ASTM A276 TP316 VS. ASTM A479 TP316 stainless steel rod
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What is ASTM A276 TP316 stainless steel round bar?
ASTM A276 TP316 round bar can be hot or cold worked and offers excellent corrosion resistance due to its high molybdenum content. Compared to 304 stainless steel, it offers better resistance to chloride environments, pitting, and crevice corrosion. ASTM A276 specifies the material's chemical composition, mechanical properties (tensile strength, yield strength), heat treatment conditions, and acceptable shapes (including round).
What is ASTM A479 TP316 forged bar?
ASTM A479 TP316 forged bar is a hot-worked stainless steel bar made from Grade 316 alloy and conforms to ASTM Standard Specification for Boiler and Pressure Vessel Bar and Shapes. The term "forged" refers to the bar being formed by hammering or pressing the hot metal, which increases its strength and refines its grain structure, making it suitable for demanding high-temperature and corrosive services.
What is the difference between A276 and A479?
ASTM A276 and ASTM A479 are both specifications for stainless steel bars, but they differ in their intended applications. A276 covers general-purpose stainless steel bars, while A479 specifically addresses bars for use in boilers and pressure vessels. A479 bars are designed to withstand higher temperatures and pressures and are often used in more critical applications.
Chemical Composition
| Property | ASTM A276 TP316 Stainless Steel Rod | ASTM A479 TP316 Stainless Steel Rod |
|---|---|---|
| Carbon (C) | ≤ 0.08% | ≤ 0.08% |
| Manganese (Mn) | 2.00% max | 2.00% max |
| Silicon (Si) | 0.75% max | 0.75% max |
| Phosphorus (P) | 0.045% max | 0.045% max |
| Sulfur (S) | 0.030% max | 0.030% max |
| Chromium (Cr) | 16.00-18.00% | 16.00-18.00% |
| Nickel (Ni) | 10.00-14.00% | 10.00-14.00% |
| Molybdenum (Mo) | 2.00-3.00% | 2.00-3.00% |
| Iron (Fe) | Balance | Balance |
Mechanical Properties
| Property | ASTM A276 TP316 Stainless Steel Rod | ASTM A479 TP316 Stainless Steel Rod |
|---|---|---|
| Tensile Strength | 70,000 psi (485 MPa) min | 70,000 psi (485 MPa) min |
| Yield Strength | 30,000 psi (205 MPa) min | 30,000 psi (205 MPa) min |
| Elongation | 40% min (in 8 inches) | 40% min (in 8 inches) |
| Hardness | Rockwell B: 90 max | Rockwell B: 90 max |
| Modulus of Elasticity | 28,000 ksi (193 GPa) | 28,000 ksi (193 GPa) |
Both grades share similar chemical compositions, but ASTM A479 TP316 is typically used for more demanding industrial applications such as in pressure vessels or high-temperature service environments. Let me know if you need further details!
Get ASTM A479 TP316 material list
How to choose?
For most commercial applications, when standard properties are sufficient, choose ASTM A276 TP316. When the bar or shape will be used in boilers, pressure vessels, or other high-temperature, high-stress applications that must meet specific ASME requirements, choose ASTM A479 TP316.
who choose us?
If you have a project requirement for 316 1.4401 stainless steel bar, we welcome your order. GNEE maintains a large inventory of popular products for you to choose from. We offer a wide range of sizes, surface finishes, and tolerances. Cold-finished stainless steel bar typically conforms to international standards such as ASTM A276, A479, or A582/A484M. Email: info@gneestainless.com
