ASTM A302/ASME SA302 Gr A/B/C/D Alloy Boiler Plate Manufacturer

Nov 10, 2025 Leave a message

ASTM-A302-A302M.pdf

ASTM A302/A302M

 

 

A302 steel plate is a type of alloy steel specified by ASTM A302/A302M, designed for welded boilers and pressure vessels. It is a manganese-molybdenum or manganese-molybdenum-nickel steel available in four grades (A, B, C, and D) with varying strength levels. It is commonly used in the oil, gas, and power generation industries for equipment like heat exchangers, storage tanks, and reactors.

 

  • ASTM A302 Chemical Composition

ASTM A302 Chemical Composition
Steel Grade The Element Max (%)
C Si Mn P S Mo Ni
A302 Grade A 0.20-0.25 0.13–0.45 0.87–1.41 0,035 0,035 0.41–0.64  
A302 Grade B 0.20-0.25 0.13-0.45 1.07-1.62 0.035 0.035 0.41-0.64  
A302 Grade C 0.20-0.25 0.13-0.45 1.07-1.62 0.035 0.035 0.41-0.64 0.37-0.73
A302 Grade D 0.20-0.25 0.13-0.45 1.07-1.62 0.035 0.035 0.41-0.64 0.67-1.03

 

  • ASTM A302 Mechanical Property:

Steel Grade   ASTM A302 Mechanical Property
Thickness Yield Tensile Elongation
A302 Grade A mm Min Mpa Mpa Min %
6-50 310 515-655 19%
50-200 310 515-655 15%
A302 Grade B 6-50 345 Mpa 550-690 Mpa 18%
50-200 345 Mpa 550-690 Mpa 15%
A302 Grade C 6-50 50 [345] 80-100kis [550-690]Mpa 17%
50-200 20%

 

  • ASTM A302 Equivalent steel grade:

Steel Grade Europe Germany France Italy U.K.
ASTM A302 Gr. A,B 14Cr Mo 45 13 Cr Mo 44 15 CD 4.05 14 Cr Mo 46 620 Gr.27,31

 

ASME SA302/SA302M

 

 

ASME SA302 is an alloy steel plate standard for manufacturing pressure vessels and boilers. These plates are used in various high-pressure applications, such as reactors, storage tanks, and power plant equipment. The "SA" designation means it is a standard adopted by the American Society of Mechanical Engineers (ASME) for its Boiler and Pressure Vessel Code.

Material: It is an alloy steel, with grades A, B, C, and D that are manganese-molybdenum and manganese-molybdenum-nickel steels.

 

  • SA302 Grade A Chemical Composition

SA302 Grade A Chemical Composition

25mm or under

0.2

Heat Analysis

0.95-1.30

Heat Analysis

0.15-0.40

All thick

0.035

25-50mm

0.23

Product Analysis

0.87-1.41

Product Analysis

0.13-0.45

over 50mm

0.25

 

 

 

 

 

 

Molybdenum max

%

Nickel max

%

Phosphorus

%

 

 

Heat Analysis

0.45-0.60

Heat Analysis

…

All thick

0.035

 

 

Product Analysis

0.41-0.64

Product Analysis

…

 

  • Mechanical Property of SA302 Grade A steel plate

Mechanical Property of SA302 Grade A steel plate

SA302 Grade A

Tensile strength, kis [MPa]

75-95 [515-655]

Yield strength, min, kis [MPa]

45 [310]

Elongation in 8 in. [200 mm], min, %

15

Elongation in 2 in. [50 mm], min, %

19

Shipbuilding steel plate| Alloy steel plates| High strength plate| Carbon steel plate| Stainless steel plate

 

  • Equivalent steel grade of SA302 Grade A

Equivalent steel grade of SA302 Grade A

Europe

Belgium

Germany

France

Italy

UK

India

Japan

 

 

 

 

 

Gr.27,31

 

 

 

Request A Quote

 

If you want to learn more about GNEE's products, you can send an email to alloy@gneesteelgroup.com. We are more than happy to assist you.

 

What material is SA302?

SA302 Grade B steel plates standard specification for pressure vessel plates in alloy steel, manganese molybdenum and manganese-molybdenum-nickel. SA302 Grade B steel plate shall be normally supplied in the as-rolled condition. Plates may be ordered normalized or stress relieved, or both.

 

What is the equivalent of SA302 Grade B?

ASME SA302GRB steel plate equal to 15CrMoR steel plate
SA302GrB steel plate is one kind Molybdenum alloy steels in ASME SA302/SA302M,SA302 Grade B is totally equal to A302 Grade B in ASTM A302/A302 steel specification.

