Pressure Vessel Steel Grades Comparison Guide (ASTM, EN, GB & Equivalent Chart)

Introducción

Pressure vessel steel grades are specifically engineered for manufacturing boilers, storage tanks, and high-pressure equipment. Selecting the right chapa de acero para recipientes a presión is essential to ensure safety, long-term performance, and compliance with international standards such as ASTM, EN, and GB.

This guide provides a practical comparison of pressure vessel steel grades, including ASTM, EN, and GB standards, along with an equivalent chart to support global sourcing and project-based procurement decisions.

1. ¿Qué son los grados de acero para recipientes a presión?

Pressure vessel steel plates are designed to withstand high pressure and temperature in demanding industries such as oil & gas, petrochemical processing, power generation, and LNG storage.

Propiedades principales del acero para recipientes a presión

• Alta resistencia a la tracción y tenacidad
• Buena resistencia a la fluencia y a la fatiga
• Excelente soldabilidad y conformabilidad

Aplicaciones de las placas de acero para recipientes a presión

• Calderas e intercambiadores de calor
• Separadores de petróleo y gas
• Tanques de almacenamiento de GNL
• Reactores químicos
• Equipos de centrales eléctricas

From an engineering and procurement perspective, calidades de acero para recipientes a presión are commonly classified into:

• Low-temperature pressure vessel steels (16MnDR)
• Carbon steel grades (A516, Q245R)
• Alloy steel grades (A387, 16Mo3)

2. Pressure Vessel Steel Grades by International Standards (ASTM / EN / GB)

Para garantizar la compatibilidad global y la seguridad, grados de materiales para recipientes a presión están normalizados por los principales códigos internacionales. Los más reconocidos son ASTM, ESy GB.

ASTM (ASME-oriented projects)

• De uso común en América del Norte y del Sur, el Sudeste Asiático y Oriente Próximo.
• Entre las normas clave figuran:
  • ASTM A516 (para servicio a temperatura moderada)
  • ASTM A387 (para servicio a alta temperatura, acero aleado)
  • ASTM A285 (recipientes a presión de menor resistencia)

EN (European standard – PED projects)

• Widely used in Europe, Africa, international EPC projects
• Entre las normas clave figuran:
  • EN 10028-2: Aceros no aleados y aleados para aplicaciones a presión
  • Grados típicos: P265GH, P355GH, 16Mo3, 13CrMo4-5

Consulte nuestro Placa de acero EN 10028 P265GH / P355GH para más especificaciones técnicas.

GB (China standard – export supply chain)

• Common in global sourcing from Chinese mills
• Entre las normas clave figuran:
  • GB 713: Chapas de acero para calderas y recipientes a presión
  • Grados comunes: Q245R, Q345R, 16MnDR

3. Pressure Vessel Steel Grades Comparison (ASTM vs EN vs GB)

Understanding the differences between standards helps buyers select the correct material for pressure, temperature, and certification requirements.

Grado	Estándar	Rendimiento / Tracción (MPa)	Alargamiento (%)	Impact	Temp	Equivalente	Recommended Applications
A516 Gr.60	ASTM	≥220 / 415–550	≥21	27J @ -20°C	≤455°C	EN P265GH / GB Q245R	Boilers, moderate-pressure tanks
A516 Gr.70	ASTM	≥260 / 485–620	≥21	27J @ -20°C	≤455°C	GB Q345R	High-pressure boilers, heat exchangers
A285 Gr.C	ASTM	≥205 / 380–515	≥20	Bajo	≤400°C	-	Low-pressure storage tanks
A387 Gr.11	ASTM	≥275 / 485–620	≥20	Buena a alta temperatura	≤600°C	-	Petroquímica, centrales eléctricas
A387 Gr.22	ASTM	≥310 / 620–760	≥19	High-temp creep	≤620°C	-	Reactors, high-pressure systems
P265GH	EN 10028	≥265 / 410–530	≥22	27J A 20°C	≤450°C	ASTM A516 Gr.60	Boilers, European pressure vessels
P355GH	EN 10028	≥355 / 470–630	≥22	27J A 20°C	≤450°C	ASTM A516 Gr.70	Componentes de alta presión, sector energético
16Mo3	EN 10028	≥280 / 450–600	≥22	27J @ RT	≤600°C	-	Intercambiadores de calor, tuberías de vapor
Q245R	GB 713	≥245 / 400–520	≥21	31J A 0°C	≤450°C	ASTM A516 Gr.60	Recipientes a presión en general, calderas
Q345R	GB 713	≥345 / 490–610	≥21	34J A 0°C	≤450°C	ASTM A516 Gr.70	Thick-walled vessels, high-strength tanks
16MnDR	GB 3531	≥255 / 470–640	≥22	41J @ -20°C	≤-40°C	-	Cryogenic LNG tanks, low-temp vessels

While comparing pressure vessel steel grades across ASTM, EN, and GB standards, buyers should also pay attention to quality classifications and manufacturing requirements. In practical procurement, PVQ (Pressure Vessel Quality) steel plates are often specified for projects requiring higher safety standards and stricter inspection criteria.

Understanding PVQ (Pressure Vessel Quality) Steel Plates

PVQ (Pressure Vessel Quality) steel plates are produced under enhanced quality control processes to meet the stringent requirements of pressure vessel fabrication.

Compared with standard structural steel plates, PVQ steel offers:

• Improved impact toughness
• Better consistency in mechanical properties
• Strict control of chemical composition
• Enhanced weldability for pressure applications

Common PVQ steel grades include:

• A516 Gr.70 PVQ
• A285 PVQ

These grades are widely used in ASME-certified pressure vessels, boilers, and petrochemical equipment where reliability under pressure is critical.

