ASTM A515 Grade 60 65 70 Steel Plate

A515 Steel Plate For Boiler

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ASTM A515 is a high-strength carbon-silicon steel specification designed for welded pressure vessels and industrial boilers operating in intermediate to high-temperature environments. It offers excellent toughness and comes in three grades (60, 65, 70), primarily for the oil, gas, and petrochemical industries.

 

ASTM A515, identical to ASME SA515, is the standard specification for welded carbon steel pressure vessel plates used at high temperatures in boilers and other pressure vessels. A515/S-515 vessel steel plate are divided into three grades according to their minimum tensile strength: Grade 60, Grade 65, Grade 70.

ASTM A515 boiler step plates in thicknesses up to 50 mm [2 in] are usually supplied in the rolled condition unless ordered on request.

 

Download A515 Standard Specification PDF

 

ASTM A515 Pressure Vessel Plates
Element		Gr. 60	Gr. 65	Gr. 70
C max	t≤1"	0.24	0.28	0.31
	1"< t ≤2"	0.27	0.31	0.33
	2"< t ≤4"	0.29	0.33	0.35
	4"< t ≤8"	0.31	0.33	0.35
	t>8"	0.31	0.33	0.35
Mn max	*H.A.	0.90	0.90	1.20
	*P.A.	0.98	0.98	1.30
P	max	0.025	0.025	0.025
S	max	0.025	0.025	0.025
Si	*H.A.	0.15–0.40	0.15–0.40	0.15–0.40
	*P.A.	0.13–0.45	0.13–0.45	0.13–0.45

 

 

ASTM A515	*T.S. MPa [ksi]	*Y.S. MPa [ksi]	*EL. 8" min. %	*EL. 2" min. %
Grade 60	415–550 [60–80]	≥ 220 [≥ 32]	21	25
Grade 65	450–585 [65–85]	≥ 240 [≥ 35]	19	23
Grade 70	485–620 [70–90]	≥ 260 [≥ 38]	17	21

 

Applications:

ASTM A515 steel plates are commonly used in:

Manufacturing of pressure vessels for the oil and gas industry.

Construction of boilers and heat exchangers.

Fabrication of industrial storage tanks and other pressure-sensitive equipment.

Applications where high strength and durability are required, especially in high-temperature environments.

 

Comparison with ASTM A516 Grades

For a broader perspective, we compare ASTM A515 Gr.60 with ASTM A516 grades, which are designed for moderate and lower-temperature services:

Property	A515 Grade 60	A516 Grade 55	A516 Grade 60	A516 Grade 65	A516 Grade 70
Temperature Service	Intermediate/High	Moderate/Low	Moderate/Low	Moderate/Low	Moderate/Low
Carbon Content (Max %)	0.24-0.31	0.18-0.26	0.21-0.27	0.24-0.29	0.27-0.31
Yield Strength (Min Mpa)	220	205	220	240	260
Tensile Strength (Mpa)	415-550	380-515	415-550	450-585	485-620
Elongation (Min %, 200mm)	21	27	25	23	21

ASTM A516 Grade 55: Best for low-temperature applications with high ductility.

ASTM A516 Grade 60: Matches A515 Gr 60 in strength but is optimized for lower temperatures.

ASTM A516 Grade 65: Offers higher strength, suitable for moderate conditions.

ASTM A516 Grade 70: Provides higher strength, ideal for more demanding low-temperature applications.

For high-temperature applications, ASTM A515GR.60 outperforms A516 grades due to its normalized structure and enhanced heat resistance.

 

Equivalent Steel Grades for ASTM A515

When sourcing materials globally, it is essential to understand how ASTM A515 compares to other international standards. Below are the closest equivalents based on application and mechanical properties.

ASTM A515 Grade	ASME Equivalent	EN 10028 (Europe)	DIN 17155 (Germany)	JIS G3103 (Japan)	GB 713 (China)
Grade 60	SA515 Gr. 60	P265GH	HI / HII	SB410	Q245R
Grade 65	SA515 Gr. 65	P295GH	17 Mn 4	SB450	Q300R
Grade 70	SA515 Gr. 70	P355GH	19 Mn 6	SB480	Q345R

Note: While these grades are functionally similar, always consult the specific Mill Test Certificate (MTC) and project fabrication codes to ensure full compliance with chemical and mechanical requirements.

 

Why Choose Gnee Steel for ASTM A515 Grade 65 Steel Plates?

As a specialized manufacturer and global supplier of pressure vessel steel, Gnee Steel provides industry-leading quality and service for A515 Grade 65.

