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Stainless Steel 409 409M 410

Provides high strength and high wear resistance
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Stainless Steel 409 409M 410

"The 400 series group of stainless steels has an 11 percent chromium and 1-percent manganese increase, above the 300 series group. The 400 series is susceptible to rust and corrosion under some conditions. Heat-treating will harden the 400 series. The 400 series of stainless steels have higher carbon content, giving it a martensitic crystalline structure. This provides high strength and high wear resistance. Martensitic stainless steels aren’t as corrosion resistant as the austenitic types.

409 Stainless Steel

Rajasthan Steel Centre are inventory now includes Alloy 409 (UNS S40900) in sheet, sheet coil, plate, round bar, processed flat bar and tubular products.

General Properties

Alloy 409 is a general purpose, chromium, titanium stabilized, ferritic stainless steel whose primary application is automotive exhaust systems. It contains 11% chromium which is the minimum amount for the formation of the passive surface film which gives stainless steels their corrosion resistance.

 
It combines good elevated temperature corrosion resistance with medium strength, good formability, and overall cost. Alloy 409 resists corrosion strongly compared to carbon steel and is used as an alternative to carbon steel in mildly challenging environments where its high resistance to corrosion and high temperature oxidation gives an advantage. It is commonly used in applications where appearance is a secondary quality to mechanical properties and corrosion resistance.

Applications:

Although Alloy 409 is designed principally for the automotive exhaust industry, it has been successfully used in other industrial applications as well. Some examples of applications that call for Alloy 409 include:

  • Automotive exhaust systems
  • Catalytic converters
  • Mufflers
  • Tailpipes
  • Farm equipment
  • Structural support and hangers
  • Transformer cases
  • Furnace components
  • Heat exchanger tubing
Standards:
  • ASTM/ASME: UNS S40900
  • EURONORM: FeMi35Cr20Cu4Mo2
  • DIN: 2.4660

Chemical composition:
C Mn Si P S Cr Ni Ti
409 max:0.08   max:1.0 max:1.0 max:0.045 max: 0.045 min: 10.5 max: 11.75 max: 0.5 min: 0.48  max: 0.75

Mechanical Properties:
Grade Tensile Strength MPa (min) Yield Strength 0.2% MPa(min) Elongation % Hardness (Brinell) MAX Hardness (Rockwell B) MAX
409 380 207 20 207 95

Physical Properties
Density
lbm/in3		 Thermal Conductivity
(BTU/h ft. °F)		 Electrical
Resistivity
(in x 10-6)		 Modulus of
Elasticity
(psi x 106		 Coefficient of
Thermal Expansion
(in/in)/
°F x 10-6		 Specific Heat
(BTU/lb/
°F)		 Melting
Range
(°F)
at 68°F: 0.280 9.4 at 212°F 28.3 at 68°F 29 5.84 at 32 – 212°F 0.114 at 68°F to 212°F 2500 to 2590
12.4 at 932 °F 39.4 at 752°F 6.60 at 32 – 1000°F
49.6 at 1652 °F 6.86 at 32 – 1500°F
409M Stainless Steel

Rajasthan Steel Centre aare Manufacturers, Supplier and Exporters of Stainless Steel 409M Stainless Steel and Rods that is Fabricated From High Quality Raw Materials. 409M Stainless Steel is a low carbon austenitic alloy. 409M Stainless Steel other sizes can be made available on request.

Specifications: 
AISI 304L, UNS S30403, Werks
  • Dimensions.

    Pipe sizes normally furnished are NPS 14 to NPS 30 with extra light (Schedule 5S) and light (Schedule 10S) wall thickness.

  • Minimum Wall Thickness.

    At any point this must not be more than 0.018 in (0.46 mm) under the specified wall thickness.

  • Outside Diameter.

    For wall thicknesses <0.188 in (4.8 mm) OD tolerance is ±20%. For wall thicknesses >0.188 in (4.8 mm) OD tolerance is ±40%.

  • Out-of-Roundness.

    The difference between maximum and minimum OD must be <1.5% of the specified OD.

  • Straightness.

    Deviation from 10 ft (3 m) straight edge is < 3/16 in (4.8 mm).

