About ASTM A403 WP321 Stainless Steel Alloy 321, also known as UNS S32100, is a titanium-stabilized variant of Stainless Steel Grade 304. This alloy features an 18/8 blend of chromium and nickel, enhanced with titanium to provide protection against intergranular corrosion, which can occur following heat treatment. The ASTM A403 WP321 Pipe Fittings are designed to withstand elevated temperatures ranging from 800 to 1500°F. This alloy exhibits high tensile strength and excellent resistance to various forms of corrosion, including in aqueous environments. As a result, Stainless Steel 321 Pipe Fittings are commonly used in heavy welding applications and dynamic environments where conditions frequently change, such as in process-based industries. GOST 90DEG DN50 ASTM A403 WP321 Elbows click to preview the…
Stainless Steel Alloy 321, also known as UNS S32100, is a titanium-stabilized variant of Stainless Steel Grade 304. This alloy features an 18/8 blend of chromium and nickel, enhanced with titanium to provide protection against intergranular corrosion, which can occur following heat treatment. The ASTM A403 WP321 Pipe Fittings are designed to withstand elevated temperatures ranging from 800 to 1500°F. This alloy exhibits high tensile strength and excellent resistance to various forms of corrosion, including in aqueous environments. As a result, Stainless Steel 321 Pipe Fittings are commonly used in heavy welding applications and dynamic environments where conditions frequently change, such as in process-based industries.
However, the incorporation of titanium in the alloy can limit its applications. Many manufacturers do not recommend using A403 WP321 Elbows with certain welding techniques because the alloy is not consumable. Despite this limitation, Stainless Steel 321 possesses outstanding forming characteristics, eliminating the need for annealing after welding the SS 321 Pipe Fittings. Additionally, these fittings maintain toughness across a wide temperature range, demonstrating good tensile strength even at cryogenic temperatures. Fittings like the UNS S32100 Tee are often preferred over Grade 304 due to their enhanced resistance to creep and rupture. Nevertheless, both Grade 304 and Stainless Steel Alloy 321 are susceptible to stress-related corrosion cracking.
ASTM A403 WP321 90DEG Elbow Angle Measurement
ASTM A403 WP321 90DEG Elbow Dimension Measurement
ASTM A403 WP321 90DEG Elbow Thickness Measurement
ASTM A403 WP321 90DEG Elbow Hardness Test
ASTM A403 WP321 90DEG Elbow PMI Test
Composition ranges for 321 grade stainless steel
Grade
C
Mn
Si
P
S
Cr
Mo
Ni
N
Other
321
min.max
-0.08
2.00
0.75
0.045
0.030
17.019.0
–
9.012.0
0.10
Ti=5(C+N)0.70
321H
min.max
0.040.10
2.00
0.75
0.045
0.030
17.019.0
–
9.012.0
–
Ti=4(C+N)0.70
Mechanical properties of A403 WP321
Grade
Tensile Strength (MPa) min
Yield Strength 0.2% Proof (MPa) min
Elongation (% in 50mm) min
Hardness
Rockwell B (HR B) max
Brinell (HB) max
321
515
205
40
95
217
321H
515
205
40
95
217
321H also has a requirement for a grain size of ASTM No 7 or coarser.
Equivalent of A403 WP321 Fittings
STANDARD
WERKSTOFF NR.
UNS
SS 321
1.4541
S32100
Physical properties of 321 grade stainless steel in the annealed condition
Grade
Density (kg/m3)
Elastic Modulus (GPa)
Mean Coefficient of Thermal Expansion (μm/m/°C)
Thermal Conductivity (W/m.K)
Specific Heat 0-100°C (J/kg.K)
Electrical Resistivity (nΩ.m)
0-100°C
0-315°C
0-538°C
at 100°C
at 500°C
321
8027
193
16.6
17.2
18.6
16.1
22.2
500
720
Grade specifications for 321 grade stainless steel
Grade
UNS No
Old British
Euronorm
Swedish SS
Japanese JIS
BS
En
No
Name
321
S32100
321S31
58B, 58C
1.4541
X6CrNiTi18-10
2337
SUS 321
321H
S32109
321S51
–
1.4878
X10CrNiTi18-10
–
SUS 321H
These comparisons are approximate only. The list is intended as a comparison of functionally similar materials not as a schedule of contractual equivalents. If exact equivalents are needed original specifications must be consulted.
We are a specialist supplier & distributor of ASTM A403 WP321 Fittings and Stainless Steel 321 Fitting
The ASTM A403 WP321 Elbow is utilized to change the direction of flow, typically at angles of 45, 90, 22.5, and 180 degrees. These elbows come in both long and short radius specifications. C&N is your one-stop supplier for all ASTM A403 WP321 Fitting needs, including ASTM A403 WP321 Stub Ends, ASTM A403 SS 321 Buttweld Pipes, and SS 321 Elbows. For more product information, please visit our website and YouTube channel. For pricing inquiries, feel free to contact us today!
Standard
ASTM / ASME A403/ SA403
Grade
(UNS S32100) Stainless Steel 321
Size
From 1/2″ to 48″
Type
Elbow, Stubend, Tee, Cross, Reducer, Bend, Nipple, Pipe Cap
Stainless pipe fitting,stainless fitting,duplex stainless,31803,32750,32760,we are one of largest sour service stainless fitting supplier according to ISO 10156.
ASTM A403 WP321 90DEG Elbow Angle Measurement
ASTM A403 WP321 90DEG Elbow Dimension Measurement
ASTM A403 WP321 90DEG Elbow Thickness Measurement
ASTM A403 WP321 90DEG Elbow Hardness Test
ASTM A403 WP321 90DEG Elbow PMI Test
