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ASME SA179 Heat Exchanger Tube Low Carbon Steel Seamless U Bend Tube
ASTM A179/ASME SA179 Tubes shall be made by the seamless process and shall be cold drawn. This Tube is mostly used in heat exchangers , oil and gas plants, chemical and petrochemical plants, refineries, power plants and renewable energy plants. Low fin tubes can be supplied in the form of U bends. Seamless cold-drawn tube for tubular heat exchangers, condensers, and similar heat transfer apparatus.
Information should be confirmed:
1. Standard and the name of material: ASTM A179 / ASME SA 179
seamless tubes.
2. Manufacturing types in cold drawn
3. Quantity in meters, feet, or pieces.
4. Size including Diameters and minimum wall thickness
5. Length per pieces (Random or fixed length shall be specified)
A179 Chemistry Composition:
C, % | Mn, % | P, % | S, % |
0.06-0.18 | 0.27-0.63 | 0.035 max | 0.035 max |
A179 Mechanical Properties:
Tensile Strength, MPa | Yield Strength, MPa | Elongation, % | Hardness, HRB |
325 min | 180 min | 35 min | 72 max |
A179 Outside Diameter & Tolerance
| Outside Diameter, mm | Tolerance, mm |
| 3.2≤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 | ±0.38 |
A179 Wall thickness & Tolerance
| Outside Diamter, mm | Tolerance, % |
| 3.2≤OD＜38.1 | +20/-0 |
| 38.1≤OD≤76.2 | +22/-0 |
| Standard | Steel grade | Tensile(MPa) | Yield(MPa) | Elongate(%) | Hardenss |
| 20MnG | 20MnG | ≥415 | ≥240 | ≥22 | |
| 25MnG | 25MnG | ≥485 | ≥275 | ≥20 | |
| 15CrMoG | 15CrMoG | 440～640 | ≥235 | ≥21 | |
| 12Cr2MoG | 12Cr2MoG | 450～600 | ≥280 | ≥20 | |
| 12Cr1MoVG | 12Cr1MoVG | 470～640 | ≥255 | ≥21 | |
| 12Cr2MoWVTiB | 12Cr2MoWVTiB | 540～735 | ≥345 | ≥18 | |
| 10Cr9Mo1VNb | 10Cr9Mo1VNb | ≥585 | ≥415 | ≥20 | |
| ASME SA210 | SA210A-1 | ≥415 | ≥255 | ≥30 | ≤143HB |
| SA210C | SA210C | ≥485 | ≥275 | ≥30 | ≤179HB |
| ASME SA213 | SA213 T11 | ≥415 | ≥205 | ≥30 | ≤163HB |
| SA213 T12 | SA213 T12 | ≥415 | ≥220 | ≥30 | ≤163HB |
| SA213 T22 | SA213 T22 | ≥415 | ≥205 | ≥30 | ≤163HB |
| SA213 T23 | SA213 T23 | ≥510 | ≥400 | ≥20 | ≤220HB |
| SA213 T91 | SA213 T91 | ≥585 | ≥415 | ≥20 | ≤250HB |
| SA213 T92 | SA213 T92 | ≥620 | ≥440 | ≥20 | ≤250HB |
| DIN17175 | ST45.8/Ⅲ | 410～530 | ≥255 | ≥21 | / |
| 15Mo3 | 15Mo3 | 450～600 | ≥270 | ≥22 | |
| 13CrMo44 | 13CrMo44 | 440～590 | ≥290 | ≥22 | |
| 10CrMo910 | 10CrMo910 | 480～630 | ≥280 | ≥20 |
A179 black steel pipe minimum carbon content is 0.06%. The seamless steel tube minimum tensile strength of 325MPa, yield strength of 180MPa.The minimum elongation of A179 seamless pipe is 20%.
ASTM A179 (ASME SA179) cold drawn steel tube
This is an effective way of metal corrosion, the use of the main
features are the following:
1. ASTM A179 cold drawn seamless pipe manufacturers with thick
dense dense zinc layer covered in the cold drawn seamless tube
surface, it can avoid cold drawn seamless tube matrix and any
contact with the corrosion solution to protect the steel matrix
from corrosion. In the general atmosphere, the surface of the zinc
layer to form a layer of thin and dense zinc oxide surface, it is
difficult to dissolve in water, so the steel matrix plays a
protective role. If zinc oxide and other components of the
atmosphere produce insoluble zinc salt, the anti-corrosion effect
is more desirable.
2. With iron - zinc alloy layer, combined with dense, and with the
unique anti-corrosion in the marine atmosphere and atmospheric
atmosphere.
3. ASTM A179 cold drawn seamless pipe with a strong wear resistance
due to the combination of solid, zinc - iron miscible.
4. Since zinc has good ductility, its alloy layer and steel base
attached to a solid, so hot-rolled parts can be cold, rolling,
drawing, bending and other molding without damage to the coating.
5. Hot-dip galvanized structural steel pipe, the equivalent of an
annealing treatment, can effectively improve the mechanical
properties of steel matrix to eliminate the steel forming welding
stress, is conducive to the steel structure for turning.
6. The surface of cold drawn seamless pipe after hot galvanized is
bright and beautiful.
7. Pure zinc layer is the most hot galvanized layer of galvanized
layer, its nature is basically close to pure zinc, with ductility,
so it is full of flexibility.
Applications:
