Stainless steel seamless pipe is widely used in industries with high requirements and high standards because of its amazing corrosion resistance. ASTM A 312 covers seamless and straight seam welded steel pipe for high temperature and general corrosive service and belongs to the family of austenitic stainless steels. Today, Union Steel Industry will introduce you the specifications of ASTM A312 Stainless Steel Seamless Pipe in detail.
ASTM A312 Stainless Steel Seamless Pipe Dimension:
|
NPS, inch
|
OD, mm
|
Wall Thickness, mm
|
Max. Length, м
|
|
1/8
|
10,3
|
1,73; 2,11
|
12
|
|
1/4
|
13,7
|
2,24; 3,02
|
|
3/8
|
17,1
|
2,31; 3,20
|
|
1/2
|
21,3
|
2,11; 3,73
|
|
3/4
|
26,7
|
2,87; 3,91
|
|
1
|
33,4
|
3,38; 4,55; 6,35
|
10
|
|
1 1/4
|
42,4
|
3,56; 4,85; 6,35
|
|
1 1/2
|
48,3
|
3,68; 5,03; 7,14
|
|
2
|
60,3
|
3,58; 3,91; 4,37; 4,78; 6,35; 6,94; 7,14
|
|
2 1/2
|
73,0
|
3,58; 3,95; 4,37; 4,78; 5,16; 5,49; 6,35; 7,01
|
ASTM A312 Stainless Steel Seamless Pipe Mechanical Property:
|
Steel Grade
|
Tensile Strength, N/mm2 (min)
|
Yield Strength, N/mm2 (min)
|
Elongation, % (min)
|
|
TP304
|
515
|
205
|
35
|
|
TP304L
|
485
|
170
|
35
|
|
TP316
|
515
|
205
|
35
|
|
TP316L
|
485
|
170
|
35
|
|
TP321
|
OD < 17,1 mm - 515;
OD > 17,1 mm - 485
|
OD < 17,1 mm - 205;
OD > 17,1 mm - 170
|
35
|
ASTM A312 Stainless Steel Seamless Pipe Chemical Composition:
|
Steel Grade
|
C
|
Si
|
Mn
|
Cr
|
Ni
|
Mo
|
S
|
P
|
|
TP304
|
0,08
|
0,75
|
2
|
18 - 20
|
8 - 11
|
-
|
0,03
|
0,04
|
|
TP304L
|
0,035
|
0,75
|
2
|
18 - 20
|
8 - 13
|
-
|
0,03
|
0,04
|
|
TP316
|
0,08
|
0,75
|
2
|
16 - 18
|
11 - 14
|
2 - 3
|
0,03
|
0,04
|
|
TP316L
|
0,035
|
0,75
|
2
|
16 - 18
|
10 - 15
|
2 - 3
|
0,03
|
0,04
|
|
TP321
|
0,08
|
0,75
|
2
|
17 - 20
|
9 - 13
|
-
|
0,03
|
0,04
|
ASTM A312 Stainless Steel Seamless Pipe OD Tolerance:
|
NPS
|
ASTM A312 OD Tolerance
|
|
+
|
–
|
|
inch
|
mm
|
inch
|
mm
|
|
1/8~1 1 /2
> 1 1 /2~4
> 4~8
> 8~18
> 18~26
> 26~34
> 34~48
|
1/64(0.015)
1/32(0.031)
1/16(0.062)
3/32(0.093)
1/8(0.125)
5/32(0.156)
3/16(0.187)
|
0.4
0.8
1.6
2.4
3.2
4.0
4.8
|
1/32(0.031)
1/32(0.031)
1/32(0.031)
1/32(0.031)
1/32(0.031)
1/32(0.031)
1/32(0.031)
|
0.8
0.8
0.8
0.8
0.8
0.8
0.8
|
ASTM A312 Stainless Steel Seamless Pipe WT Tolerance %:
|
NPS
|
ASTM A312 WT Tolerance, %
|
|
+
|
–
|
|
1/8-2 1 /2
|
20.0
|
12.5
|
|
3~18, t/D≤ 5%
|
22.5
|
12.5
|
|
3~18, t/D> 5%
|
15.0
|
12.5
|
|
≥ 20, welded
|
17.5
|
12.5
|
|
≥ 20, seamless, t/D≤ 5%
|
22.5
|
12.5
|
|
≥ 20, seamless, t/D> 5%
|
15.0
|
12.5
|
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