 

 

ASME SA302/SA302M

ASME SA302/SA302M

 

Grades Of Pressure Vessel Plates Supplied By GNEE
ASTM ASTM A202/A202M ASTM A202 Grade A ASTM A202 Grade B    
ASTM A203/A203M ASTM A203 Grade A ASTM A203 Grade B ASTM A203 Grade D ASTM A203 Grade E
ASTM A203 Grade F      
ASTM A204/A204M ASTM A204 Grade A ASTM A204 Grade B ASTM A204 Grade C  
ASTM A285/A285M ASTM A285 Grade A ASTM A285 Grade B ASTM A285 Grade C  
ASTM A299/A299M ASTM A299 Grade A ASTM A299 Grade B    
ASTM A302/A302M ASTM A302 Grade A ASTM A302 Grade B ASTM A302 Grade C ASTM A302 Grade D
ASTM A387/A387M ASTM A387 Grade 5 Class1 ASTM A387 Grade 5 Class2 ASTM A387 Grade 11 Class1 ASTM A387 Grade 11 Class2
ASTM A387 Grade 12 Class1 ASTM A387 Grade 12 Class2 ASTM A387 Grade 22 Class1 ASTM A387 Grade 22 Class2
ASTM A515/A515M ASTM A515 Grade 60 ASTM A515 Grade 65 ASTM A515 Grade 70  
ASTM A516/A516M ASTM A516 Grade 55 ASTM A516 Grade 60 ASTM A516 Grade 65 ASTM A516 Grade 70
ASTM A517/A517M ASTM A517 Grade A ASTM A517 Grade B ASTM A517 Grade E ASTM A517 Grade F
ASTM A517 Grade P ASTM A517 Grade J    
ASTM A533/A533M ASTM A533 Grade A Class1 ASTM A533 Grade B Class1 ASTM A533 Grade C Class1 ASTM A533 Grade D Class1
ASTM A533 Grade A Class2 ASTM A533 Grade B Class2 ASTM A533 Grade C Class2 ASTM A533 Grade D Class2
ASTM A533 Grade A Class3 ASTM A533 Grade B Class3 ASTM A533 Grade C Class3 ASTM A533 Grade D Class3
ASTM A537/A537M ASTM A537 Class1 ASTM A537 Class2 ASTM A537 Class3  
ASTM A612/A612M ASTM A612      
ASTM A662/A662M ASTM A662 Grade A ASTM A662 Grade B ASTM A662 Grade C  
EN EN10028-2 EN10028-2 P235GH EN10028-2 P265GH EN10028-2 P295GH EN10028-2 P355GH
EN10028-2 16MO3      
EN10028-3 EN10028-3 P275N EN10028-3 P275NH EN10028-3 P275NL1 EN10028-3 P275NL2
EN10028-3 P355N EN10028-3 P355NH EN10028-3 P355NL1 EN10028-3 P355NL2
EN10028-3 P460N EN10028-3 P460NH EN10028-3 P460NL1 EN10028-3 P460NL2
EN10028-5 EN10028-5 P355M EN10028-5 P355ML1 EN10028-5 P355ML2 EN10028-5 P420M
EN10028-5 P420ML1 EN10028-5 P420ML2 EN10028-5 P460M EN10028-5 P460ML1
EN10028-5 P460ML2      
EN10028-6 EN10028-6 P355Q EN10028-6 P460Q EN10028-6 P500Q EN10028-6 P690Q
EN10028-6 P355QH EN10028-6 P460QH EN10028-6 P500QH EN10028-6 P690QH
EN10028-6 P355QL1 EN10028-6 P460QL1 EN10028-6 P500QL1 EN10028-6 P690QL1
EN10028-6 P355QL2 EN10028-6 P460QL2 EN10028-6 P500QL2 EN10028-6 P690QL2
JIS JIS G3115 JIS G3115 SPV235 JIS G3115 SPV315 JIS G3115 SPV355 JIS G3115 SPV410
JIS G3115 SPV450 JIS G3115 SPV490    
JIS G3103 JIS G3103 SB410 JIS G3103 SB450 JIS G3103 SB480 JIS G3103 SB450M
JIS G3103 SB480M      
GB GB713 GB713 Q245R GB713 Q345R GB713 Q370R GB713 12Cr1MoVR
GB713 12Cr2Mo1R GB713 13MnNiMoR GB713 14Cr1MoR GB713 15CrMoR
GB713 18MnMoNbR      
GB3531 GB3531 09MnNiDR GB3531 15MnNiDR GB3531 16MnDR  
DIN DIN 17155 DIN 17155 HI DIN 17155 HII DIN 17155 10CrMo910 DIN 17155 13CrMo44
DIN 17155 15Mo3 DIN 17155 17Mn4 DIN 17155 19Mn6