ASME SA516 GRADE 70 Carbon Steel Plates

General Description

ASME SA516 Grade 70 carbon steel plates, also known as ASME SA516GR70 or ASME SA516 GR 70, are a premium grade designed for moderate and lower temperature pressure vessels, boilers, and storage tanks. This material offers a tensile strength of 485-620 MPa and a minimum yield strength of 260 MPa, making it an excellent choice for applications requiring high toughness and weldability under pressures up to 500 bar and temperatures up to 450°C. SHH STEEL, a leading carbon steel exporter, supplies these plates in thicknesses from 5mm to 500mm, with widths up to 4600mm and lengths to 12000mm, providing versatility for large-scale industrial projects.

The normalized condition of ASME SA 516 GR 70 plates refines the grain structure, improving ductility and impact resistance, which is essential for welded constructions in harsh environments. For buyers searching for ASME SA516 Gr.70 properties or equivalents, this grade stands out for its cost-effectiveness and strict compliance with ASME Section VIII Division 1, the code governing the construction of pressure vessels. SHH STEEL’s ASME SA516 GR.70 plates undergo comprehensive testing, including ultrasonic inspection to detect laminations and Charpy impact for low-temperature performance, ensuring defect-free delivery. This grade is particularly valued in oil & gas, power generation, and petrochemical sectors where safety and longevity are paramount.

With a balanced carbon equivalent (CE ≤0.42 per AWS D1.1), ASME SA516 Grade 70 plates facilitate easy welding, reducing the risk of hydrogen-induced cracking. The material’s ability to maintain properties after heat treatment makes it ideal for multi-pass welding in vessel fabrication. SHH STEEL’s commitment to quality means every plate is backed by mill test certificates, offering buyers peace of mind for critical applications.

Material Specification

ASME SA516 Grade 70 carbon steel plates are specified under ASME SA-516/SA-516M, the ASME Boiler and Pressure Vessel Code Section II Part A adaptation of ASTM A516/A516M-17. This specification outlines requirements for carbon steel plates for moderate and lower temperature service, ensuring suitability for welded pressure vessels and boilers.

SHH STEEL complies fully with this standard, providing plates in normalized or stress-relieved conditions to optimize mechanical properties. The specification supports thicknesses from 5mm to 500mm, widths up to 4600mm, and lengths to 12000mm, with custom dimensions available for large-diameter vessel designs. Ultrasonic examination per ASME SA-20 or ASTM A435 Class 1 detects laminations, guaranteeing defect-free material, while dual certification with EN 10028-2 or GB/T 713 is offered for international compatibility. This makes our ASME SA516 GR 70 plates a reliable choice for global buyers, supported by mill test certificates for complete traceability.

Specification Element	Requirement	SHH STEEL Compliance	Keywords
Primary Standard	ASME SA-516/SA-516M	ASME Section VIII	SA516 Gr.70 specification
Thickness Range	5mm-500mm (custom)	Mill Test Certificate	SA516 Gr.70 dimensions
Width/Length	Up to 4600mm / 12000mm	Custom fabrication available	SA516 Gr.70 size options
Ultrasonic Testing	No laminations >0.25% thickness	Class 1 per ASME SA-20	SA516 Gr.70 inspection
Heat Treatment	Normalized or stress-relieved	900-950°C furnace control	SA516 Gr.70 heat treat

Chemical Composition

The chemical composition of ASME SA516 Grade 70 carbon steel plates is meticulously controlled per ASME SA-516/SA-516M to ensure weldability, toughness, and corrosion resistance, with testing conducted via ASME SA-350 for batch consistency.

The maximum carbon content of 0.27% prevents brittleness, while manganese (0.85-1.20%) enhances hardenability. Phosphorus and sulfur are limited to 0.035% each to reduce the risk of cracking during welding, and silicon (0.15-0.40%) supports deoxidation during steelmaking. Optional elements like vanadium (≤0.02%) refine grains, boosting low-temperature impact resistance. SHH STEEL maintains a Carbon Equivalent (CE) ≤0.42 per AWS D1.1, making ASME SA516 GR 70 plates a reliable choice for buyers searching for “ASME SA516 GR 70 chemical composition.”

