Higher Strength. Lower Weight. Engineered Performance.
HSLA plates provide significantly higher yield and tensile strength compared to standard carbon steel. By reducing the weight of structures while maintaining load-bearing capacity, HSLA plates are the material of choice for offshore platforms, jack-up rigs, and heavy lifting equipment in the oil and gas sector.
Available Standards & Grades
Standard Grades Minimum Yield Strength
ASTM A572 Grade 42, 50, 55, 60, 65 290 – 450 MPa
ASTM A709 Grade 36, 50, 50W, HPS 50W, HPS 70W, HPS 100W 250 – 690 MPa
EN 10025-3 S275N/NL, S355N/NL, S420N/NL, S460N/NL 275 – 460 MPa (Normalized)
EN 10025-4 S275M/ML, S355M/ML, S420M/ML, S460M/ML 275 – 460 MPa (TMCP)
EN 10025-6 S460Q/QL/QL1, S500Q, S550Q, S620Q, S690Q/QL/QL1 460 – 690 MPa (Q&T)
API 2W Grade 50, Grade 60 345 – 414 MPa
Dimensional Range
Parameter Range
Thickness 3mm to 200mm (Q&T grades typically up to 150mm)
Width 1500mm to 4500mm
Length Up to 18000mm
Condition Normalized, TMCP, Quenched & Tempered
Typical Applications in Oil & Gas
· Offshore platform topsides, jacket structures, and leg nodes
· Jack-up rig legs, chords, and spud cans
· Crane pedestals, A-frames, and heavy lifting equipment
· High-pressure piping and manifold skids
· Subsea templates and manifolds
· Blast-resistant modules and accommodation units
Key Properties
Property Benefit
High Yield Strength Enables lighter structures, reducing foundation and lifting costs
Good Weldability Low carbon equivalent values (CEV) reduce preheat requirements
Low-Temperature Toughness M/ML and Q/QL grades tested to -20°C, -40°C, -50°C, -60°C
Through-Thickness Z15, Z25, Z35 available for node and tubular joint applications