Views: 3 Author: Site Editor Publish Time: 2023-12-04 Origin: Site
ASTM A182 F11 is a relatively common alloy flange, which is divided into three grades, each with different chemical composition and mechanical property requirements, to accommodate different environments for pipeline systems.
Chemical Compsition
GRADE | LIMIT | C | Mn | P | S | Si | Cr | Mo |
ASTM A182 F11 CLASS1 | MIN | 0.05 | 0.30 | 0.50 | 1.00 | 0.44 | ||
MAX | 0.15 | 0.60 | 0.030 | 0.030 | 1.00 | 1.50 | 0.65 | |
ASTM A182 F11 CLASS2 | MIN | 0.10 | 0.30 | 0.50 | 1.00 | 0.44 | ||
MAX | 0.20 | 0.80 | 0.040 | 0.040 | 1.00 | 1.50 | 0.65 | |
ASTM A182 F11 CLASS3 | MIN | 0.10 | 0.30 | 0.50 | 1.00 | 0.44 | ||
MAX | 0.20 | 0.80 | 0.040 | 0.040 | 1.00 | 1.50 | 0.65 |
Mechenical Properties
GRADE | TENSILE STRENGTH MIN （Mpa） | YIELD STRENGTH MIN （Mpa） | ELONGATION MIN | REDUCTION OF AREA MIN | HARDNESS |
ASTM A182 F11 CLASS1 | 415 | 205 | 20 | 45 | 121-174 |
ASTM A182 F11 CLASS2 | 485 | 275 | 20 | 30 | 143-207 |
ASTM A182 F11 CLASS3 | 515 | 310 | 20 | 30 | 156-207 |
Alloy flanges have strong corrosion resistance, high temperature resistance, excellent sealing performance, and rigid and elastic requirements, and are widely used in various industrial fields.
Performance of ASTM A182 Stainless Steel
ASTM A182 F304/304H/304L are all austenitic stainless steel materials, which are commonly used in the raw materials of ASTM A182 butt welding flanges. Their prices are relatively cheaper than stainless steel materials such as 316 and 904, so they are widely used in pipeline systems.
Chemical Composition
GRADE | LIMIT | C | Mn | P | S | Si | Ni | Cr | N |
ASTM A182 F304 | MIN | 8.00 | 18.0 | ||||||
MAX | 0.08 | 2.00 | 0.045 | 0.030 | 1.00 | 11.00 | 20.0 | 0.1 | |
ASTM A182 F304H | MIN | 0.04 | 8.00 | 18.0 | |||||
MAX | 0.10 | 2.00 | 0.045 | 0.030 | 1.00 | 11.00 | 20.0 | ||
ASTM A182 F304L | MIN | 8.00 | 18.0 | ||||||
MAX | 0.03 | 2.00 | 0.045 | 0.030 | 1.00 | 13.00 | 20.0 | 0.1 |
Mechanical properties
GRADE | TENSILE STRENGTH MIN （Mpa） | YIELD STRENGTH MIN （Mpa） | ELONGATION MIN | REDUCTION OF AREA MIN |
ASTM A182 F304 | 515 | 205 | 30 | 50 |
ASTM A182 F304H | 515 | 205 | 30 | 50 |
ASTM A182 F304L | 485 | 170 | 20 | 30 |
Duplex Stainless Steel
Duplex stainless steel (DSS) refers to a type of stainless steel with a composition of 50% ferrite and 50% austenite.In the case of low carbon content, the Cr content is 18% to 28% and the Ni content is 3% to 10%.Some steels also contain alloying elements such as Mo, Cu, Nb, Ti, N, etc. This type of steel combines the characteristics of austenitic and ferritic stainless steels, with higher plasticity and toughness compared to ferritic stainless steel, no room temperature brittleness, significantly improved intergranular corrosion resistance and weldability, while maintaining the 475°C brittleness of ferritic stainless steel and high thermal conductivity, with superplastic characteristics.Compared to austenitic stainless steel, duplex stainless steel has higher strength and significantly improved resistance to intergranular corrosion and chloride stress corrosion.Duplex stainless steel has excellent pitting corrosion resistance and is also a nickel-saving stainless steel.
ASTM A182 F51/53/55 is a duplex stainless steel that is commonly used for forging ASTM A182 welding neck flanges. Duplex steel is more commonly used in pipelines used in some special environments, where higher material requirements are imposed, and it can play a greater role.
Chemical Composition
GRADE | LIMIT | C | Mn | P | S | Si | Ni | Cr | Mo | N | Cu |
ASTM A182 F51 | MIN | 4.50 | 21.0 | 2.5 | 0.08 | ||||||
MAX | 0.030 | 2.00 | 0.045 | 0.030 | 1.00 | 6.50 | 23.0 | 3.5 | 0.20 | ||
ASTM A182 F53 | MIN | 6.00 | 24.0 | 3.0 | 0.24 | ||||||
MAX | 0.030 | 1.20 | 0.035 | 0.020 | 0.80 | 8.00 | 26.0 | 5.0 | 0.32 | 0.50 | |
ASTM A182 F55 | MIN | 6.00 | 24.0 | 2.5 | 0.24 | 0.50 | |||||
MAX | 0.030 | 1.00 | 0.030 | 0.010 | 1.00 | 8.00 | 26.0 | 3.5 | 0.32 | 1.00 |
Mechanical Properties
GRADE | TENSILE STRENGTH MIN （Mpa） | YIELD STRENGTH MIN （Mpa） | ELONGATION MIN | REDUCTION OF AREA MIN | HARDNESS MAX |
ASTM A182 F51 | 620 | 450 | 25 | 45 | |
ASTM A182 F53≤2IN CLASS1 | 785 | 525 | 30 | 310 | |
ASTM A182 F53≤2IN CLASS2 | 800 | 550 | 15 | 310 | |
ASTM A182 F53＞2IN | 730 | 515 | 15 | 310 | |
ASTM A182 F55 | 750-895 | 550 | 25 | 45 |
ASTM A182 welding neck flanges are widely used, and the range of use can be selected based on different characteristics using flanges of different materials.In addition, the ASTM A182 standard also stipulates the requirements for the relative tensile strength, creep resistance, and ductility of steel used in hot water and steam systems to ensure the hardness, toughness, and strength of the material.Overall, ASTM A182 welding neck flanges are a pipe material with good performance and wide application areas, and their manufacturing and inspection standards strictly ensure their quality and reliability.
