409 Stainless Steel
409 Stainless Steel
409L stainless steel is a low-carbon ferritic stainless steel containing 11% to 12% chromium and 0.03% to 0.1% carbon. It is widely used in automobile exhaust systems, furnace parts, heat-resistant devices, and other fields. 409L stainless steel has good heat resistance, corrosion resistance, and oxidation resistance, and is especially suitable for use in high-temperature environments. Its low carbon content makes it have excellent welding properties, is easy to process into various shapes, and its mechanical properties can be improved by heat treatment under appropriate conditions. 409L stainless steel is favored for its affordability and good corrosion resistance and is one of the materials of choice in many industrial applications.
Ferritic stainless steel is a stainless steel with a chromium content higher than 12% and is used in the ferrite state. Its basic characteristics include corrosion resistance, strength, and plasticity. The chromium content of ferritic stainless steel gives it good corrosion resistance, making it resistant to most chemicals and atmospheric corrosion. Compared with other stainless steels, ferritic stainless steel has higher strength and hardness, as well as good processing properties, and can be formed by cold working and hot working. In addition, ferritic stainless steel also has magnetism and good welding properties and can be used in situations where magnetism and various welding processes are required. In terms of application scenarios, ferritic stainless steel is widely used in construction, automotive industry, food processing, chemical industry, and medical fields.
409 Stainless Steel Data Sheet
Steel Grade
Product Specifications
Production Standards
Chemical Composition
Mechanical Properties
Steel Grade
Steel Number
430
409L
443
441
439
430LX
Chinese
1Cr17
00Cr11Ti
00Cr18Mo2
00Cr19NbTi
0Cr18Ti
1Cr17LX
American
AISI 430
AISI 409
AISI 443
AISI 441
AISI 439
AISI 430LX
Japanese
SUS 430
SUS 409L
SUS 443
SUS 441
SUS 439
SUS 430LX
German
X6Cr17
X2CrTi12
X2CrMoTi18-2
X2CrTiNb18
X2CrTi17
X2CrTi17
Product Specifications
Plate
Thickness: 0.2-16 mm
Width: 1000-2000 mm
Length: 2438 mm, 3000 mm, 6000 mm, or custom millimeters
Rod
Diameter: 5-1400 mm
Production Methods: Rolling, cold drawing, forging
Production Standards
430: This steel grade corresponds to ASTM A240, ASTM A276, ASTM A580, and EN 10088-3 standards.
409L: Associated with ASTM A240, ASTM A268, and ASTM A240 standards.
443: Complies with ASTM A240 and ASTM A240 standards.
441: This steel grade follows ASTM A240, ASTM A268, and EN 10088-2 standards.
439: Associated with ASTM A240 and EN 10088-3 standards.
430LX: Complies with ASTM A240, ASTM A268, and EN 10088-2 standards.
Chemical Composition
430: The carbon content (C) is ≤0.12%, chromium (Cr) ranges from 16.0-18.0%, manganese (Mn) is ≤1.00%, silicon (Si) is ≤1.00%, and no nickel (Ni) is present.
409L: The carbon content (C) is ≤0.03%, chromium (Cr) ranges from 10.5-11.7%, manganese (Mn) is ≤1.00%, silicon (Si) is ≤1.00%, and no nickel (Ni) is present.
443: The carbon content (C) is ≤0.12%, chromium (Cr) ranges from 20.0-22.0%, manganese (Mn) is ≤1.00%, silicon (Si) is ≤1.00%, and no nickel (Ni) is present.
441: The carbon content (C) is ≤0.02%, chromium (Cr) ranges from 17.5-18.5%, manganese (Mn) is ≤1.00%, silicon (Si) is ≤1.00%, and no nickel (Ni) is present.
439: The carbon content (C) is ≤0.03%, chromium (Cr) ranges from 17.0-19.0%, manganese (Mn) is ≤1.00%, silicon (Si) is ≤1.00%, and no nickel (Ni) is present.
430LX: The carbon content (C) is ≤0.03%, chromium (Cr) ranges from 16.0-18.0%, manganese (Mn) is ≤1.00%, silicon (Si) is ≤1.00%, and no nickel (Ni) is present.
Mechanical Properties
430: Tensile strength is ≥450 MPa, yield strength is ≥205 MPa, and elongation is ≥22%.
409L: Tensile strength is ≥380 MPa, yield strength is ≥205 MPa, and elongation is ≥22%.
443: Tensile strength is ≥550 MPa, yield strength is ≥275 MPa, and elongation is ≥22%.
441: Tensile strength is ≥380 MPa, yield strength is ≥205 MPa, and elongation is ≥22%.
439: Tensile strength is ≥380 MPa, yield strength is ≥205 MPa, and elongation is ≥22%.
430LX: Tensile strength is ≥450 MPa, yield strength is ≥225 MPa, and elongation is ≥22%.
409 and 430 Stainless Steel
In the industrial field, 430 and 409L stainless steel are two common materials that play important roles in many applications. Although they all fall into the category of ferritic stainless steel, they have some significant differences in chemical composition, mechanical properties, and applications.
409 and 430 Stainless Steel Data Sheet
Chemical Composition
Mechanical Properties
Applications
Chemical Composition
The main components of 430 stainless steel are chromium and a small amount of carbon, usually containing 16-18% chromium and less than 0.12% carbon. In comparison, 409L stainless steel contains less chromium and a certain amount of titanium, typically containing 10.5-11.7% chromium and less than 0.03% carbon. Due to their different chemical compositions, the two materials show significant differences in corrosion resistance and mechanical properties.
Mechanical Properties
430 stainless steel performs better in terms of tensile strength and hardness, but its yield strength is relatively low. While 409L stainless steel has lower tensile strength, its yield strength is relatively high. This means that in some applications where strength is a priority, 409L stainless steel may be preferred, while where higher hardness and wear resistance are required, 430 stainless steel may be more suitable.
Applications
Due to its high chromium content, 430 stainless steel has good corrosion resistance in dryness and air and is often used to make home appliances, kitchenware, and other products. Because 409L stainless steel contains titanium, it has good oxidation resistance at high temperatures and is often used in high-temperature environments such as automobile exhaust systems and stoves.
Through these product cases, we can see the applications of 430 and 409L stainless steel in different fields. Their individual properties make them ideal materials for specific products and provide these products with excellent performance and reliability.
