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Alloy pipe is a kind of seamless steel pipe, its performance is much higher than that of general seamless steel pipe, because this type of steel pipe contains more Cr, its high temperature resistance, low temperature resistance, corrosion resistance performance is much better than other Steel pipe , so the alloy pipe is widely used in petroleum, aerospace, chemical, electric power, boiler, military and other industries.
Outside Diameter & Tolerance
|
ASTM A450 |
Hot rolled |
Outside Diameter, mm |
Tolerance, mm |
|
OD≤101.6 |
+0.4/-0.8 |
||
|
101.6＜OD≤190.5 |
+0.4/-1.2 |
||
|
190.5＜OD≤228.6 |
+0.4/-1.6 |
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|
Cold Drawn |
Outside Diameter, mm |
Tolerance, mm |
|
|
OD＜25.4 |
±0.10 |
||
|
25.4≤OD≤38.1 |
±0.15 |
||
|
38.1＜OD＜50.8 |
±0.20 |
||
|
50.8≤OD＜63.5 |
±0.25 |
||
|
63.5≤OD＜76.2 |
±0.30 |
||
|
76.2≤OD≤101.6 |
±0.38 |
||
|
101.6＜OD≤190.5 |
+0.38/-0.64 |
||
|
190.5＜OD≤228.6 |
+0.38/-1.14 |
||
|
ASTM A530 & ASTM A335 |
NPS |
Outside Diameter, inch |
Tolerance, mm |
|
1/8≤OD≤1-1/2 |
±0.40 |
||
|
1-1/2＜OD≤4 |
±0.79 |
||
|
4＜OD≤8 |
+1.59/-0.79 |
||
|
8＜OD≤12 |
+2.38/-0.79 |
||
|
OD>12 |
±1% |
|
ASTM A450 |
Hot rolled |
Outside Diameter, mm |
Tolerance, % |
|
OD≤101.6, WT≤2.4 |
+40/-0 |
||
|
OD≤101.6, 2.4＜WT≤3.8 |
+35/-0 |
||
|
OD≤101.6, 3.8＜WT≤4.6 |
+33/-0 |
||
|
OD≤101.6, WT>4.6 |
+28/-0 |
||
|
OD>101.6, 2.4＜WT≤3.8 |
+35/-0 |
||
|
OD>101.6, 3.8＜WT≤4.6 |
+33/-0 |
||
|
OD>101.6, WT>4.6 |
+28/-0 |
||
|
Cold Drawn |
Outside Diameter, mm |
Tolerance, % |
|
|
OD≤38.1 |
+20/-0 |
||
|
OD>38.1 |
+22/-0 |
||
|
ASTM A530 |
NPS |
Outside Diameter, inch |
Tolerance, % |
|
1/8≤OD≤2-1/2 |
+20.0/-12.5 |
||
|
3≤OD≤18, WT/OD≤5% |
+22.5/-12.5 |
||
|
3≤OD≤18, WT/OD>5% |
+15.0/-12.5 |
||
|
OD≥20, WT/OD≤5% |
+22.5/-12.5 |
||
|
OD≥20, WT/OD>5% |
+15.0/-12.5 |
ASTM A335–for Seamless Ferritic Alloy-Steel Pipe for High-Temperature Service
ASTM A519–for Seamless Carbon and Alloy Steel Mechanical Tubing
ASTM A213–for Seamless Ferritic and Austenitic Alloy-Steel Boiler, Super heater, and Heat-Exchange Tubes
Chemical Composition
|
C, % |
Mn, % |
P, % |
S, % |
Si, % |
Cr, % |
Mo, % |
|
0.05-0.15 |
0.30-0.60 |
0.025 max |
0.025 max |
0.50-1.00 |
1.00-1.50 |
0.44-0.65 |
Mechanical Properties
|
Tensile Strength, MPa |
Yield Strength, MPa |
Elongation, % |
|
415 min |
205 min |
30 min |
