliance documentation per ASTM, EN, and GB standards. Custom heat treatment, ultrasonic testing (UT), and edge preparation services are available upon request.

Get a Competitive Quote for HSLA Steel Plates

Our mill-direct procurement model eliminates intermediary markups, allowing us to offer cost-effective rates on high strength low alloy steel plates for projects of any scale. Submit your specifications today and receive a detailed, no-obligation quotation within 24 hours — backed by verified material certifications and dedicated technical support.

high strength low alloy steel plates China exporter

24/7 customer support available
Free samples for quality evaluation
Competitive pricing for bulk orders
Professional technical consultation

Contact us today to get your free quote within 24 hours!

Ratings & Reviews

4.5

Based on 8 reviews

5 5

4 2

3 1

2 0

1 0

Charlotte B.

United Kingdom

2025-02-01

Initial documentation gap on EN equivalent certs — resolved satisfactorily

Our first order of 15 tons of ASTM A572 Grade 50, 30 mm thick, for rail infrastructure support structures hit a snag when the initial shipment lacked the EN 10025-2 S355 equivalent certification our project engineer required for UK regulatory submission. We flagged this within 24 hours of receiving documents. The supplier issued the correct dual-standard certification within two business days, and the material itself — tensile strength 468 MPa, elongation 21.5% — was fully compliant. Issue was resolved without impact to our project timeline. Recommend clarifying documentation requirements upfront.

Aisha K.

UAE

2025-02-22

Competitive pricing on A514 Grade B, delivery timeline slightly longer than quoted

We sourced 18 tons of ASTM A514 Grade B, 80 mm thick, for crane boom fabrication requiring 690 MPa yield strength. Material quality was excellent — quenched and tempered surface was uniform, and all hardness readings fell within the Brinell 235–293 range we specified. The quoted lead time was 12 days; actual delivery to Jebel Ali port was 16 days due to a vessel schedule change. The team communicated the delay proactively, which we appreciated. Price per ton was around 8% below our previous supplier for this grade. Would use again.

James F.

Australia

2025-03-16

Good value on A572 Grade 50 bulk order — minor packaging feedback noted

Purchased 25 tons of ASTM A572 Grade 50, 16 mm thick, for reinforced retaining wall construction. Mechanical properties on the MTR were fully compliant, and elongation at 22% exceeded the 21% minimum. Pricing per ton was noticeably lower than local distributors for this volume. One point worth noting: two plates arrived with minor surface rust from transit — not structurally significant, but required extra prep time on site. The supplier responded quickly and offered a credit. Overall a strong value proposition; will order again with updated packaging instructions.

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Zhonghe Building Materials Co., Ltd.

3 yrs on Sinoali.com

Located in China

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Zhonghe Building Materials Co., Ltd. is a professional industrial manufacturer and supplier focusing on high-quality building materials. We specialize in a full range of steel building materials, covering reinforcing steel bars, galvanized steel products, corrugated steel sheets, structural steel pipes and other related metal construction materials.

Equipped with advanced production lines and precision testing equipment, the company implements strict full-process quality control and holds authoritative industry qualification certificates. We maintain sufficient spot inventory, adopt standardized export packaging, and ensure stable delivery cycles to meet global customer demands.

Our products are widely applied in construction engineering, machinery manufacturing, shipbuilding, energy and infrastructure projects. Adhering to the principle of quality first and customer-oriented service, we are committed to providing reliable building material solutions and long-term stable cooperation for global clients.