Description: BBN steel is a well-known steel manufacturer and service provider in China, ASTM A516 Grade 70 steel is our superior product, we are favored by customers with high quality, competitive price and excellent service
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Mainstream Pressure Vessel Steel Series (Gr.55 / 60 / 65 / 70) | 510–650 N/mm² Tensile Strength | ≥335 N/mm² Yield Strength | Reliable Notch Toughness for Moderate & Low-Temperature Service | MTC, EN 10204 3.1, Third-Party Inspection
Balanced for Pressure DutyHigh-strength low-alloy medium carbon steel balancing outstanding structural strength, reliable weldability and excellent notch toughness.
Notch Toughness After WeldingDesigned for moderate & low-temperature service — retains stable notch toughness through welding and fabrication.
Full-Size Stock & FabricationBulk wholesale, non-standard dimension cutting and one-stop fabrication support for global industrial clients.
01Product Overview & Specifications
ASTM A516 is a mainstream carbon steel plate series dedicated for pressure vessel manufacturing, covering Grade 55, 60, 65 and 70, with Grade 70 (A516-70) being the most widely adopted option, also recognized as ASME SA516-70.
A516-70 is high-strength low-alloy medium carbon steel, balancing outstanding structural strength, reliable weldability and excellent notch toughness. Designed for moderate & low-temperature operating scenarios, it retains stable notch toughness after welding procedures, perfectly matching the strict manufacturing standards of boilers, oil tanks, oil, gas and petrochemical facilities.
Item
Specification Details
Steel Grade
ASTM A516 Grade 70 (ASME SA516-70)
Executive Standard
ASTM A516 / ASME SA516
Plate Type
Hot rolled pressure vessel carbon steel plate
Thickness Range
8mm – 120mm full range available
Width Range
1500mm – 3800mm
Length Range
3000mm – 15000mmcustom sizes negotiable
Core Advantage
Balanced strength, weldability and notch toughness, stable performance at medium & low temperatures
The A516 series is designated by minimum tensile strength level — Grade 70 is the most widely adopted option for pressure-bearing fabrication.
Grade
Tensile Strength (ksi)
Remarks
Grade 55
55 – 75
Lower strength level, for lighter pressure duty
Grade 60
60 – 80
General pressure vessel application
Grade 65
65 – 85
Higher strength pressure components
Grade 70
70 – 90
Most widely adopted — also recognized as ASME SA516-70
International equivalent grades for cross-standard material matching:
Standard System
Equivalent Grade
European EN Standard
P355GH
Chinese GB Standard
Q345R
Note: Equivalent grades match A516 Grade 70 in general strength level and weldability, yet differences exist in chemical limits, impact requirements and heat treatment conditions. For pressure-bearing equipment, always verify the design code and project specification before cross-standard replacement.
03Chemical Composition
Typical chemical composition of ASTM A516 Grade 70 (% by weight) — balanced medium-carbon low-alloy design for strength, weldability and notch toughness.
Composition
Percentage %
Composition
Percentage %
C (Carbon)
0.10 – 0.22
Cu (Copper)
0.30
Si (Silicon)
0.60
Ni (Nickel)
0.30
Mn (Manganese)
1.00 – 1.70
Mo (Molybdenum)
0.08
P (Phosphorus)
0.03
Nb (Niobium)
0.01
S (Sulfur)
0.03
Ti (Titanium)
0.03
Al (Aluminium)
0.02
V (Vanadium)
0.02
Cr (Chromium)
0.30
—
—
Note: Values above are typical / maximum limits for A516 Grade 70. The exact heat analysis of each plate is stated in its Mill Test Certificate (MTC / EN 10204 3.1) supplied with delivery.
04Mechanical Properties
Room-temperature mechanical properties of A516 Grade 70 — the strength level that makes it the industry's most popular pressure vessel plate.
510–650Tensile StrengthN/mm² (MPa)
≥335Min. Yield StressN/mm² (MPa)
8–120 mmThickness CoverageFull range in stock
Gr.70Most Adopted GradeAlso ASME SA516-70
Properties
Value
Tensile Strength (N/mm²)
510 – 650
Yield Stress / min (N/mm²)
335
Plate Type
Hot rolled pressure vessel carbon steel plate
Service Characteristic
Stable notch toughness at moderate & low temperature, retained after welding
Note: A516 Grade 70 is tailored for pressure-bearing structural fabrication. For outdoor humid or corrosive operating environments, proper surface anti-corrosion coating treatment is recommended to extend service life.
05Typical Application Fields
From boiler shells to petrochemical reactors — A516 Grade 70 serves wherever pressure, temperature and weldability must all be satisfied.
Energy Equipment
Industrial boiler shells and internal boiler structural parts requiring stable strength under pressure.
Petrochemical
Oil / gas storage tanks, pressure reaction vessels and supporting facility containers.
General Manufacturing
Medium-low temperature pressure containers and industrial fluid storage equipment.
06Wholesale Supply & Fabrication Service
Full-size stocks, complete inspection certificates and one-stop fabrication support — from plate to finished pressure component.
1
Full-Size Stock
A516 Grade 70 plates 8–120mm in stock, shipped within 3–7 days.
Bulk wholesale and non-standard dimension cutting per client drawings
Custom cutting, bending, welding, precision machining and surface treatment
MTC, EN 10204 3.1 certification and third-party inspection supported
Get Your ASTM A516 Grade 70 Quotation Now
Send us your thickness, width & length (or part drawings), quantity and processing requirements. We will reply with stock status, transparent price, delivery time and complete certification documents within 24 hours.
BBN Steel has established a complete set of production and supplier management system processes to ensure the improvement of product quality and better service to users.
Production Control
BBN Steel has established a complete production quality control process to ensure every link from research and development to mass production.
Supplier management
Our supplier selection will consider factors such as health and safety, ethics, environmental protection, price and quality to better serve customers.
Certification & Patent
We have successively won various international authoritative certifications, GB /T19001-ISO9001: 2000 quality management system was implemented.
After sales service
We provide booking space, shipping tracking service and after-sales service, we will always be first-class products and perfect pre-sale and after-sales service.
Get in Touch
Welcome to contact us through online consulting, emails and hotline if you are interested in our company or products. Our staff will reply you within 24 hours.
Address: HIGH-TECH DEVELOPMENT ZONE, ZHENGZHOU, CHINA
