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NAXTRA 70 High Strength Steel Plates – Quenched & Tempered Grade Supplier in India

Looking for a reliable supplier of NAXTRA 70 quenched and tempered steel plates in India? Hindustan Steel Corporation delivers precision-engineered plates for structural, automotive, and heavy-duty engineering projects — ready in cut-to-size form with mill test reports and rapid export support.

Designed for superior tensile performance and weldability, NAXTRA 70 plates are widely used in crane manufacturing, load-bearing frames, and yellow goods — where strength, weight reduction, and fatigue resistance are critical.

Available in widths up to 3000mm and thickness from 6mm to 150mm
EN 10025-6 compliant – German-make & equivalent grades in stock
High notch toughness, bendability & excellent weld performance

Table of Contents

What is NAXTRA 70 Plate and Why Is It Used?

NAXTRA 70 is a high-strength low-alloy (HSLA) steel that undergoes quenching and tempering (Q&T) to achieve its mechanical properties. Produced by Dillinger Hütte or equivalent European mills, this grade delivers a minimum yield strength of 690 MPa and combines:

  • High structural performance
  • Reduced dead weight in machinery
  • Superior workability during fabrication
  • Fatigue resistance under dynamic loads

These features make NAXTRA 70 ideal for construction equipment, lifting beams, truck chassis, and crane booms.

Applications Across Industries That Trust NAXTRA 70 Plates

Due to its consistent yield-to-tensile ratio, excellent elongation percentage, and tight thickness tolerances, NAXTRA 70 is commonly used in:

  • Infrastructure projects: bridge sections, steel towers
  • Heavy automotive: tipper bodies, chassis, truck trailers
  • Cranes & lifting machinery: telescopic arms, outriggers
  • Earthmoving equipment: bulldozers, buckets, rippers
  • Hydraulic platforms: stabilizers, support frames
  • Global EPC projects: structural frame assembly, wind tower sections

NAXTRA 70 Mechanical Properties – Yield, Tensile & Impact Strength

Property Typical Value
Yield Strength (Min) 690 MPa
Tensile Strength 770–940 MPa
Elongation (L0 = 5.65√S0) ≥ 14%
Impact Test (Charpy V) ≥ 40J at -40°C (for thickness <50mm)
Brinell Hardness (HB) 250–290 HBW (typical)
  • Excellent performance even in sub-zero temperatures
  • Impact-tested plates available for offshore and arctic use

Technical Standards, Grade Codes & Global Equivalents

NAXTRA 70 is typically produced in accordance with EN 10025-6 standards and matches several international equivalents. The plates adhere to tight mechanical tolerances and undergo stringent mill testing.
Common equivalents include:

Standard Equivalent Grade
EN 10025-6 S690QL
DIN NAXTRA 70 (original mill)
AFNOR E690T
ASTM A514 Grade Q (approx.)

Mill supplies available with EN 10204 3.1 / 3.2, CE marking, and ultrasonic tested options (UT EN 10160).

Thickness Range & Plate Dimensions Supplied

At Hindustan Steel Corporation, we stock cut-to-size NAXTRA 70 steel plates with the following dimensional capabilities:

  1. Thickness: 6 mm to 150 mm
  2. Width: Up to 3000mm
  3. Length: Custom up to 12000mm
  4. Surface Finish: Mill, Shot Blasted & Primer Coated

Large-width plates are ideal for beams, long weldments, and chassis frames where deflection resistance is key.

Quenching & Tempering Treatment of NAXTRA 70

NAXTRA 70 plates are manufactured via a two-stage heat treatment process:

  1. Quenching: Rapid cooling to refine grain structure and increase hardness
  2. Tempering: Controlled reheating to enhance ductility and reduce internal stresses

The result? A balanced microstructure that delivers high strength without sacrificing formability or toughness.

This treatment enables use in dynamic loading conditions, offshore structures, and heavy wear applications.

Welding, Cutting & Fabrication Tips

Despite its high tensile nature, NAXTRA 70 is fabrication-friendly, provided basic precautions are followed:

  • Welding:
    Preheating is recommended above 30mm thickness. Use low-hydrogen electrodes and maintain interpass temperatures.
    Suggested filler wires: E7018, E11018-G
  • Cutting:
    Plasma and oxyfuel methods both supported. Use optimized preheat for edge stability.
  • Bending/Forming:
    Plates <40mm can be cold formed easily. Large-radius tools recommended for thick sections.

Need help with fabrication planning? Our team supports OEMs and fabricators with weldability data and process charts.

