Why A516 Gr 70 Is the First Choice for Boiler Steel Plates
If you’re wondering which steel grade is most preferred for boiler manufacturing, the answer is clear: ASTM A516 Grade 70.
Globally recognized as the “Boiler Quality (BQ) Steel Plate”
Used in thermal plants, refineries, LNG storage, and industrial boilers
At Hindustan Steel Corporation, A516 Gr 70 is one of our highest-selling boiler steel grades for domestic and export markets.
Why Grade Selection Matters in Structural Projects
Correct grade = Cost efficiency + Performance + Safety
Factors to consider:
- Yield strength
- Weldability
- Impact toughness
- Availability & cost
What Makes A516 Gr 70 Suitable for Boiler Construction?
Key reasons why industries choose A516 Gr 70 for boilers:
- Excellent pressure handling capacity
- Low-temperature impact toughness
- Good weldability for thick-walled pressure vessels
- Normalized delivery condition for consistent performance
- Conformance to ASME and ASTM codes (A516/SA516)
Typical Applications of A516 Gr 70 Boiler Plates
- Industrial Boilers – Steam and water storage under high pressure
- Heat Exchangers – Shell sections
- Storage Tanks – Low-temp pressure storage
- Autoclaves – High-pressure applications
- Refinery Process Vessels – Under sour service conditions
- Also suitable for API and ASME Section VIII pressure applications
Mechanical Properties of A516 Gr 70 for Boilers
| Property | Value |
|---|---|
| Yield Strength | Min 260 MPa |
| Tensile Strength | 485–620 MPa |
| Elongation | Min 17% |
| Impact Test | CVN at -20°C |
| Heat Treatment | Normalized (N) condition |
For critical projects, we also supply HIC and NACE tested A516 Gr 70 plates
ASTM & ASME Standards Compliance
ASTM Standard: ASTM A516
ASME Standard: SA 516
Common Grade Supplied: Grade 70 (most popular for boilers)
Also available:
Grade 60
Dual Certified Gr 60/70 plates
Thickness Range for Boiler Plate Applications
| Parameter | Range |
|---|---|
| Thickness | 6 mm to 120 mm |
| Width | Up to 3000 mm |
| Length | Up to 12000 mm |
| Cut-to-Size | ✅ Yes |
| Bevel Edging | ✅ Yes |
We stock common boiler thicknesses like 8 mm, 10 mm, 16 mm, 25 mm, 40 mm, and 50 mm
Heat Treatment & Impact Testing
- Supplied in Normalized condition for consistent grain structure and improved toughness.
- Impact tested at -20°C as per ASTM / ASME code requirements.
- HIC, NACE, and SSC testing available for sour service applications.
Weldability & Fabrication Performance
- Excellent weldability with SMAW, SAW, TIG, and MIG processes.
- Suitable for heavy wall welding
- Low hydrogen welding practices recommended
- PWHT (Post Weld Heat Treatment) may be needed for certain thicknesses.
- JIS G3101 SS400 – Popular for General Structural Use
Why Source A516 Gr 70 Boiler Plates from Hindustan Steel Corporation?
Ready stock in Mumbai for immediate dispatch
Cut-to-length and CNC profiling services
MTC with impact, tensile, and chemical analysis
Third-party inspection clearance (SGS, TUV, Lloyd’s)
Export support for Middle East, Africa, USA, and Southeast Asia
Export Availability for A516 Gr 70 Boiler Plates
We export A516 Gr 70 plates for boiler projects to:
- Saudi Arabia
- UAE
- South Africa
- Vietnam
- USA
- Qatar
CIF, FOB, and Ex-Works options available.
Buyer Tip: How to Specify A516 Gr 70 for Boiler Orders
When sending RFQ, include:
- Grade: A516 Gr 70 / SA516 Gr 70
- Thickness and dimensions
- Impact test requirement (Y/N)
- HIC/NACE requirement (Y/N)
- UT Level II/III (Y/N)
Certifications and Testing Support
We provide:
- EN 10204 3.1 MTC
- Impact test reports
- HIC / NACE / SSC test reports (if required)
- Third-party inspection approvals
FAQs – Top Structural Steel Plate Grades
Is A516 Gr 70 impact tested?
Yes, at -20°C (Charpy V-Notch Test)
What is the yield strength of A516 Gr 70?
Min 260 MPa
What thickness range is available for boiler use?
6 mm to 120 mm
Is PWHT required for A516 Gr 70?
For certain thicknesses, yes.
What is the typical delivery time?
2–3 weeks for standard stock sizes.
What are the welding guidelines for A516 Gr 70?
Use low hydrogen welding methods
Where can I get a quote for A516 Gr 70 boiler plates?
WhatsApp, Email, or Call us for a fast quote.
Contact Hindustan Steel Corporation today
Ask for:
- CIF/FOB quote for boiler projects
- Ready stock thickness list
- Third-party test clearance details