Product Overview
ASTM A516 Grade 70 is a high-strength carbon steel plate specifically designed for welded pressure vessels, boilers, heat exchangers, and storage tanks operating under moderate and low-temperature service conditions.
It is one of the most widely used pressure vessel steel grades in global EPC engineering projects, where safety, pressure resistance, and long-term operational reliability are critical requirements.
Why ASTM A516 Grade 70 Is Trusted in Global Engineering Projects
Designed for Pressure Equipment Applications
A516 Gr70 is engineered for:
• Pressure vessels
• Boilers
• Industrial storage tanks
Ensuring safe performance under internal pressure conditions.
Excellent Fabrication Performance
• Low carbon equivalent ensures excellent weldability
• Reduced preheating requirements
• Suitable for complex welded structures
• Lower overall fabrication cost for manufacturers
High Toughness & Structural Safety
• Strong resistance to brittle fracture
• Stable performance in low and moderate temperature environments
• Reliable under dynamic and cyclic loading conditions
Consistent Mechanical Behavior
Ensures:
• Uniform batch-to-batch quality
• Predictable fabrication results
• Reduced engineering and project risk
Product Specification
|
Item |
Specification |
|
Standard |
ASTM A516 / ASME SA516 |
|
Grade |
Grade 70 |
|
Type |
Boiler & Pressure Vessel Steel Plate |
|
Thickness |
6 – 300 mm |
|
Width |
1000 – 4000 mm |
|
Length |
3000 – 12000 mm |
|
Condition |
As Rolled / Normalized / Stress Relieved |
Chemical Composition
|
Element |
Content |
|
C |
≤ 0.31% |
|
Mn |
0.79 – 1.30% |
|
P |
≤ 0.035% |
|
S |
≤ 0.035% |
|
Si |
0.13 – 0.45% |
Mechanical Properties
|
Property |
Value |
|
Tensile Strength |
485 – 620 MPa |
|
Yield Strength |
≥ 260 MPa |
|
Elongation |
17% – 23% |
|
Impact Toughness |
Optional CVN testing available |
Core Industrial Applications
Pressure Vessel Manufacturing: Storage spheres, gas separators, chemical reactor columns, and distillation towers.
Boiler & Power Generation Systems: High-pressure industrial boilers, steam generation drums, and shell heat exchangers.
Oil & Gas / Petrochemical EPC: LNG/LPG onshore storage tanks, refinery process equipment, and sour-service treatment vessels.
Heavy Engineering Components: Mining equipment structural components and high-load pressure-bearing structural fabrications.
Value-Added Processing & Pre-Fabrication Support
To reduce your workshop lead times and destination labor costs, we offer welding-ready delivery conditions:
Precision Cutting: CNC plasma, laser, and heavy oxygen-flame straight/profile cutting.
Edge Preparation: Beveling and edge milling based on your welding procedure specifications (WPS).
Surface Treatment: Shot blasting (Sa 2.5 standard) and temporary anti-rust priming.
Testing Readiness: Precision drilling or profiling based on structural engineering drawings.
Quality Inspection & Comprehensive Documentation
Every shipment is backed by a transparent traceability loop. Documentation provided includes:
• Chemical composition ladle and product analysis.
• Mechanical property reports (Tensile, Yield, Elongation).
• 100% Ultrasonic Testing (UT) complying with ASTM A435, A577, or A578 (Level A/B/C) to eliminate internal laminar defects.
• Dimensional tolerance and surface defect inspection records.
• EN 10204 3.1 / 3.2 Mill Test Certificate.
Surface Condition & Export Packaging
Surface Options:
• Black painted
• Shot blasted (Sa 2.5)
• Anti-rust oiled
• Mill finish
Export Packaging System
• Steel strip bundling reinforcement
• Waterproof plastic wrapping
• Wooden or steel frame protection
• Container loading reinforcement system
• Heat number marking for full traceability
Why Global Contractors Choose Youcheng Steel
Engineering-Grade Quality Control System
• Certified mill sourcing system
• Heat number traceability for every plate
• EN10204 3.1 / 3.2 certification available
Proven Industrial Application Experience
Our A516 Gr70 steel plates are widely supplied for:
• Refinery expansion and maintenance projects
• Power plant boiler system fabrication
• LNG storage tank construction projects
• Petrochemical pressure vessel manufacturing
• Industrial EPC contractor procurement programs
Third-Party Inspection Support
We fully support:
• SGS inspection
• Bureau Veritas (BV) inspection
• TÜV Rheinland certification
• Client-appointed inspection agencies
Procurement Risk Control System
We help global buyers reduce procurement risk through:
• Stable batch production control system
• Pre-shipment inspection verification
• Full material traceability (heat number system)
• Export-standard packaging for sea freight
• Documentation accuracy control (MTC verification)
Our Certificate
Frequently Asked Questions
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