A516 Grade 70 for Heat Exchanger Steel Plate
Products Description
ASTM A516 Grade 70 is a carbon steel plate specification, commonly used in the fabrication of pressure vessels and boilers, particularly for applications involving moderate to lower temperatures and high pressures. It's known for its excellent strength, weldability, and notch toughness.
Mechanical Properties of ASTM A516 Grade 70
| Description | Grade 70 |
|---|---|
| Tensile strength (ksi) | 70-90 |
| Tensile strength (MPa) | 485-620 |
| Yield strength (ksi) | 38 |
| Yield strength (MPa) | 260 |
| Elongation in 200mm (min)(%) | 17 |
| Elongation in 50mm (min) (%) | 21 |
| Thickness (max)(mm) | 205 |
Chemical Composition of ASTM A516 Grade 70
| Carbon (C) | % |
| 12.5mm or less 12.5 - 50mm 50 - 100mm 100 - 200mm > 200mm |
0.27 0.28 0.30 0.31 0.31 |
Manganese (Mn) |
% |
| 12.5mm or less • Heat Analysis : • Product Analysis : Over 12.5mm • Heat Analysis : • Product Analysis : |
0.85-1.20 0.79-1.30 0.85-1.20 0.79-1.30 |
Phosphorus (P) |
% |
| (max) | 0.035 |
Sulphur (S) |
% |
| (max) | 0.035 |
Silicon (Si) |
% |
| • Heat Analysis : • Product Analysis : |
0.15-0.40 0.13-0.45 |
What is the difference between A515 GR 70 and A516 GR 70?
Standard Purpose
A515 Grade 70: Used for pressure vessels in medium-to-high temperature environments(e.g., boilers, steam storage tanks), typically with non-corrosive or weakly corrosive media
A516 Grade 70: Designed for low-to-medium temperature environments, especially for pressure vessels with corrosive media(e.g., sulfur-containing crude oil, acidic gases), emphasizing resistance to hydrogen-induced cracking (HIC) and sulfide stress corrosion (SSC).
Typical Applications
A515 Grade 70: Power plant boiler drums, non-corrosive media storage tanks, heat exchanger shells.
A516 Grade 70: Refinery hydroprocessing units, natural gas treatment equipment, sulfur-containing crude oil storage vessels.
Core Design Objective
A515 Grade 70: Medium-to-high temperature strength stability
A516 Grade 70: Crack resistance (HIC/SSC) + toughness in corrosive environments
Media Compatibility
A515 Grade 70: Non-corrosive/weakly corrosive media (e.g., clean water, steam)
A516 Grade 70: Corrosive media (e.g., H₂S/CO₂-containing oil and gas)
Temperature Range
A515 Grade 70: Higher temperature (≤427°C)
A516 Grade 70: Broader temperature range (low-to-medium temperature, ≤343°C)
Cost
A515 Grade 70: Lower (relaxed compositional requirements)
A516 Grade 70: Higher (strict impurity control, requires additional impact testing)
Global Equivalents
EN 10028-3: P355GH
JIS G3115: SPV490
ISO 9328-2: P355GH
GB/T 713: Q345R
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