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Definition of ASTM A182 Socket Weld Elbow
Socket weld elbow is an important pipe fitting. According to the angle, it can be divided into 45 degree and 90 degree socket elbow. It can meet the needs of different pipelines. ASTM A182 is the standard for forged or rolled alloy and stainless steel pipe flanges, forged fittings, and valves and parts for high-temperature service. It covers companents of forged low alloy and stainless steel materials. In conclusion, ASTM A182 socket weld elbow is a 45dgree or 90 degree elbow in socket weld end of alloy steel or stainless steel material.
Stainless steel socket weld elbows are made of stainless steel material and have excellent corrosion resistance and high temperature resistance. They are widely used in various industries, especially in chemical, metallurgical, power, shipbuilding and other fields.
Stainless Steel Material Grades of ASTM A182 Standard
There are vast kinds of materials included in the ASTM A182 standard, most of them are not commonly used. Below are material grade usually used in forged steel fittings and flanges. You can look up for the chemical compostion and properties for stainless steels in below chart.
ASTM A182 Socket Weld Elbow can be applied in any materials from upon chart if you need.
Chemical Compositon
| CHEMICAL | LIMITS | C | Mn | P | S | Si | Ni | Cr | Mo | N | Cu |
| ASTM A182 F304 | MIN | 8.0 | 18.0 | ||||||||
| MAX | 0.08 | 2.00 | 0.045 | 0.030 | 1.00 | 11.0 | 20.0 | 0.10 | |||
| ASTM A182 F316 | MIN | 10.0 | 16.0 | 2.00 | |||||||
| MAX | 0.08 | 2.00 | 0.045 | 0.030 | 1.00 | 14.0 | 18.0 | 3.00 | 0.01 | ||
| ASTM A182 F44 | MIN | 17.50 | 19.50 | 6.00 | 0.50 | ||||||
| MAX | 0.02 | 1.00 | 0.030 | 0.010 | 0.80 | 18.50 | 20.50 | 6.50 | 1.00 | ||
| ASTM A182 F51 | MIN | 4.50 | 21.00 | 2.50 | 0.08 | ||||||
| MAX | 0.03 | 2.00 | 0.030 | 0.020 | 1.00 | 6.50 | 23.00 | 3.50 | 0.20 | ||
| ASTM A182 F53 | MIN | 6.00 | 24.00 | 3.00 | 0.24 | ||||||
| MAX | 0.03 | 1.20 | 0.035 | 0.020 | 0.80 | 8.00 | 26.00 | 5.00 | 0.32 | 0.5 |
Mechanical Properties
| MATERIAL | ASTM A182 F304 | ASTM A182 F316 | ASTM A182 F44 | ASTM A182 F51 | ASTM A182 F53 |
| T.S (MPA) | 515 min | 515 min | 650 min | 620 min | 800 min |
| Y.S (MPA) | 205 min | 205 min | 300 min | 450 min | 550 min |
| EL % | 30 min | 30 min | 35 min | 35 min | 25 min |
| R/A % | 50 min | 50 min | 50 min | 45 min | 15 min |
| HARDNESS | 310 max |
Types of ASTM A182 Socket Weld Elbow
Depending on the shape angel, there are two types in 45 degree and 90 degree.
Divided by the pressure rating, there are three classed of the pressure: class 3000, class 600 and class 9000.
Combine these two factors together, we can have 6 different types of elbows.
Shape/material/thickness or pressure rating are the main factors to decide a fittings part exact specification.
Dimensions of Socket Weld Elbow in ASME B16.11
DN | NPS | B | G | C | |||||||
3000 | 6000 | 9000 | 3000 | 6000 | 9000 | ||||||
ave | min | ave | min | ave | min | ||||||
6 | 1/8 | 10.9 | 2.41 | 3.15 | - | 3.18 | 3.18 | 3.96 | 3.43 | - | - |
8 | 1/4 | 14.3 | 3.02 | 3.68 | - | 3.78 | 3.3 | 4.6 | 4.01 | - | - |
10 | 3/8 | 17.7 | 3.2 | 4.01 | - | 4.01 | 3.5 | 5.03 | 4.37 | - | - |
15 | 1/2 | 21.9 | 3.73 | 4.78 | 7.47 | 4.67 | 4.09 | 5.97 | 5.18 | 9.53 | 8.18 |
20 | 3/4 | 27.3 | 3.91 | 5.56 | 7.82 | 4.9 | 4.27 | 6.96 | 6.04 | 9.78 | 8.56 |
25 | 1 | 34 | 4.55 | 6.35 | 9.09 | 5.69 | 4.98 | 7.92 | 6.93 | 11.38 | 9.96 |
32 | 1-1/4 | 42.8 | 4.85 | 6.35 | 9.7 | 6.07 | 5.28 | 7.92 | 6.93 | 12.14 | 10.62 |
40 | 1-1/2 | 48.9 | 5.08 | 7.14 | 10.15 | 6.35 | 5.54 | 8.92 | 7.8 | 12.7 | 11.12 |
50 | 2 | 61.2 | 5.54 | 8.74 | 11.07 | 6.93 | 6.04 | 10.92 | 9.5 | 13.84 | 12.12 |
65 | 2-1/2 | 73.9 | 7.01 | - | - | 8.16 | 7.62 | - | - | - | - |
80 | 3 | 89.9 | 7.62 | - | - | 9.52 | 8.3 | - | - | - | - |
100 | 4 | 115.5 | 8.56 | - | - | 10.69 | 9.35 | - | - | - | - |
Definition of ASTM A182 Socket Weld Elbow
Socket weld elbow is an important pipe fitting. According to the angle, it can be divided into 45 degree and 90 degree socket elbow. It can meet the needs of different pipelines. ASTM A182 is the standard for forged or rolled alloy and stainless steel pipe flanges, forged fittings, and valves and parts for high-temperature service. It covers companents of forged low alloy and stainless steel materials. In conclusion, ASTM A182 socket weld elbow is a 45dgree or 90 degree elbow in socket weld end of alloy steel or stainless steel material.
