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Introduction
ASTM A511
covers seamless stainless steel mechanical tubing intended for mechanical,
structural, and general industrial applications. These tubes are manufactured
to provide excellent corrosion resistance, dimensional accuracy, strength, and
machinability.
ASTM A511
stainless steel tubing is widely used in industries requiring precision tubing
for engineering, instrumentation, automotive, and industrial equipment
applications.
Ladhani
Metal Corporation is a manufacturer, supplier, and exporter of ASTM A511
stainless steel mechanical tubing, supplying high-quality seamless tubes for
industrial and engineering applications.
Applicable Standard
Standard
Specification: ASTM A511
Organization: ASTM International
Title: Standard Specification for Seamless Stainless Steel Mechanical Tubing
and Hollow Bar
This specification
covers seamless stainless steel tubing and hollow bars for mechanical and
industrial applications.
Forms of Supply
ASTM A511
stainless steel tubing is supplied in the following forms:
Seamless
tubes
Mechanical tubing
Hollow bars
Round tubes
Cut-to-length tubes
Supply
Condition
Cold drawn
Annealed condition
Solution annealed
Surface
Finish
Bright
finish
Polished finish
Mill finish
Pickled finish
Standard
Sizes
Outside
Diameter: 6 mm to 250 mm
Wall Thickness: 1 mm to 25 mm
Length: Up to 6 meters or as required
Grades
Covered Under ASTM A511
304
304L
316
316L
321
These grades
are austenitic stainless steels offering excellent corrosion resistance and
mechanical performance.
Chemical Composition of ASTM A511 Stainless Steel
Tubing (%)
Austenitic
Stainless Steels
|
Grade |
Carbon |
Manganese,
max |
Phosphorus,
max |
Sulfur,
max |
Silicon,
max |
Nickel |
Chromium |
Molybdenum |
Titanium |
Columbium
+ Tantalum |
Selenium |
|
MT 302 |
0.08–0.20 |
2.00 |
0.040 |
0.030 |
1.00 |
8.0–10.0 |
17.0–19.0 |
— |
— |
— |
— |
|
MT 303Se |
0.15 max |
2.00 |
0.040 |
0.040 |
1.00 |
8.0–11.0 |
17.0–19.0 |
— |
— |
— |
0.12–0.2 |
|
MT 304 |
0.08 max |
2.00 |
0.040 |
0.030 |
1.00 |
8.0–11.0 |
18.0–20.0 |
— |
— |
— |
— |
|
MT 304L |
0.035 maxᵃ |
2.00 |
0.040 |
0.030 |
1.00 |
8.0–13.0 |
18.0–20.0 |
— |
— |
— |
— |
|
MT 305 |
0.12 |
2.00 |
0.040 |
0.030 |
1.00 |
10.0–13.0 |
17.0–19.0 |
— |
— |
— |
— |
|
MT 309S |
0.08 max |
2.00 |
0.040 |
0.030 |
1.00 |
12.0–15.0 |
22.0–24.0 |
— |
— |
— |
— |
|
MT 310S |
0.08 max |
2.00 |
0.040 |
0.030 |
1.00 |
19.0–22.0 |
24.0–26.0 |
— |
— |
— |
— |
|
MT 316 |
0.08 max |
2.00 |
0.040 |
0.030 |
1.00 |
11.0–14.0 |
16.0–18.0 |
2.0–3.0 |
— |
— |
— |
|
MT 316L |
0.035 maxᵃ |
2.00 |
0.040 |
0.030 |
1.00 |
10.0–15.0 |
16.0–18.0 |
2.0–3.0 |
— |
— |
— |
|
MT 317 |
0.08 max |
2.00 |
0.040 |
0.030 |
1.00 |
11.0–14.0 |
18.0–20.0 |
3.0–4.0 |
— |
— |
— |
|
MT 321 |
0.08 max |
2.00 |
0.040 |
0.030 |
1.00 |
9.0–13.0 |
17.0–20.0 |
— |
ᵇ |
— |
— |
|
MT 347 |
0.08 max |
2.00 |
0.040 |
0.030 |
1.00 |
9.0–13.0 |
17.0–20.0 |
— |
— |
ᶜ |
— |
Notes
- ᵃ For small diameter or thin wall
tubing, where many drawing passes are required, a maximum of 0.040% carbon
is necessary in grades MT-304L and MT-316L.
- ᵇ Titanium content shall be not
less than five times the carbon content and not more than 0.60%.
- ᶜ Columbium plus tantalum content
shall be not less than ten times the carbon content and not more than
1.00%.
