AH36 | HSLA Steel | Shipbuilding Steel
AH36 | HSLA Steel | Shipbuilding Steel
AH36 is a high-strength shipbuilding steel used worldwide. It meets the ASTM A131/A131M standard. The “A” stands for the shipbuilding grade, “H” indicates high strength, and “36” represents the minimum yield strength of 36,000 psi. Equivalent grades include ABS AH36 and LR AH36. AH36 has excellent toughness, good weldability, and high strength. It is commonly used in shipbuilding, offshore structures, and marine engineering.
We are professional AH36 suppliers with 500,000+ tons annual capacity, guaranteeing stable supply.
Description
What Is AH36?
AH36 is a type of high-strength structural steel primarily used in shipbuilding. It is composed of 98% iron and 2% carbon and manganese. AH36 is typically supplied as flat plates or sections and is solid with a standard steel color. This steel is known for its high strength, toughness, and good weldability, which makes it suitable for the harsh conditions at sea. AH36 is predominantly used in the construction of ship hulls and offshore structures. It is processed through hot rolling, ensuring its strength and durability. AH36 can be further classified under the ASTM A131/A131M standard for structural steels in marine applications.Characteristics of AH36
AH36 steel is strong, tough, and weldable. It resists harsh marine conditions well. Its high tensile strength makes it ideal for shipbuilding. This steel is also durable and reliable for offshore structures. Alternative steel grades like DH36, EH36, and FH36 can offer higher strength or toughness. AH36 is mainly used in ship hulls, offshore platforms, and marine structures.AH36 Steel Manufacturer
SteelPro Group provides AH36 steel that meets the strength requirements for critical structural areas such as keels and bottom plates in heavy-duty vessels. We provide AH36 plates, profiles, and bars, available in thicknesses ranging from 6 mm to 120 mm and widths up to 4,000 mm. We can also supply with mill-scale finish or optional shot blasting, primer coating, and more custom options for extended corrosion protection.-
- Classifier: ABS, LR, CCS, KR, NK
- Standard: ASTM A131, EN 10025
- Certificate: EN 10204 Type 3.2
- Impact Strength: 34 J at 0°C
Certifications
Chemical Compositions
Element | Content (%) |
---|---|
Carbon, C | ≤ 0.18 |
Manganese, Mn | 0.90-1.60 |
Silicon, Si | ≤ 0.50 |
Phosphorus, P | ≤ 0.035 |
Sulfur, S | ≤ 0.035 |
Aluminum, Al (acid-soluble) | ≥ 0.015 |
Nitrogen, N | ≤ 0.020 |
Copper, Cu | ≤ 0.35 |
Nickel, Ni | ≤ 0.40 |
Chromium, Cr | ≤ 0.25 |
Molybdenum, Mo | ≤ 0.08 |
Vanadium, V | ≤ 0.05 |
Niobium, Nb | ≤ 0.02 |
Titanium, Ti | ≤ 0.02 |
Calcium, Ca | ≤ 0.05 |
Physical Properties
Property | Metric | Imperial |
---|---|---|
Density | 7.85 g/cm³ | 0.284 lb/in³ |
Melting Point | 1,510 °C | 2,750 °F |
Boiling Point | – | – |
Thermal Conductivity | 40 W/m·K | 277 BTU·in/hr·ft²·°F |
Electrical Conductivity | – | – |
Specific Heat Capacity | 0.49 J/g·K | 0.117 BTU/lb·°F |
Thermal Expansion Coefficient | 12 µm/m·°C | 6.7 µin/in·°F |
Electrical Resistivity | 0.2 µΩ·m | 7.87 µΩ·in |
Mechanical Properties
AC (Air Cooled) Sate
Property | Metric Units | Imperial Units |
---|---|---|
Tensile Strength | 510-690 MPa | 74-100 ksi |
Yield Strength | 355 MPa | 51.5 ksi |
Brinell Hardness HB | 170-210 | 170-210 |
Rockwell Hardness HRB | 73 – 91 | 73 – 91 |
Vickers Hardness HV | 180 – 230 | 180 – 230 |
Elongation | 21% | 21% |
Elastic Modulus | 200 GPa | 29 msi |
QT (Quenched & Tempered) State
Property | Metric Value | Imperial Value |
---|---|---|
Tensile Strength | 490-620 MPa | 71-90 ksi |
Yield Strength | ≥ 355 MPa | ≥ 51 ksi |
Elongation | ≥ 21% | ≥ 21% |
Reduction of Area | ≥ 40% | ≥ 40% |
Impact Absorption Energy | ≥ 27 J at -40°C | ≥ 20 ft-lbs at -40°F |
Elastic Modulus | 200 GPa | 29 msi |
Industries & Applications
Industry | Application |
---|---|
Shipbuilding | Hull structures, Deck plating, Bulkheads, Keels |
Offshore Structures | Oil rig platforms, Subsea pipelines, Wind turbine foundations, Support frames |
Bridge Construction | Main bridge girders, Suspension cables, Bridge deck panels, Arch ribs |
Heavy Machinery | Excavator arms, Crane booms, Bulldozer blades, Forklift frames |
Automotive | Chassis components, Frame rails, Suspension arms, Crossmembers |
Construction | Structural beams, Column supports, Reinforcement bars, Steel pilings |
Pressure Vessels | Boiler shells, Reactor vessels, Heat exchangers, Storage tanks |
Energy | Wind turbine towers, Power plant boilers, Solar panel mounts, Turbine casings |
Tool & Die | Dies, Punches, Molds, Forming Tools |
Machining
Heat Treatment
- Normalization: Heat the steel to 900-950°C (1652-1742°F), hold until uniformly heated, then cool in still air.
- Stress Relieving: Heat to 550-650°C (1022-1202°F), hold for 1 hour per inch of thickness, then cool in still air.
- Quenching: Heat to 890-950°C (1634-1742°F), quench in water or oil.
- Tempering: Reheat to 550-700°C (1022-1292°F) based on desired properties, hold for 1 hour per inch of thickness, then cool in still air.
Surface Finish
- As Rolled (AR): Unprocessed with scale.
- Shot Blasted and Primed: Cleaned and coated to prevent corrosion.
- Pickled and Oiled: Acid-treated and oiled for rust prevention.
- Sand Blasted: Sand-cleaned for a smooth surface.
- Painted or Coated: Additional protective layers applied.
*Customization is available upon request.
Disclaimer
The provided heat treatment and surface treatment processes are general guidelines. Actual conditions may vary depending on specific applications and requirements. It is recommended to consult with a professional metallurgist or material scientist to tailor the processes to your particular needs. The information herein is not a substitute for professional advice and should not be relied upon as such.
Our Service
SteelPRO Group – manufacturer and solution provider for special steel, offering multi-industry application solutions and customised services, 100% quality free, accompanying customers in their growth!
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