Stainless steel socket weld elbows are made of stainless steel material and have excellent corrosion resistance and high temperature resistance. They are widely used in various industries, especially in chemical, metallurgical, power, shipbuilding and other fields.
Stainless Steel Material Grades of ASTM A182 Standard
There are vast kinds of materials included in the ASTM A182 standard, most of them are not commonly used. Below are material grade usually used in forged steel fittings and flanges. You can look up for the chemical compostion and properties for stainless steels in below chart.
ASTM A182 Socket Weld Elbow can be applied in any materials from upon chart if you need.
Chemical Compositon
| CHEMICAL | LIMITS | C | Mn | P | S | Si | Ni | Cr | Mo | N | Cu |
| ASTM A182 F304 | MIN | 8.0 | 18.0 | ||||||||
| MAX | 0.08 | 2.00 | 0.045 | 0.030 | 1.00 | 11.0 | 20.0 | 0.10 | |||
| ASTM A182 F316 | MIN | 10.0 | 16.0 | 2.00 | |||||||
| MAX | 0.08 | 2.00 | 0.045 | 0.030 | 1.00 | 14.0 | 18.0 | 3.00 | 0.01 | ||
| ASTM A182 F44 | MIN | 17.50 | 19.50 | 6.00 | 0.50 | ||||||
| MAX | 0.02 | 1.00 | 0.030 | 0.010 | 0.80 | 18.50 | 20.50 | 6.50 | 1.00 | ||
| ASTM A182 F51 | MIN | 4.50 | 21.00 | 2.50 | 0.08 | ||||||
| MAX | 0.03 | 2.00 | 0.030 | 0.020 | 1.00 | 6.50 | 23.00 | 3.50 | 0.20 | ||
| ASTM A182 F53 | MIN | 6.00 | 24.00 | 3.00 | 0.24 | ||||||
| MAX | 0.03 | 1.20 | 0.035 | 0.020 | 0.80 | 8.00 | 26.00 | 5.00 | 0.32 | 0.5 |
Mechanical Properties
| MATERIAL | ASTM A182 F304 | ASTM A182 F316 | ASTM A182 F44 | ASTM A182 F51 | ASTM A182 F53 |
| T.S (MPA) | 515 min | 515 min | 650 min | 620 min | 800 min |
| Y.S (MPA) | 205 min | 205 min | 300 min | 450 min | 550 min |
| EL % | 30 min | 30 min | 35 min | 35 min | 25 min |
| R/A % | 50 min | 50 min | 50 min | 45 min | 15 min |
| HARDNESS | 310 max |
Types of ASTM A182 Socket Weld Elbow
Depending on the shape angel, there are two types in 45 degree and 90 degree.
Divided by the pressure rating, there are three classed of the pressure: class 3000, class 600 and class 9000.
Combine these two factors together, we can have 6 different types of elbows.
Shape/material/thickness or pressure rating are the main factors to decide a fittings part exact specification.
Dimensions of Socket Weld Elbow in ASME B16.11
DN | NPS | B | G | C | |||||||
3000 | 6000 | 9000 | 3000 | 6000 | 9000 | ||||||
ave | min | ave | min | ave | min | ||||||
6 | 1/8 | 10.9 | 2.41 | 3.15 | - | 3.18 | 3.18 | 3.96 | 3.43 | - | - |
8 | 1/4 | 14.3 | 3.02 | 3.68 | - | 3.78 | 3.3 | 4.6 | 4.01 | - | - |
10 | 3/8 | 17.7 | 3.2 | 4.01 | - | 4.01 | 3.5 | 5.03 | 4.37 | - | - |
15 | 1/2 | 21.9 | 3.73 | 4.78 | 7.47 | 4.67 | 4.09 | 5.97 | 5.18 | 9.53 | 8.18 |
20 | 3/4 | 27.3 | 3.91 | 5.56 | 7.82 | 4.9 | 4.27 | 6.96 | 6.04 | 9.78 | 8.56 |
25 | 1 | 34 | 4.55 | 6.35 | 9.09 | 5.69 | 4.98 | 7.92 | 6.93 | 11.38 | 9.96 |
32 | 1-1/4 | 42.8 | 4.85 | 6.35 | 9.7 | 6.07 | 5.28 | 7.92 | 6.93 | 12.14 | 10.62 |
40 | 1-1/2 | 48.9 | 5.08 | 7.14 | 10.15 | 6.35 | 5.54 | 8.92 | 7.8 | 12.7 | 11.12 |
50 | 2 | 61.2 | 5.54 | 8.74 | 11.07 | 6.93 | 6.04 | 10.92 | 9.5 | 13.84 | 12.12 |
65 | 2-1/2 | 73.9 | 7.01 | - | - | 8.16 | 7.62 | - | - | - | - |
80 | 3 | 89.9 | 7.62 | - | - | 9.52 | 8.3 | - | - | - | - |
100 | 4 | 115.5 | 8.56 | - | - | 10.69 | 9.35 | - | - | - | - |
