Top Industrial Applications of High Strength Stainless Steels in 2025

Aerospace applications require metals that can maintain strength even under vibration, fatigue loading, high temperature, extreme pressure, and corrosive aviation fluids.

• Very high tensile strength (up to 1400 MPa)
• Excellent fatigue & fracture toughness
• Good corrosion resistance
• Dimensional stability

• 15-5 PH — excellent toughness
• 13-8 MO — superior SCC resistance
• 17-4 PH — versatile and cost-effective

• Landing gear components
• Engine parts
• Actuator housings
• Structural brackets
• Shafts, flanges & hydraulic fittings
• Flight control mechanisms

Oil & gas equipment faces sour gas (H₂S), chlorides, high pressure (up to 30,000 psi), abrasion, and extreme temperatures.

• 17-4 PH
• 15-5 PH
• 13-8 MO
• Super Duplex 2507

• Downhole tools
• Valves & ball seats
• Chokes & wellhead components
• Pump shafts & impellers
• Measurement-while-drilling (MWD) tools
• Subsea connectors

Seawater environments are extremely corrosive due to chloride ions, salinity variations, oxygen-rich water, and galvanic reactions.

• Super Duplex 2507 (top choice)
• 431 Stainless Steel
• 17-4 PH (when coated)

• Propeller shafts
• Marine pumps
• Subsea valves
• Offshore structural components
• ROV and AUV parts
• High-pressure water systems

Defence applications require high fatigue life, shock absorption, dimensional accuracy, corrosion resistance, and long service life in harsh environments.

• 15-5 PH
• 13-8 MO
• 440C (weapons-grade)

• Missile components
• Firing pins & weapon systems
• Armoured vehicle parts
• High-pressure hydraulic systems
• Aircraft frame components

Chemical plants require steels that can resist acidic & caustic chemicals, withstand 24/7 continuous operation, and deliver excellent wear resistance.

• 17-4 PH
• 15-5 PH
• Super Duplex 2507

• Reactor internals
• Heat exchangers (high pressure)
• Pump impellers
• Chemical injection systems
• Distillation towers

Automotive and rail applications require wear resistance, fatigue strength, and dimensional accuracy.

• 17-4 PH
• 440C (high hardness)
• 431 Stainless Steel

• Steering components
• Drive shafts
• Gear parts
• Suspension components
• High-performance brake systems

These industries require hygiene, corrosion-free equipment, and high wear resistance.

• 17-4 PH
• 15-5 PH

• High-pressure pumps
• Sterilization equipment
• Filling machine parts

• Turbine components
• High-pressure boiler fittings
• Pump and valve parts
• Nuclear equipment (using 13-8 MO)