DH36 | HSLA Steel Shipbuilding Steel
Description
What Is DH36?
DH36 is a high-strength structural steel primarily used in shipbuilding. It consists of approximately 98% iron and 2% carbon and alloying elements. This steel is characterized by its solid form and is typically dark grey in color. Key properties include high yield strength, good toughness, and excellent weldability. DH36 is commonly used in the construction of ship hulls, offshore structures, and marine engineering projects. It is produced through the hot-rolling process and falls under the category of high-strength, low-alloy steel.Characteristics of DH36
DH36 steel offers high tensile strength and excellent toughness. It has good weldability, allowing for easy fabrication. The steel’s resilience in harsh marine environments makes it ideal for shipbuilding. It is also resistant to corrosion, enhancing its durability. DH36 is commonly used in constructing ship hulls and offshore structures. For applications requiring even higher strength or specific properties, consider steel grades like AH36, EH36, or FH36. These alternatives provide variations in strength and toughness to meet diverse engineering needs.Chemical Compositions
| Element | Content (%) |
|---|---|
| Carbon, C | ≤ 0.18 |
| Silicon, Si | 0.10 – 0.50 |
| Manganese, Mn | 0.90 – 1.60 |
| Phosphorus, P | ≤ 0.035 |
| Sulfur, S | ≤ 0.035 |
| Nitrogen, N | ≤ 0.012 |
| Copper, Cu | ≤ 0.35 |
| Chromium, Cr | ≤ 0.20 |
| Nickel, Ni | ≤ 0.40 |
| Molybdenum, Mo | ≤ 0.08 |
| Vanadium, V | ≤ 0.10 |
Physical Properties
| Property | Metric | Imperial |
|---|---|---|
| Density | 7.8 g/cm³ | 0.282 lb/in³ |
| Melting Point | 1510 °C | 2750 °F |
| Boiling Point | – | – |
| Thermal Conductivity | 50 W/m·K | 29 Btu·ft/(h·ft²·°F) |
| Electrical Conductivity | 6.99 × 10⁶ S/m | 12.1 % IACS |
| Specific Heat Capacity | 486 J/kg·K | 0.116 Btu/(lb·°F) |
| Thermal Expansion Coefficient | 12 x 10⁻⁶ /°C | 6.7 x 10⁻⁶ /°F |
| Electrical Resistivity | 1.43 x 10⁻⁷ Ω·m | 8.6 x 10⁻⁷ Ω·in |
Mechanical Properties
AC (Air Cooled) Sate
| Property | Metric | Imperial |
|---|---|---|
| Tensile Strength | 490 – 620 MPa | 71 – 90 ksi |
| Yield Strength | ≥ 355 MPa | ≥ 52 ksi |
| Brinell Hardness HB | 170 – 220 | 170 – 220 |
| Rockwell Hardness HRB | 80-95 | 80-95 |
| Vickers Hardness HV | 180 – 240 | 180 – 240 |
| Elongation | 21% (in 200 mm) | 21% (in 8 in) |
| Elastic Modulus | 210 GPa | 30.5 msi |
QT (Quenched & Tempered) State
| Property | Metric | Imperial |
|---|---|---|
| Tensile Strength | 490-620 MPa | 71-90 ksi |
| Yield Strength | 355 MPa | 51.5 ksi |
| Elongation | 21% | 21% |
| Reduction of Area | 50% (typically) | 50% (typically) |
| Impact Absorption Energy | 34 J at -20°C | 25 ft·lbf at -4°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 |
Machining
Heat Treatment
Our Service
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