1.Premium Quality & Certification: Our A515 Gr. 65 plates are fully certified to ASTM/ASME standards and supplied with EN 10204 3.1 or 3.2 MTCs. We adhere to ISO 9001 and PED (Pressure Equipment Directive) compliance.

 

2.Expertise in High-Temperature Service: We understand that A515 is designed for higher-temperature applications. Our plates feature a coarse-grain structure optimized for creep resistance and stability in boilers and steam-processing units.

 

3.Extensive Size & Thickness Range: We maintain a large inventory of A515 Grade 65 in thicknesses ranging from 6mm to over 200mm, with customizable widths and lengths to reduce your welding and fabrication waste.

 

4.Advanced In-House Testing: To ensure safety in high-pressure environments, we offer comprehensive testing, including:

Ultrasonic Testing (UT) to ASTM A435/A578.

High-Temperature Tensile Testing.

Chemical Analysis (Spectrometer).

 

5.Integrated Processing Services: Beyond supply, we provide precision CNC cutting, beveling, rolling, and surface treatment (shot blasting/priming), delivering "ready-to-fabricate" components to your site.

 

FAQ

What is the main difference between ASTM A515 and ASTM A516?

• ASTM A515 is intended for intermediate and higher-temperature service. It has a coarser grain structure which provides better resistance to "creep" at high temperatures.
• ASTM A516 is intended for moderate and lower-temperature service. It has a fine-grain structure (often normalized) to improve notch toughness and prevent brittle fracture at low temperatures

 

• A 515/A 515M and A 516/A 516M specifications

  In boiler building industry,the most common used materials are from ASTM A 516/A 516M and A 515/A 515M steel specifications.

  
  A515/A515M Standard specification for pressure vessel plates,carbon steel,for intermediate-and-higher-temperature services.This specification contains three boiler steel grades as A515 grade 70,A515 grade 65 and A515 grade 60.

  
  A516/A516M Standard specification for pressure vessel plates,carbon steel,for moderate and low temperature service.This specification contains four boiler steel grades as A516 grade 70,A516 grade 65,A516 garde 60 and A516 grade 55.

  
  When rolling these boiler steel plates (A516gr70/65/60/55,A515gr70/65/60),general requirements shall be conform to ASTM A 20/A 20M,Ultrasonic examination shall be conform to ASTM A435/A435M,A578/A578M or A577/A577M.

   

  

In the Oil & Gas industry, many high-temperature pressure vessels are also exposed to hydrogen sulfide (H2S), creating a "Sour Service" environment. Standard carbon steel can suffer from Hydrogen-Induced Cracking (HIC) in these conditions.

 

At Gnee Steel, we bridge the gap between high-temperature resistance and corrosion protection. Our ASTM A515 Grade 65 plates can be specially manufactured and tested to meet NACE MR0175 / ISO 15156 standards. By controlling the chemical composition (low sulfur and phosphorus) and performing rigorous HIC testing, we ensure that your high-temperature boilers can also withstand the most corrosive sour environments.

 

Does ASTM A515 Grade 65 meet NACE MR0175 standards?
Yes. While NACE compliance is not a standard requirement for all A515 plates, Gnee Steel's ASTM A515 Gr.65 plates are specifically tested for NACE MR0175 and HIC (Hydrogen-Induced Cracking). This ensures their suitability for sour service environments where both high-temperature stability and resistance to hydrogen-induced damage are required.

 

What is the maximum service temperature for A515 Grade 65?
ASTM A515 is typically used in steam boilers and pressure vessels operating at temperatures up to 1000°F (538°C). Beyond 800°F, specific ASME allowable stresses must be applied to account for long-term material behavior.

 

Is A515 Grade 65 weldable?
Yes, it is a weldable carbon steel grade. It has excellent weldability using standard industrial methods. For thicker plates, Pre-heating and Post-Weld Heat Treatment (PWHT) are strongly recommended to ensure structural integrity and relieve internal stresses.

 

How does Gnee Steel ensure the quality of A515 Grade 65 plates for critical projects?
Every plate undergoes a strict quality control protocol, including:

Chemical Analysis: Ensuring low impurities for better weldability and NACE compliance.

Mechanical Testing: Verifying tensile, yield, and elongation properties.

Ultrasonic Testing (UT): Detecting any internal laminations or defects.

Specialized Corrosion Testing: HIC and SSCC testing for projects requiring sour service suitability.

 

Summary of Equivalent Grades for ASTM A515 Grade 65

Standard	Grade Equivalent
ASME	SA515 Grade 65
EN 10028	P295GH
DIN 17155	17 Mn 4
JIS G3103	SB450
GB 713	Q300R

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We have excellent after-sales service. If you have any questions about A515 Steel Plate For Boiler, you can contact us and we will reply to you within two hours.

 

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