Element	Content (%)	Standard Limit	Test Method	Role	Keywords
Carbon (C)	≤0.27	0.27 max	ASME SA-350	Strength without brittleness	SA516 Gr.70 carbon
Manganese (Mn)	0.85-1.20	0.85-1.20	ASME SA-350	Toughness, hardenability	SA516 Gr.70 manganese
Phosphorus (P)	≤0.035	0.035 max	ASME SA-350	Reduces brittleness	SA516 Gr.70 phosphorus
Sulfur (S)	≤0.035	0.035 max	ASME SA-350	Improves weldability	SA516 Gr.70 sulfur
Silicon (Si)	0.15-0.40	0.15-0.40	ASME SA-350	Deoxidation, fluidity	SA516 Gr.70 silicon
Vanadium (V)	≤0.02	0.02 max	ASME SA-350	Grain refinement	SA516 Gr.70 vanadium

Mechanical Properties

ASME SA516 Grade 70 carbon steel plates exhibit robust mechanical properties, tested per ASME SA-8 for tensile/yield, ASME SA-23 for impact, and ASME SA-466 for fatigue, making them suitable for pressure vessel service.

The minimum yield strength of 260 MPa and tensile range of 485-620 MPa ensure high load-bearing capacity, with 17% elongation providing ductility for forming. Low-temperature impact of 27J at -20°C prevents brittle failure, while the modulus of elasticity (200 GPa per ASME SA-111) supports structural stability.

Fatigue limit (250 MPa est. per ASME SA-466) varies with surface finish, optimized by SHH STEEL’s grinding. These properties make ASME SA516 GR.70 plates a top choice for buyers searching for “ASME SA516 GR 70 mechanical properties,” offering reliable performance in high-pressure environments.

Property	Value	Test Method	Temperature (°C)	Thickness Effect	Keywords
Tensile Strength	485-620 MPa	ASME SA-8	Ambient	-5% >100mm	SA516 Gr.70 tensile
Yield Strength	260 MPa (min)	ASME SA-8	Ambient	Stable to 200mm	SA516 Gr.70 yield
Elongation	17% (min)	ASME SA-8	Ambient	15-20% (5-25mm)	SA516 Gr.70 elongation
Impact Energy	27J @ -20°C (min)	ASME SA-23	-20	27J all thicknesses	SA516 Gr.70 impact
Modulus of Elasticity	200 GPa	ASME SA-111	Ambient	Constant	SA516 Gr.70 modulus
Fatigue Limit	250 MPa (est.)	ASME SA-466	Ambient	Varies with surface	SA516 Gr.70 fatigue

Delivery Conditions

Delivery conditions for ASME SA516 GR 70 carbon steel plates define their mechanical state, impacting suitability for pressure vessel fabrication.

SHH STEEL supplies plates in as-rolled, normalized (900-950°C), or stress-relieved (620-650°C) conditions per ASME SA-20, with quenched and tempered options for enhanced toughness. Normalized plates refine grain for improved impact resistance in boilers up to 450°C.

Stress-relieved reduce residual stresses for welded structures, while quenched and tempered (870-900°C quench, 650°C temper) suit wear applications. Heat numbers ensure traceability, with SHH STEEL offering rapid global transit.

Condition	Temperature (°C)	Duration (hours/inch)	Standard	Keywords
As-Rolled	Ambient	N/A	ASME SA-20	SA516 Gr.70 delivery
Normalized	900-950	1	ASME SA-20	SA516 Gr.70 normalized
Stress-Relieved	620-650	1	ASME SA-20	SA516 Gr.70 stress relief
Quenched & Tempered	Quench 870-900, Temper 650	0.5-1	ASME SA-20	SA516 Gr.70 tempered
Transit Time (Asia)	3-7 days	N/A	ISO 9001	SA516 Gr.70 shipping

Tolerances

Tolerances for ASME SA516 GR 70 carbon steel plates are essential for precision in fabrication, minimizing fit-up issues.

SHH STEEL adheres to ASME SA-6, with ±1.5mm thickness tolerance for plates under 40mm and ±2.0mm for thicker sections up to 200mm (custom 300mm).

Width and length tolerances are ±10mm standard, with ±5mm for precision orders up to 4600mm width and 12000mm length.

Surface flatness is 3mm per meter, per ASME SA-6, preventing warping. For European projects, EN 10029 Class B tolerances are offered, enhancing compatibility.

