Stainless Steel Pipe Fittings

Alloy 410 Stainless Steel Flange By

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Alloy 410 stainless steel flange is the general purpose 12% chromium martensitic stainless steel that can be heat treated to obtain a wide range of mechanical properties. 410 stainless steel flange possesses high strength and hardness coupled with good corrosion resistance. Alloy 410 stainless steel flange is ductile and can be formed. It is magnetic in all conditions.

Specification Sheet: Alloy 410
(UNS S41000)  W. Nr. 1.4006

General Purpose 12% Chromium Martensitic Stainless Steel Possessing High Strength and Hardness Combined with Good Corrosion Resistance

General Properties
Oxidation Resistance
Chemical Analysis
Physical Properties
Mechanical Properties
Corrosion Resistance
Fabrication Data

General Properties
Alloy 410 (UNS S41000) is a 12% chromium martensitic stainless steel flange that can be heat treated to obtain a wide range of mechanical properties. The alloy has good corrosion resistance along with high strength and hardness. In the annealed condition, 410 stainless steel flange is ductile and may be formed. It remains magnetic in both the annealed and heat treated conditions.


  • Cutlery
  • Petroleum Refining and Petrochemical Processing Equipment
  • Ore Processing
  • Sugar Processing
  • Gate valves
  • Stainless Steel flange

ASTM……….A 240
ASME……….SA 240

Oxidation Resistance
Alloy 410 stainless steel flange resists oxidation up to 1292°F (700°C) continuously, and up to 1500°F (816°C) on an intermittent basis.

Physical Properties

0.28 lbs/in3
7.74 g/cm3
  Specific Heat
0.11 BTU/lb-°F (32 – 212°F)
0.46 J/kg-°K (0 – 100°C)

Modulus of Elasticity
29 x 106 psi
200 GPa

Thermal Conductivity 212°F (100°C)
14.4 BTU/hr/ft2/ft/°F
24.9 W/m-°K

Melting Range
2700 – 2790°F
1480 – 1530°C
Electrical Resistivity
22.50 Microhm-in at 68°C
57 Microhm-cm at 20°C

Mechanical Properties
Typical Values at 68°F (20°C)
Alloy 410 mechanical Properties

Corrosion Resistance
Alloy 410 stainless steel flange is resistant to atmospheric conditions, water and some chemicals. It can be used in environments containing weak or diluted acetic acid, naptha, nitric acid and sulfuric acid. The alloy is also resistant to acids contained in foods.

410 stainless steel flange can also be used in slightly chlorinated and desaereted water. It performs well in oil and gas applications where desaereted and low hydrogen sulfide exist. However, the alloy is prone to chloride attack, particularly in oxidizing conditions.

410 stainless steel flange operates well in environments requiring moderate corrosion resistance and high mechanical properties.

Fabrication Data
Heat Treatment
Annealing – Heat slowly to 1500 – 1650°F (816 – 899°C), cool to 1100oF (593°C) in furnace, air cool
Process Annealing – Heat to 1350 – 1450°F (732 – 788°C), air cool
Hardening – Heat to 1700 – 1850°F (927 – 1010°C), air cool or oil quench. Follow by stress-relief or temper 
Stress Relieving – Heat to 300 – 800°F (149 – 427°C) for 1 to 2 hours, air cool
Tempering – Heat to 1100 – 1400°F (593 – 760°C) for 1 to 4 hours, air cool

Cold Forming
The alloy can be cold worked with moderate forming in the annealed condition.

Hot Forming
It is typically done in the 1382 – 2102°F (750 – 1150°C) range followed by air cooling. For smaller flange deformation such as bending, preheating should be done in the 212 – 572°F (100 – 300°C) temperature range. If a flange undergoes substantial deformation it should undergo a re-anneal or stress-relieving treatment at about 1202°F (650°C).

Alloy 410 stainless steel flange is best machined in the annealed condition at surface speeds of 60 – 80 feet (18.3 – 24.4m) per minute. Post machining decontamination and passivation are recommended.

Due to its martensitic structure, Alloy 410 stainless steel flange has limited weldability because of its hardenability. A post-weld heat treatment should be considered to assure the attainment of the required properties. When weld filler is needed, AWS E/ER 410, 410 NiMo and 309L are the most widely specified.

Source: Zhejiang Yaang Pipe Industry Co., Limited (

Article Categories:
Flange · Stainless Steel Flanges

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