Martensitic
Grades
|
Grade |
Carbon,
max |
Manganese,
max |
Phosphorus,
max |
Sulfur,
max |
Silicon,
max |
Nickel |
Chromium |
Molybdenum |
Nitrogen |
Selenium |
|
MT 403 |
0.15 |
1.00 |
0.040 |
0.030 |
0.50 |
0.50 max |
11.5–13.0 |
0.60 max |
— |
— |
|
MT 410 |
0.15 |
1.00 |
0.040 |
0.030 |
1.00 |
0.50 max |
11.5–13.5 |
— |
— |
— |
|
MT 414 |
0.15 |
1.00 |
0.040 |
0.030 |
1.00 |
1.25–2.50 |
11.5–13.5 |
— |
— |
— |
|
MT 416Se |
0.15 |
1.25 |
0.060 |
0.060 |
1.00 |
0.50 max |
12.0–14.0 |
— |
— |
0.12–0.20 |
|
MT 431 |
0.20 |
1.00 |
0.040 |
0.030 |
1.00 |
1.25–2.50 |
15.0–17.0 |
— |
— |
— |
|
MT 440A |
0.60–0.75 |
1.00 |
0.040 |
0.030 |
1.00 |
— |
16.0–18.0 |
0.75 max |
— |
— |
Ferritic
Grades
|
Grade |
Carbon |
Manganese,
max |
Phosphorus,
max |
Sulfur,
max |
Silicon,
max |
Nickel |
Chromium |
Molybdenum |
Aluminum |
Copper |
Nitrogen |
|
MT 405 |
0.08 |
1.00 |
0.040 |
0.030 |
1.00 |
0.50 max |
11.5–14.5 |
— |
0.10–0.30 |
— |
— |
|
MT 429 |
0.12 |
1.00 |
0.040 |
0.030 |
1.00 |
0.50 max |
14.0–16.0 |
— |
— |
— |
— |
|
MT 430 |
0.12 |
1.00 |
0.040 |
0.030 |
1.00 |
0.50 max |
16.0–18.0 |
— |
— |
— |
— |
|
MT 443 |
0.20 |
1.00 |
0.040 |
0.030 |
1.00 |
0.50 max |
18.0–23.0 |
— |
— |
0.90–1.25 |
— |
|
MT 446-1 |
0.20 |
1.50 |
0.040 |
0.030 |
1.00 |
0.50 max |
23.0–30.0 |
— |
— |
— |
0.25 max |
|
MT 446-2ᵃ |
0.12 |
1.50 |
0.040 |
0.030 |
1.00 |
0.50 max |
23.0–30.0 |
— |
— |
— |
0.25 max |
|
29-4 |
0.010 |
0.30 |
0.025 |
0.020 |
0.20 |
0.15 max |
28.0–30.0 |
3.5–4.2 |
— |
0.15 max |
0.020 max |
|
29-4-2 |
0.010 |
0.30 |
0.025 |
0.020 |
0.20 |
2.0–2.5 |
28.0–30.0 |
3.5–4.2 |
— |
0.15 max |
0.020 maxᵇ |
Notes
- ᵃ MT446-2 is a lower carbon version
of MT446-1; it has lower tensile strength but improved ductility and
toughness.
- ᵇ Carbon plus nitrogen = 0.025 max
%.
Tensile
Requirement
|
Grade |
Tensile Strength, min, ksi (MPa) |
Yield Strength, min, ksi (MPa) |
Elongationᵇ in 2 in. or 50 mm, min, % |
|
All
austenitic steelsᶜ |
75 (517) |
30 (207) |
35 |
|
MT 403 |
60 (414) |
30 (207) |
20 |
|
MT 405 |
60 (414) |
30 (207) |
20 |
|
MT 410 |
60 (414) |
30 (207) |
20 |
|
MT 414 |
100 (689) |
65 (448) |
15 |
|
MT 416 Se |
60 (414) |
35 (241) |
20 |
|
MT 429 /
MT 430 |
60 (414) |
35 (241) |
20 |
|
MT 431 |
105 (724) |
50 (621) |
20 |
|
MT 440 A |
95 (655) |
55 (379) |
15 |
|
MT 443 |
70 (483) |
40 (276) |
20 |
|
MT 446–1 |
70 (483) |
40 (276) |
18 |
|
MT 446–2 |
65 (448) |
40 (276) |
20 |
|
29-4 |
70 (483) |
55 (379) |
20 |
|
29-4-2 |
70 (483) |
55 (379) |
20 |
Key Features of ASTM A511 Stainless Steel Mechanical
Tubing
Excellent
corrosion resistance
High dimensional accuracy
Good machinability and weldability
Smooth internal and external surface finish
Suitable for precision engineering applications
High durability and strength
Reliable performance in industrial environments
Applications of ASTM A511 Stainless Steel Tubing
ASTM A511
tubing is widely used in industries requiring precision and corrosion-resistant
tubing.
Mechanical
Engineering
• Precision mechanical components
• Hollow shafts
Automotive
Industry
• Exhaust systems
• Instrumentation tubing
Industrial
Equipment
• Hydraulic systems
• Machinery components
Chemical
& Food Industry
• Process tubing
• Hygienic equipment components
Heat Treatment
Tubing is
generally solution annealed
Heat treatment improves corrosion resistance and ductility
Cold drawing enhances dimensional accuracy and surface finish
Conclusion
ASTM A511
stainless steel mechanical tubing provides a reliable solution for precision
engineering and industrial applications. With excellent corrosion resistance,
dimensional accuracy, and mechanical properties, these seamless tubes are ideal
for demanding operating environments.
Ladhani
Metal Corporation supplies ASTM A511 stainless steel mechanical tubing in
various grades and sizes, ensuring high-quality products for automotive,
engineering, chemical, and industrial applications.
FOR REQUIREMENT OF THIS GRADE OR FOR DETAIL CONTACT US AT :-
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