Why Buy NAXTRA 70 Plates from Hindustan Steel Corporation

Here’s what makes us the preferred supplier of NAXTRA 70 in India and overseas:

  • Ready Stock in Mumbai & Nhava Sheva
  • Custom Sizes & Short Lead Times
  • Mill Certifications + MTC / CE Marking\
  • WPS + Welding Guidelines Shared on Request
  • Global Export Packaging & Logistics Support

Whether you’re a government project buyer or a private equipment builder — we offer end-to-end material assurance.

Related Grades – S690QL / NAXTRA 700 / Dillimax 690T

Alongside NAXTRA 70, Hindustan Steel also stocks and supplies:

  • S690QL Steel Plates – EN 10025-6 compliant
  • NAXTRA 700 – Variant with tighter tensile tolerance
  • Dillimax 690T – German-origin ultra-high strength plate
  • SAILMA 550 / 650 – Indian high tensile options

These grades are offered with comparative datasheets to help engineers make informed material decisions.

Export Destinations, Packaging & Shipping Methods

Hindustan Steel Corporation exports NAXTRA 70 plates to over 30+ countries with mill-traceable certifications and export-ready packaging.

Popular Export Destinations:

  • Saudi Arabia – Industrial EPC & rig structures
  • UAE – Skid frames, crane chassis, platforms
  • South Africa – Mining buckets, support equipment
  • Vietnam – Fabrication and steel service centres
  • Indonesia – Port & marine equipment
  • Singapore, Malaysia, Thailand – Shipbuilding & civil

Packaging Options:

  • Sea-worthy pallets or loose bundles
  • Edge-protected wrapping with rust inhibitor
  • MTC copy enclosed in waterproof pouch
  • Full export documentation: COO, Bill of Lading, Insurance, Commercial Invoice

Buyer’s Guide – How to Choose Right NAXTRA Grade?

Here’s how buyers can ensure the correct NAXTRA grade is selected for their needs:

Requirement NAXTRA Plate Choice
High weldability + toughness NAXTRA 70 (standard)
Better elongation + forming NAXTRA 700 (low temp use)
Weight reduction, high payload Combine NAXTRA 70 with 550 or 650 variants
German-origin quality preference Dillimax 690T or NAXTRA Xabo

Tip: Always check impact testing requirements (CVN @ -20°C / -40°C) for offshore and mobile equipment projects.

Need help? Our technical desk can advise within 24 hours with comparative grade charts.

Certifications, Approvals & Mill Test Reports (MTC)

Every NAXTRA 70 plate from Hindustan Steel is supplied with:

  • EN 10204 3.1 / 3.2 MTC
  • CE Marking for EU compliance
  • ISO 9001, ISO 14001, OHSAS 18001
  • Ultrasonic Testing (UT) – EN 10160 compliant
  • Optional: NDT, Third-Party Inspection (TÜV, Lloyds, SGS)

Documentation ready for tender submission, fabrication release, and government EPC approvals.

SEO-AEO-Voice Search FAQs (15 Total)

Yes, NAXTRA 70 meets similar mechanical properties as S690QL under EN 10025-6.

Tensile strength ranges from 750–950 MPa, depending on thickness.

Yes, it has good weldability with low hydrogen electrodes and standard preheat procedures.

Yes, Hindustan Steel Corporation stocks and supplies NAXTRA 70 plates across India and for export.

No, it is supplied in quenched and tempered condition—ready to use.

EN 10204 3.1 / 3.2 MTC, CE Marking, and ISO certifications.

Yes, we offer CNC cutting and cut-to-length service as per drawings.

Yes, it offers good impact resistance and weldability, suitable for harsh conditions

NAXTRA 70 offers better toughness and European spec compliance.

We accept orders as low as 1 plate or per project lot.

Yes, NAXTRA 700 is a variant with slightly tighter tensile range and better elongation.

Absolutely. We provide full datasheet + WPS recommendations on request.

UAE, Saudi Arabia, South Africa, Indonesia, Vietnam, and more.

Fast delivery, ready stock, technical support, and mill traceability — all under one roof.

Get Instant Quote, Mill Datasheet & Availability

Need current price of NAXTRA 70? Or want to check stock availability in 10mm, 25mm, or 80mm?

Email us: sales@hindustansteelcorp.com
WhatsApp Chat for mill offer + shipping quote
Datasheet PDF available on request
MOQ: 1 plate (cut-to-size supply also supported)

We dispatch within 48 hours across India and offer door delivery to fabrication yards across UAE, Saudi, and Vietnam.

Call Now

+91-22-66159018
+91-9820944724

Email

sales@hindustansteel.com hindustansteel1@gmail.com

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390/392, Ground Floor, Shankar Mansion, S.V.P. Road, Mumbai – 400004, India

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+91-22-66159018
+91-9820944724

Email

sales@hindustansteel.com hindustansteel1@gmail.com