SS 410 Round Bars / 410 Bar / AISI 410 Bar / SAE 410 Bars

Product Description

AISI 410 (WNr. 1.4006) is the basic, general-purpose martensitic stainless steel. It contains approximately 11.5% chromium, providing good atmospheric corrosion resistance and high mechanical properties after heat treatment. It is frequently used for parts requiring a combination of high strength, moderate heat, and corrosion resistance.

Technical Profile: SS 410 Round Bars

Chemical Composition (%)

Unlike the 300-series, 410 is a low-chromium alloy without nickel, which allows it to be hardened by quenching and tempering.

Mechanical Properties (Typical Heat Treated)

The properties of 410 are highly adjustable depending on the tempering temperature used after quenching.

• Tensile Strength: 480 a 1,100+ MPa (70 a 160+ ksi)

• Yield Strength (0.2% Offset): 275 a 1,000+ MPa (40 a 145+ ksi)

• Hardness (Brinell): 180 a 440 HBW (Condition dependent)

• Elongation: 15% a 25%

Key Characteristics

• Hardens with Heat: It can be hardened to high levels (up to 45 HRC), making it ideal for wear-resistant applications.

• Corrosion Resistance: It resists dry atmospheres, fresh water, and mild alkalies and acids. However, it is less resistant than Grade 304 or 430. Its maximum resistance is achieved in the hardened and polished condition.

• Magnetic: 410 is magnetic in all conditions.

• Heat Resistance: Good resistance to scaling up to approximately $650A C$; however, mechanical properties will decrease if tempered at high temperatures.

Common Applications

Grade 410 round bars are the "workhorse" for high-stress hardware:

• Valve and Pump Components: Shafts, seats, and trim.

• Fasteners: Bolts, screws, and bushings.

• Petrochemical Equipment: Fractionating towers and heat exchanger parts.

• Cutlery and Tools: Surgical instruments and kitchen utensils.

• Turbine Parts: Steam and gas turbine blades.

Global Designations

Processing & Weldability

• Welding: Can be welded using standard methods, but requires pre-heating to $200A C a 300A C$ and post-weld annealing to prevent cracking due to its air-hardening nature.

• Machinability: Best machined in the annealed condition. It is tougher to machine than the free-machining version (Grade 416) but offers better structural integrity.

• Heat Treatment: For full hardening, heat to $925A C a 1010A C$, followed by an oil quench. Tempering should generally be avoided in the $400A C a 580A C$ range due to a reduction in impact toughness (temper embrittlement).