Chemical Composition of Key Pressure Vessel Steel Grades

Below is a representative chemical composition comparison of commonly used pressure vessel steel grades:

Grado	C	Mn	Si	P	S	Cr	Mo	Ni	Notas
A516 Gr.60	0.21	0.55-1.30	≤0.40	≤0.035	≤0.035	-	-	-	Acero al carbono
A516 Gr.70	0.27	0.85-1.20	≤0.40	≤0.035	≤0.035	-	-	-	Versión más resistente de A516 Gr.60
A387 Gr.11	0.12-0.20	0.30-0.60	≤0.50	≤0.035	≤0.035	1.00-1.50	0.44-0.65	-	Acero aleado al Cr-Mo
P265GH	≤0.20	0.80-1.60	≤0.40	≤0.025	≤0.020	-	-	-	Acero no aleado para calderas
P355GH	≤0.22	1.00-1.70	≤0.50	≤0.025	≤0.020	-	-	-	Mayor resistencia Grado EN
Q245R	≤0.20	≤1.20	≤0.50	≤0.025	≤0.015	-	-	-	Norma china, A516 Gr.60 equiv.
Q345R	≤0.20	≤1.70	≤0.50	≤0.025	≤0.015	-	-	-	Más cerca de A516 Gr.70

4. Pressure Vessel Steel Equivalent Chart (ASTM, EN, GB)

For international projects and cross-border procurement, understanding pressure vessel steel grade equivalents is critical when sourcing materials from different regions.

Common equivalent relationships

ASTM	ES	GB
A516 Gr.60	P265GH	Q245R
A516 Gr.70	P355GH	Q345R
A387 Gr.11	16Mo3	-

Practical procurement insight

• A516 Gr.70 equivalent to Q345R is widely used in Chinese export supply
• P265GH equivalent ASTM material is typically A516 Gr.60
• EN grades are preferred for PED-certified projects, while ASTM grades dominate ASME projects

Note: Equivalent grades are not identical. Always verify:

• Impact test requirements
• Heat treatment condition
• Certification (ASME / PED / EN10204 3.1)

5. Cómo elegir el grado de acero adecuado para recipientes a presión

Seleccionar el grado de acero para recipientes a presión depende de:

1. Presión y temperatura de funcionamiento - Grados superiores para condiciones extremas.
2. Resistencia a la corrosión - Acero aleado para exposición química.
3. Soldabilidad - Haga coincidir el grado con el proceso de fabricación.
4. Requisitos de certificación - ASME, PED o normas locales.

Selección de materiales por rango de temperatura

Temperatura de trabajo	Grados recomendados	Notas
≤ 400°C (Temperatura normal)	A516 Gr.60 / Gr.70, P265GH, Q245R	Rentable, buena soldabilidad, ampliamente disponible
400°C - 600°C	A387 Gr.11 / Gr.22, 16Mo3, P355GH, Q345R	Los grados aleados proporcionan resistencia al calor, resistencia a la fluencia
≤ -20°C (Criogénico)	16MnDR, prueba de impacto A516 Gr.70, Q345R (especificación baja temperatura)	Mayor resistencia a los impactos, necesaria para buques de GNL o de baja temperatura

Selección de materiales por tipo de aplicación

Aplicación	Calidades de acero recomendadas
Calderas y tambores de vapor	A516 Gr.70, P265GH, Q245R
Recipientes a presión petroquímicos	A387 Gr.11 / Gr.22, 16Mo3, P355GH
Depósitos criogénicos de GNL	16MnDR, Q345R (probado), A516 con tenacidad al impacto a -20°C
Intercambiadores de calor	16Mo3, A387 Gr.11
Depósitos industriales	A285 Gr.C, A516 Gr.60, Q245R
Equipos nucleares o energéticos	A387 Gr.22, 16Mo3, P355GH

Si desea más información sobre calidades de acero para aplicaciones de alta presión, puede explorar: Chapas de acero estructural frente a chapas de acero para recipientes a presión: ¿Cuál es la diferencia?

6. Preguntas más frecuentes (FAQ)

• Q: What is the difference between ASTM and EN pressure vessel steel grades?
  ASTM grades are based on U.S. specifications, while EN grades follow European regulations. Both define mechanical and chemical properties for pressure vessel plates, but may differ in testing methods.
• Q: Is P265GH equivalent to A516 Gr.60 or Gr.70?
  P265GH is comparable to A516 Gr.60 in terms of pressure vessel applications, but the exact composition and standards differ. For projects requiring EN standards, P265GH is preferred; for ASME-coded vessels, A516 Gr.60/70 is standard.
• Q: What is PVQ steel plate and why is it important?
  Pressure Vessel Quality (PVQ) steel ensures superior impact toughness and strict quality control, often required for ASME vessels and high-pressure systems.
• Q: Which steel is suitable for cryogenic LNG applications?
  16MnDR or impact-tested A516 Gr.70 provide excellent low-temperature toughness for cryogenic storage.
• Q: How to select steel for high-temperature, high-pressure petrochemical equipment?
  Use A387 Gr.11/Gr.22, 16Mo3, P355GH, which provide heat resistance, creep strength, and corrosion resistance.
• Q: What is the Chinese equivalent of A516 Gr.70?
  The closest equivalent is Q345R in the GB713 standard, offering similar mechanical strength and usage. For less demanding applications, Q245R is used.

7. Conclusión

Comprender calidades de acero para recipientes a presión, their differences, and equivalent relationships is essential for engineers and buyers involved in global projects. Whether you are sourcing ASTM A516, EN P355GH, or GB Q345R, selecting the correct chapa de acero para recipientes a presión ensures safety, compliance, and cost efficiency.

For project-based sourcing or technical support, feel free to contact us.

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