What is ASTM A479 material?
ASTM A479/A479M Standard Specification for Stainless Steel Bars and Shapes for Use in Boilers and Other Pressure Vessels is a material standard defining the requirements for stainless steel bars (rounds, squares, hexagons) and shapes (angles, tees, channels) used specifically for boilers and pressure vessels, specifying chemical composition, mechanical properties, heat treatments, and testing for various austenitic, ferritic, and duplex grades.
ASTM A479 round bar
|
Round Bar Type |
Hot-forging, Hot Rolled, Cold Drawn, Bright Finish and Black Finsh Round Bar |
|
Standard |
JIS, AISI, ASTM, GB, BS, DIN, EN |
|
Diameter |
2-350mm |
|
Length(m) |
Random length 3-6m or fixed length or as per request. |
|
Delivery condition |
Hot Forging/ Hot-rolled+Annealing/Normalizing/ Tempering/ Quenching and Tempering/ Solution/ Aging/ Slow Cooling |
|
Tolerance |
+/-0.2mm |
|
Surface |
Bright Finish, Black Finish, Grinding Finishe, Roughing Finish. |
|
Certificate |
ISO9001m, ROHS, MTC or do a test according to clients' requirements. |
ASTM A479 Chemical Composition
| C | Si | Mn | S | P | Ni (min) | Cr (min) | N | |
|---|---|---|---|---|---|---|---|---|
| A479 304 | 0.07 | 0.75 | 2.0 | 0.03 | 0.045 | 8.0 : 10.5 | 18.0 : 20.0 | - |
| A479 304L | 0.03 | 0.75 | 2.0 | 0.03 | 0.045 | 8.0 : 12.0 | 18.0 : 20.0 | 0.10 |
ASTM A479 Type 316 Mechanical Properties
| Grade | Tensile Stress (MPa) min |
Yield Stress 0.2% Proof min |
min Elong (% in 50mm) |
Hardness | |
| Rockwell B max | max Brinell | ||||
| ASTM A479 Gr 304 | 515 | 205 MPa | 40 % | 92 HR B | 201 HB |
| ASTM A479 Gr 304L | 485 | 170 MPa | 40 % | 92 HR B | 201 HB |
| ASTM A479 Gr 304H | 515 | 205 MPa | 40 % | 92 HR B | 201 HB |
| ASTM A479 Gr 316 | 515 | 205 MPa | 40 % | 95 HR B | 217 HB |
| ASTM A479 Gr 316L | 485 | 170 MPa | 40 % | 95 HR B | 217 HB |
| ASTM A479 Gr 316H | 515 | 205 MPa | 40 % | 95 HR B | 217 HB |
Stainless Steel Bar Specifications
| ASTM A479 | This specification encompasses cold-finished or hot-finished bars, including rounds, squares, and hexagons, and hot-rolled or extruded shapes, such as angles, tees, and channels in the more commonly used types of stainless steels. |
| ASTM A479 | This specification includes cold and hot finished stainless steel bars, including rounds, squares, and hexagons, and hot-rolled or extruded shapes such as angles, tees, and channels. |
| ASTM A484 | This specification includes wrought stainless steel bars, shapes, forgings, and billets or other semi-finished materials, except wire, for forging. The materials are available in four types of conditions. |
| ASTM A582 | This specification includes cold or hot finished bars, which are suitable for machining processes. This specification includes rounds, squares, and hexagons, from common types of stainless free-machining steels. |
| ASTM B473 | This specification includes nickel alloy bar & wire, which can be produced in a solution-annealed condition, stabilized-annealed condition, or annealed condition. |
Manufacturer of ASTM A479 Bar for Pressure Vessel and Boilers
| Round Bar, ASTM A479 GR 316/ 316L, Size 16mm dia | 568/kg |
| Round Bar, ASTM A479 GR 304/ 304L, Size 12.7mm dia | 538/kg |
What is the difference between ASTM A276 and ASTM A479?
The primary difference between ASTM A276 and A479 is that, A276 defers bars for reforging and free machining grades whereas A479 is silent and thus, they are presumed to not be covered. The ASTM A479 materials are specifically used in pressure vessels and boiler applications.
GNEE is a reliable supplier of ASTM A479 round bars, offering 304, 304L, 316, and 316L round bars with diameters typically ranging from Ø6 mm to Ø450 mm, and available in solution annealed or solution annealed and aged conditions.
All round bars are manufactured according to ASTM A479 and ASTM A276 standards and can be supplied with EN 10204 3.1 certificates.
GNEE offers various product forms, such as hot-rolled bars, forged bars, peeled bars, polished bars, and cut-to-length bars, to meet different processing and performance requirements.
For transportation and packaging, the round bars are protected with anti-rust oil, plastic wrapping, and packaged in seaworthy wooden crates or steel strapping.
