SA516GR70 Steel – High-Quality Steel for Boilers and Pressure Vessels
SA516GR70 Steel Plate
Thickness: 6mm – 200mm | Width up to 4000mm
- StandardASME SA516 / SA516M, ASTM A516/A516M
- Tensile Strength485 – 620 MPa (70 – 90 ksi)
- Yield Strength≥ 260 MPa (38 ksi)
- WeldabilityExcellent, low carbon equivalent
- Corrosion ResistanceGood for chemical & petroleum
- CertificationsEN 10204 3.2, 3.1; ABS, BV, LR, PED
SA516 GR70 is a high-strength carbon steel material widely used in the manufacturing of boilers and pressure vessels. It follows the American steel standard (ASME), where SA516 GR70 represents the steel grade and strength level. The "70" in SA516 GR70 indicates that the steel has a minimum tensile strength of 70 ksi (thousand pounds per square inch), which is approximately 485 MPa. This steel is known for its excellent strength, toughness, and corrosion resistance, making it ideal for high-temperature, high-pressure environments.
Excellent Strength & Toughness
Withstands high pressure and temperature; ideal for steam, liquid, and gas equipment.
Good Corrosion Resistance
Suitable for chemical & petroleum industries; extends equipment life.
Good Weldability
Supports various welding methods, meeting diverse manufacturing needs.
High-Temperature Performance
Resists high temperatures; widely used in boilers, pressure vessels, and heat exchangers.
| Element | C | Si | Mn | P | S |
|---|---|---|---|---|---|
| Heat Analysis | ≤0.28 | 0.15-0.40 | 0.85-1.20 | ≤0.035 | ≤0.035 |
| Product Analysis | ≤0.28 | 0.15-0.45 | 0.79 - 1.30 | ≤0.035 | 0.003 |
Carbon (C) ≤0.28%
Provides strength and hardness. Controlled to balance strength and weldability. Lower carbon improves toughness and weldability.
Silicon (Si) 0.15-0.40%
Deoxidizer during steelmaking; strengthens ferrite. Content limited to maintain good weldability and toughness.
Manganese (Mn) 0.85-1.20%
Improves strength and toughness by solid solution strengthening and grain refinement. Also acts as a deoxidizer.
Phosphorus (P) ≤0.035%
Impurity element; causes cold brittleness. Strictly controlled to ensure low-temperature toughness and weldability.
Sulfur (S) ≤0.035%
Impurity element; leads to hot shortness and reduces ductility. Limited to improve weldability and impact properties.
| Property | Value | Notes |
|---|---|---|
| Tensile Strength (MPa) | 485 – 620 | |
| Yield Strength (MPa) | ≥ 260 | 0.2% offset method |
| Elongation (8 in. or 200 mm) | ≥ 17% | Per A20/A20M |
| Elongation (2 in. or 50 mm) | ≥ 21% | Per A20/A20M |
Boiler Manufacturing
Boiler shells, pipes, and high-temperature components.
Pressure Vessels
Chemical plants, oil refineries, natural gas processing.
Oil & Gas Industry
Pipelines, storage tanks for corrosive & high-strength needs.
Chemical Equipment
Reactors, distillation columns, heat exchangers.
Choosing SA516GR70 steel means selecting a material with excellent strength, corrosion resistance, and high-temperature stability. It withstands extreme high-pressure and high-temperature environments while maintaining structural stability over long periods of use. This results in lower maintenance costs and extended equipment life. Whether for boilers, pressure vessels, or heavy-duty chemical industry equipment, SA516 GR70 is an ideal choice.
As a high-quality steel supplier, we are committed to providing SA516 GR70 steel that meets ASME SA516 standards, ensuring that every batch of material adheres to strict industry requirements. We offer a variety of specifications and sizes of SA516 GR70 steel plates to meet custom needs, along with professional after-sales service to ensure you have a worry-free experience.
| Thickness (mm) | Width (mm) | Length (mm) | Delivery Condition |
|---|---|---|---|
| 6 – 30 | 2000 / 2200 / 2500 | 10000 / 10500 / 11000 / 12000 | Hot Rolled |
| 12 – 50 | 2000 / 2200 / 2500 | 10000 / 10500 / 11000 / 12000 | Normalizing |
| 50 – 150 | up to 3200 | up to 15000 | Normalized (upon request) |
For other dimensions or special requirements (HIC, NDT, impact test), please inquire. Click SA516GR70 in stock to visit our online inventory.
1. What is SA-516 Gr.70?
SA-516 Gr.70 is a carbon-manganese steel plate grade under ASME SA516 specification, designed for moderate and low-temperature pressure vessels. It is widely used in chemical, petroleum, natural gas, and power boilers.
2. What do SA, 516, and Gr.70 stand for?
SA: ASME material specification; 516: specific designation for carbon steel plates for moderate/lower-temperature pressure vessels; Gr.70: minimum tensile strength 70 ksi (~485 MPa).
3. Main chemical composition?
Carbon ≤0.28%, Manganese 0.85-1.20%, Silicon 0.15-0.40%, Phosphorus ≤0.035%, Sulfur ≤0.035%.
4. What are the different grades of SA-516 Gr.70?
Common variants: SA-516 Gr.70 (standard), SA-516 Gr.70 HIC (hydrogen induced cracking resistant), and SA-516 Gr.70 Normalized (improved low-temperature toughness).
5. Mechanical properties?
Yield ≥260 MPa, Tensile 485-620 MPa, Elongation ≥21% (2 in.) or ≥17% (8 in.). Impact energy (if specified) typically 27J at -20°C or -46°C.
6. Delivery conditions?
As-rolled, normalized, or normalized and tempered. Normalized is most common for fine grain and guaranteed impact properties.
7. Where is it used?
Petroleum refining equipment, liquefied gas storage tanks, boiler steam drums, chemical reactor shells, heat exchangers.
8. How is its weldability?
Good weldability due to low carbon equivalent. Preheating may be required for thick plates; use low-hydrogen consumables.
9. Which Chinese grade corresponds?
Often compared to Q345R, but they are not direct equivalents. Always check specific requirements.
10. What to specify when ordering?
Standard (ASME SA516 Gr.70), delivery condition (normalized), impact test temperature (if required), special tests (HIC, UT), and dimensions.
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Our procurement specialists will respond within 24 hours. We provide mill certificates, third-party inspections, and custom cutting.