SA 516 Gr 70 Density in kg/m³ for Pressure Vessel Engineers

SA 516 Gr 70 Density in kg/m³: Essential Guide for Pressure Vessel Engineers

The density of SA 516 Gr 70, a carbon steel plate grade under ASME SA-516 for pressure vessels, is a critical property for engineers calculating weight in applications like boilers and storage tanks. The SA 516 Gr 70 density is approximately 7850 kg/m³ (7.85 g/cm³), typical for carbon steels with low alloy content. This article details the density, its implications for design, chemical composition, mechanical properties, and applications, with comparisons to related grades like ASME SA 516 Gr 65, ASME SA 516 Gr 60, and ASME SA 516 Gr 55, addressing the core keyword sa 516 gr 70 density in kg m3. For more details, visit our ASME SA 516 Gr 70 steel plate.

SA 516 Gr 70 Density

The density of SA 516 Gr 70 is 7850 kg/m³ (7.85 g/cm³), consistent with most carbon steels used in pressure vessel applications. This value is derived from its iron-based composition with minimal alloying elements, ensuring uniformity across thicknesses and heat treatments.

• Density: 7850 kg/m³ (7.85 g/cm³).
• Weight Calculation: Weight (kg) = Density (7850 kg/m³) × Volume (m³).
• Example: A SA 516 Gr 70 plate of 1 m × 1 m × 10 mm (0.01 m³ volume) weighs 0.01 × 7850 = 78.5 kg.
• Practical Use: The density supports weight optimization in pressure vessel design, ensuring efficient material use for applications like boilers and petrochemical tanks.

Chemical Composition Supporting Density

The chemical composition of SA 516 Gr 70 contributes to its standard density:

Key Elements:

• Low Alloy Content: Minimal alloying (no significant Cr, Ni, Mo) maintains the density at 7850 kg/m³, similar to other carbon steels.
• Carbon (C): ≤0.27% ensures weldability and toughness without affecting density.
• Manganese (Mn): 0.85-1.20% enhances strength, contributing to structural performance.

Carbon Equivalent (CEV): Typically ≤0.43%, calculated as CEV = C + Mn/6 + (Cr + Mo + V)/5 + (Ni + Cu)/15, supports weldability without impacting density.

Mechanical Properties Supporting Structural Use

The mechanical properties of SA 516 Gr 70 complement its density for high-pressure applications:

• Yield Strength: ≥260 MPa supports load-bearing in pressure vessels.
• Tensile Strength: 485-620 MPa ensures durability under pressure.
• Elongation: ≥27% allows ductility for forming.
• Impact Toughness: ≥27 J at -46°C ensures low-temperature reliability.

The density of 7850 kg/m³ enables accurate weight calculations for structural design, balancing strength and material efficiency.

Comparison with Other SA 516 Grades

Key Note: All SA 516 grades share the same density (7850 kg/m³) due to similar low-alloy compositions, but SA 516 Gr 70 has higher strength than Gr 55, Gr 60, and Gr 65, making it suitable for higher-pressure applications.

Welding and Heat Treatment

The SA 516 Gr 70 density does not affect its weldability:

• Welding: Compatible with SMAW, GMAW, SAW per ASME Section IX. Preheating (149-204°C for >38 mm) prevents cracking; PWHT (593-649°C) for stress relief in thick sections.
• Consumables: E7018 electrodes for SMAW; ER70S-6 wire for GMAW.

The low carbon content and CEV ensure robust welds, supporting structural integrity.

Applications

The SA 516 Gr 70 density supports applications in:

• Pressure Vessels: Boilers and tanks for -46°C to 343°C service.
• Offshore Structures: Cold marine applications with impact toughness.
• Petrochemical Tanks: Low-temperature liquid storage (e.g., LNG).

Explore ASME SA 516 Gr 65 for slightly lower strength needs.

Why Choose Gangsteel?

Gangsteel supplies SA 516 Gr 70:

• Inventory: Extensive stock in China.
• Sizes: Thickness 6-200 mm, widths up to 3000 mm.
• Delivery: 7-30 days globally.
• Certifications: ASME SA-516, EN 10204 3.1/3.2, UT testing, ABS/LR/BV/DNV approvals.
• Processing: Cutting, rolling, bending.

• Practical Density Calculations for Engineers

  To leverage the SA 516 Gr 70 density effectively, use this formula: Weight (kg) = Density (7850 kg/m³) × Volume (m³)

  Example 1: Basic Plate Weight For a standard plate: Length = 2 m, Width = 1.5 m, Thickness = 20 mm (0.02 m). Volume = 2 × 1.5 × 0.02 = 0.06 m³. Weight = 7850 × 0.06 = 471 kg. Pro Tip: Use this for quick bids—Gangsteel provides free weight calculators on request.

  Example 2: Cylindrical Vessel Shell For a pressure vessel shell: Diameter = 1 m (radius 0.5 m), Height = 3 m, Thickness = 15 mm (0.015 m). Surface Area ≈ π × Diameter × Height = 3.14 × 1 × 3 = 9.42 m². Volume = Surface Area × Thickness = 9.42 × 0.015 ≈ 0.1413 m³. Weight = 7850 × 0.1413 ≈ 1,110 kg. Advanced Insight: Factor in corrosion allowance (e.g., +2 mm) for long-term service in corrosive environments like LNG storage.

  [Insert Chart Placeholder: Interactive density vs. thickness graph for SA 516 Gr 70, showing weight trends. Alt text: "Density calculation chart for SA 516 Gr 70 plates"]

  These calculations highlight how the SA 516 Gr 70 density supports efficient designs, reducing material overuse by up to 15% compared to denser alloys.

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