Steel plate for heavy machinery manufacturers
Permanent stock, cut to size and guaranteed supply. S355 for structures, 450 HB for wear-resistant components, S690QL for weight reduction. Deliveries throughout Spain and Portugal.
What does a heavy machinery manufacturer need?
Five real needs we solve with stock, technical advice and supply capacity.
Precise cutting tolerances
Frame and chassis parts must fit without gaps. Cut to size with ISO 9013 class 2 tolerances, reducing fitting work in your workshop.
Mechanical consistency
In runs of 50-100 units, variability between heats causes rejections. EN 10204 3.1 certificate with full traceability guaranteed.
Guaranteed weldability
Frames require joints that withstand fatigue. Our S355J2+N and S690QL grades come with controlled CEV for weld cracking-free welding.
Abrasion resistance
Hoppers and buckets suffer severe wear. 450 HB wear-resistant plate with certified Brinell hardness to extend service life.
Lead times that don't stop production
An assembly line cannot wait 12 weeks. Stock in Spain and Portugal means deliveries in days, not months.
Unlimited volume
From a single plate to full truckloads. Capacity for recurring monthly orders and serial production contracts.
Mayor Steel products for heavy machinery
Technical plate from stock with specific application in the heavy machinery and construction equipment sector.
S355J2+N structural plate
Application: Main crane frames, telescopic handler chassis, elevating platforms, support structures for lifting equipment.
Technical advantage: Optimal balance between mechanical strength, weldability and cost. The J2 grade guarantees 27J impact resistance at -20°C for equipment in cold climates.
Heavy structural plate ≥ 60 mm
Application: Counterweight supports, fixed machinery anchor bases, hydraulic arm articulation shafts, components with concentrated loads.
Technical advantage: Controlled segregation and grain homogeneity in heavier thicknesses. Guaranteed structural-grade steel up to 250 mm.
HB 450 wear-resistant plate
Application: Loader hoppers, excavator buckets, side armor for earthmoving equipment, wear plates on mobile crushers.
Technical advantage: 450 HB Brinell hardness that multiplies service life by 3-6 compared to S355 in impact and sliding abrasion applications.
S690QL high-strength plate
Application: Mobile crane arms where weight limits load capacity, high-rise elevating platforms, components where weight reduction is critical.
Technical advantage: Enables lighter sections (up to -35% weight) while maintaining load capacity, improving energy efficiency and mobility.
Why Mayor Steel is the ideal supplier for your factory
Four differentiating value points for manufacturers who need regular, reliable supply.
⚡ Stock in Spain and Portugal = Lead times in days
Your production line can't depend on a ship in transit. We keep physical stock in Spain of S355, 450 HB and S690QL. Fast deliveries across the peninsula.
👨🔧 Direct technical advice, no middlemen
You talk to a technician who knows the difference between S355JR and S355J2, knows when to recommend 450 HB, and can calculate the CEV to avoid weld cracking.
📦 Capacity for high-volume orders
Manufacturing heavy machinery requires tons, not kilos. We handle orders from a single plate to full truckloads, with monthly recurring supply capacity for serial production.
📋 Guaranteed traceability and certification
Every supply includes an EN 10204 3.1 certificate with heat number, chemical composition and mechanical properties. If your OEM customer requires full traceability, we have it documented from the rolling mill.
Applications in heavy machinery
Twelve real applications of our plate in the heavy machinery and construction equipment sector.
Telescopic crane frames
S355J2+N, 10-25 mm
Handler arms
S690QL, weight reduction
Loader hoppers
450 HB, 8-20 mm
Elevating platforms
S355 + S690QL
Excavator buckets
450 HB, wear zones
Machinery armor
S355
Hydraulic supports
Heavy S355, 40-80 mm
Crane counterweights
S355, 60-150 mm
Dumper chassis
Weldable S355J2+N
Anchor bases
S355, 80-150 mm
Hydraulic tanks
P265GH/P355GH, PED
Crusher wear plates
450 HB, 10-30 mm
Related sectors that also work with us
Structural metalwork
Mining and aggregates
Agriculture
Industrial handling
Rail sector
Request a quote for your heavy machinery factory
Tell us what grade, thickness and quantity you need. We'll try to get back to you within 24 hours with price and availability from stock. No commitment, no surprises.
Frequently asked questions from heavy machinery manufacturers
Concrete answers to the real questions of purchasing managers and technical directors.
Yes. All our structural steel is supplied with an EN 10204 3.1 certificate including heat chemical composition, mechanical properties and conformity with the EN 10025 standard. If your OEM customer requires full traceability, we document it from the rolling mill.
Yes. We have S355J2+N in thicknesses up to 150 mm from stock, and up to 250 mm with scheduled delivery. For thicknesses over 80 mm, we recommend checking the CEV (carbon equivalent value) to optimize the welding procedure for your frames.
Yes. We cut to the required length while keeping the width. No flame cutting or shape-cutting services.
Absolutely. We design supply agreements with guaranteed monthly or quarterly volume, fixed pricing for the contract period and scheduled deliveries according to your production plan. We're talking tons, not kilos.
Mayor Steel maintains permanent stock of steel plate in Spain and Portugal, allowing us to offer competitive delivery times to heavy machinery manufacturers throughout the peninsula. From our warehouse in the Basque Country, we cover the northern industrial corridor (Basque Country, Cantabria, Asturias) with daily deliveries, and the rest of Spain, France, Portugal and Morocco via consolidated national transport. No customs, no port delays, no surprises in international transport.