  • Cut Lengths.

    Unless otherwise specified, pipes NPS 22 are not less than 5 ft. Circumferential welding of two or more lengths may be specified.

Chemical composition:
Grade C Mn Si P S Cr Mo Ni N
409M 0.03 max 0.81.2 max 0.40.75 max 0.030 max 0.030 max 11 – 12 - 1.5 Max -

Mechanical & Physical Properties:
Hardness ( BHN ) 187
Hardness ( RB ) 90
Tensile Strength 430
Yield Strength (0.2%Offset) 275
Elongation 20 %
410 Stainless Steel

Rajasthan Steel Centre inventory now includes Alloy 410 (UNS S41000) in sheet, sheet coil, plate, round bar, processed flat bar and tubular products.

General Properties

Alloy 410 is the basic, general purpose martensitic stainless steel that is used for highly stressed parts and provides good corrosion resistance plus high strength and hardness.

 
Alloy 410 contains a minimum of 11.5% chromium which is just sufficient enough to demonstrate corrosion resistance properties in mild atmospheres, steam, and many mild chemical environments. It is a general purpose grade that is often supplied in the hardened but still machineable condition for applications where high strength and moderate heat and corrosion resistance are required. Alloy 410 displays maximum corrosion resistance when it’s been hardened, tempered, and then polished.

Specifications: UNS S30400 / S30403

Applications:

Applications requiring moderate corrosion resistance and high mechanical properties are ideal for Alloy 410. Examples of applications that frequently used Alloy 410 include:

  • Cutlery
  • Steam and gas turbine blades
  • Kitchen utensils
  • Bolts, nuts, screws
  • Pump and valve parts and shafts
  • Mine ladder rugs
  • Dental and surgical instruments
  • Nozzles
  • Hardened steel balls and seats for oil well pumps

 

Standards:
  • ASTM/ASME: UNS S41000
  • EURONORM: FeMi35Cr20Cu4Mo2
  • DIN: 2.4660
Chemical Properties:
C Mn Si P S Cr Ni
410 0.15 max 1.00 max 1.00 max 0.04 max 0.03 max min: 11.5
max: 13.5		 0.50 max
Mechanical Properties:
Grade Tensile Strength ksi (MPa) min Yield Strength 0.2% offset ksi (MPa) min Elongation (% in 50mm) min Hardness (Brinell) MAX Hardness (Rockwell B) MAX
410 65 (450) 30 (205) 20 217 96
Mechanical Properties of Heat Treated 410:
Heat Treatment T410 (0.14%C) Hardened 1800°F (982°C)
Rockwell Hardness 0.2% YS, Ksi (MPa) UTS, Ksi (MPa)
Annealed* 81 HRB 45.4  (313) 80.4  (554)
 Hardened & Tempered 400°F (204°C) 43 HRC 156.1  (1076)  202.9  (1399)
 Hardened & Tempered 550°F (288°C)  40 HRC 148.3  (1022)  187.0  (1289)
Hardened & Tempered 600°F (316°C) 40 HRC 148.8  (1026) 186.1  (1283)
Hardened & Tempered 800°F (427°C) 41 HRC 132.9 (916) 188.5  (1300)
Hardened & Tempered 900°F (482°C) 41 HRC 122.6 (845) 154.3  (1063)
Hardened & Tempered 1000°F (538°C) 35 HRC 127.9  (882) 154.3  (1063)
Hardened & Tempered 1200°F (649°C) 98 HRB 85.5  (589) 111.2  (767)
 Physical Properties:
Density
lbm/in3		 Thermal Conductivity
(BTU/h ft. °F)		 Electrical
Resistivity
(in x 10-6)		 Modulus of
Elasticity
(psi x 106		 Coefficient of
Thermal Expansion
(in/in)/
°F x 10-6		 Specific Heat
(BTU/lb/
°F)		 Melting
Range
(°F)
at 68°F: 0.276 14.4 at 212°F 56 at 68°F 29 5.90 at 68 – 392°F 0.11 at 68°F to 212°F 2700 to 2790
6.5 at 68 – 1112°F
Stainless Steel
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