Can High Tensile Plates Be Welded and Cut?

Understanding High Tensile Plates in Modern Fabrication

High tensile steel plates are engineered for exceptional strength, reduced thickness, and lightweight structural integrity. These plates, including grades like E350, S355J2, S690QL, and NAXTRA 70, are designed for use in bridges, automotive parts, pressure vessels, cranes, trailers, and heavy machinery.

A common question from engineers and buyers:
Can these plates be safely cut and welded without losing their strength?
Answer: YES – but with specific process control.

Are High Tensile Plates Weldable?

Yes. High tensile plates can be welded with excellent results – provided preheat, interpass temperature, and low-hydrogen welding consumables are used. Welding parameters depend on:

• Plate thickness
• Base grade (e.g., E350 vs S690QL)
• Toughness requirement (e.g., -20°C impact tested)

Is Cutting High Strength Plates Possible?

Absolutely. High tensile plates can be plasma cut, oxy-fuel cut, laser cut, and even CNC waterjet cut. Each method has application-specific pros and cons based on:

Mechanical Property Impact During Cutting or Welding

Improper welding or thermal cutting may lead to:

• Heat-Affected Zones (HAZ) with reduced toughness
• Cracking or loss of yield near weld seams
• Residual stress

But with the right WPS (Welding Procedure Specification), this can be eliminated.

Welding Techniques for High Tensile Grades

Common methods used:

Welding Process	Suitability
SMAW (Stick)	Great for site fabrication
GMAW (MIG/MAG)	Fast and clean welding
SAW (Submerged Arc)	Ideal for thick plates and beams
TIG	For precision welds in thinner plates

Recommended electrodes: E7018 / E11018-G, depending on tensile strength required.

Cutting Methods for Quenched & Tempered Steel Plates

Method	Thickness Range	Notes
Plasma Cutting	3–50 mm	Clean edges, faster, cost-efficient
Oxy-Fuel	10–150 mm	Suitable for thicker plates
Waterjet	2–80 mm	No heat, high precision
Laser	Up to 20 mm	Tight tolerances, for thin sections

HSC offers all these services in-house.

Preheat, Interpass, and PWHT – When Needed?

Plate Grade	Preheat Temp (°C)	Notes
E350 / S355	Optional	If >20 mm or in cold condition
S690QL / NAXTRA	100–150°C	Mandatory preheat before welding
E450C / JFE 780	80–120°C	Check mill WPS recommendation

Post Weld Heat Treatment (PWHT) is generally not required, except in pressure vessel or critical load-bearing zones.

Challenges Faced in Welding High Strength Steel

Without proper care, challenges may include:

• Hydrogen-induced cracking
• Loss of impact toughness in HAZ
• Plate warping due to high heat input

Solutions: Use preheat, interpass control, low-hydrogen rods, and stress-relief weld sequencing.

Why Choose HSC for Cut + Welded Plate Supply?

Hindustan Steel Corporation delivers:

• Cut-to-size high tensile plates
• Bevelled edge preparation
• Pre-welded assemblies
• Shot blasted + primer coated plates
• CNC nesting and bending services

We are equipped to handle E350 to S690QL grades with customized fabrication.

Export-Ready Plate Profiles with Cut & Welded Supply

We export cut + welded steel structures and ready-to-fabricate plates to:

• UAE, Saudi Arabia, Oman, Egypt, Kenya, South Africa
• Europe and Southeast Asia
• Certified packing: seaworthy wrap + steel pallet

Buyer Tip: Ensure Quality Welding with These Checks

Before accepting welded high tensile plates:

• Ask for Welding Procedure Qualification Record (WPQR)
• Demand UT / Radiographic Testing if applicable
• Check heat input logs and edge hardness test if needed
• Always request MTC + WPS copy

Buyer Guide: How to Ensure You’re Getting 350 MPa Yield?

• Always ask for Mill Test Certificate (MTC) showing yield value
• Request E350B0 or E350C for tested impact performance
• Use only from BIS-approved or PED-certified mills for quality compliance

Certifications We Provide with Fabricated Plates

• IS 2062, EN 10025-6, ASTM A572, A517 compliance
• EN 10204 3.1 / 3.2 Test Certificate
• NABL lab reports (on request)
• IBR, CE, PED compliant (export)

Looking for High Tensile Plates with CNC Cutting or Welding?

We offer:

Mill-direct plates
In-house profile cutting
Ready-to-weld kits
Nationwide & international supply

Call us or drop an RFQ for thickness, cut sizes, or welding details.

15 SEO-AEO-LEO FAQs – Welding & Cutting High Tensile Plates