Grade 410 stainless steels are general-purpose martensitic stainless
steels containing 11.5% chromium, which provide good corrosion resistance
properties. However, the corrosion resistance of grade 410 steels can be further
enhanced by a series of processes such as hardening, tempering and polishing.
Quenching and tempering can harden grade 410 steels. They are generally used for
applications involving mild corrosion, heat resistance and high strength.
Martensitic stainless steels are fabricated using techniques that require final heat
treatment. These grades are less resistant to corrosion when compared to that of
austenitic grades. Their operating temperatures are often affected by their loss of
strength at high temperatures, due to over-tempering and loss of ductility at
sub-zero temperatures.
Key Properties
The properties displayed below are applicable to bar products of ASTM A276. Other
products such as forgings, wire and plate may not have similar properties.
Corrosion Resistance
Grade 410 stainless steels are resistant to hot gases, steam, food, mild acids and
alkalies, fresh water and dry air. These steels obtain maximum corrosion and heat
resistance through hardening. However, grade 410 steels are less corrosion resistant
than austenitic grades and grade 430 ferritic alloys containing 17% chromium. Smooth
surface finish offers improved performance of steels.
Heat Resistance
Grade 410 steels have good scaling resistance at temperatures of up to 650 °C. However,
the mechanical properties of the material will tend to reduce at temperatures ranging
from 400 to 580 °C.
Heat Treatment
Annealing - Grade 410 steels can be fully annealed at temperatures from 815 to 900 °C,
followed by slow furnace cooling and air-cooling. Process annealing of grade 410 steels
can be carried out at temperatures ranging from 650 to 760 °C and air-cooled.
Hardening – Hardening of grade 410 steels can be performed at 925 to 1010 °C, followed
by air and oil quenching. Heavy sections of grade 410 need to be oil quenched.
Tempering, to enhance the mechanical properties and hardness of grade 410 steels,
follows this process. It is not recommended to perform tempering at temperatures from
400 to 580 °C.
Welding
Grade 410 steels can be welded using all conventional welding techniques, but the
materials should pre-heated at 150 to 260 °C followed by post-weld annealing treatment,
to mitigate cracking. Grade 410 welding rods are recommended for tempering and
post-hardening. In the "as welded" conditions, grade 309 filler rods can be used to
achieve a ductile joint.
According to AS 1554.6 standards, grade 309 electrodes or rods are preferred for welding
410 steels.
Machining
Grade 410 steels can be easily machined in highly tempered or annealed conditions.
However, it is hard to machine grade 410 steels if they are hardened above 30HRC. Free
machining grade 416 is the best alternative.
Applications
Grade 410 stainless steels find applications in the following:
Bolts, screws, bushings and nuts
Petroleum fractionating structures
Shafts, pumps and valves
Mine ladder rungs
Gas turbines
More Products
420 Stainless Steel
Grade 420 SS is a high-carbon steel with chromium of 12%. 420 can also be hardened through heat treatment.
422 Stainless Steel
With better strength at higher temperatures, Type 422 (S42200) is an appealing alternative to Type 403.
430 Stainless Steel
Grade 430 is a non-hardenable steel containing straight chromium, and belongs to the ferritic group of steels.