Tolerance Type	Value (mm)	Standard	Applicable Thickness (mm)	Keywords
Thickness (<40mm)	±1.5	ASME SA-6	5-40	SA516 Gr.70 tolerance
Thickness (>40mm)	±2.0	ASME SA-6	40-200	SA516 Gr.70 thickness tol
Width	±10 (standard), ±5 (custom)	ASME SA-6, EN 10029	All	SA516 Gr.70 width tol
Length	±10 (standard), ±5 (custom)	ASME SA-6, EN 10029	All	SA516 Gr.70 length tol
Flatness	3mm per meter	ASME SA-6	All	SA516 Gr.70 flatness spec

Weldability

SME SA516 GR 70 carbon steel plates are highly weldable due to low carbon (≤0.27%) and CE ≤0.42 per AWS D1.1.

SHH STEEL recommends preheating at 150-200°C for thicknesses over 25mm to prevent hydrogen-induced cracking, with post-weld heat treatment (PWHT) at 620-650°C for stress relief. Supported processes include GTAW, SMAW, and GMAW with E7018 filler (AWS A5.1), achieving 90-95% joint efficiency per ASME Section IX.

Low sulfur (≤0.035%) reduces hot shortness, and 17% elongation ensures ductility. Testing includes bend tests (ASTM E190) for 3t radius and ultrasonic for weld integrity per ASME SA-435.

Weldability Factor	Value/Condition	Standard	Recommended Process	Keywords
Carbon Equivalent (CE)	≤0.42	AWS D1.1	GTAW, SMAW	SA516 Gr.70 weldability
Preheating (°C)	150-200 (>25mm)	ASME Section IX	GMAW	SA516 Gr.70 welding
PWHT (°C)	620-650	ASME SA-20	All	SA516 Gr.70 heat treat
Filler Metal	E7018	AWS A5.1	SMAW	SA516 Gr.70 welding rod
Bend Test Radius (mm)	3t (t=thickness)	ASTM E190	All	SA516 Gr.70 bend test

Equivalent Material Grade

Global equivalents for ASME SA516 Gr.70 facilitate international projects, offering similar tensile and yield properties for pressure vessel use.

Grade	Standard	Tensile (MPa)	Yield (MPa)	Elongation (%)	Impact (J @ -20°C)	Keywords
SA516 Gr.70	ASME SA-516/SA-516M	485-620	260	17	27	SA516 Gr.70 equivalent
P355GH	EN 10028-2	490-630	355	22	34	SA516 Gr.70 EN grade
SPV355	JIS G3115	490-620	355	19	27	SA516 Gr.70 JIS grade
20g/Q345R/Q355R	GB/T 713	490-630	345	21	34	SA516 Gr.70 GB grade
A537 Cl.1	ASTM A537	485-620	345	18	41	SA516 Gr.70 alternative
A285 Gr.C	ASTM A285	310-450	205	26	N/A	SA516 Gr.70 low-cost alt

Supplementary Requirements

Supplementary requirements for ASME SA516 GR 70 carbon steel plates enhance performance for specialized applications, offering buyers tailored options. These include ultrasonic testing (Class 1 per ASME SA-435 for no laminations >0.25% thickness), Charpy impact at -50°C (27J min per ASME SA-20 for cold service), and heat analysis per heat number (ASME SA-350 for traceability).

Product analysis allows ±0.02% tolerance on elements, while shot blasting to Sa 2.5 (50-100μm profile per ISO 8501-1) is available for surface preparation. SHH STEEL provides these to meet stringent needs, as buyers search for “SA516 Gr.70 supplementary requirements.”

Requirement	Detail	Standard	Test Frequency	Applicable Thickness (mm)	Keywords
Ultrasonic Testing	Class 1, no laminations	ASME SA-435	Full plate	5-500	SA516 Gr.70 ultrasonic
Charpy Impact	-50°C, 27J min	ASME SA-20	Per heat	5-500	SA516 Gr.70 cold impact
Heat Analysis	Per heat number	ASME SA-350	Each batch	All	SA516 Gr.70 analysis
Product Analysis	±0.02% tolerance	ASME SA-350	Sample per lot	All	SA516 Gr.70 product test
Shot Blasting	Sa 2.5, 50-100μm profile	ISO 8501-1	On request	5-100	SA516 Gr.70 blasting

Applications

ASME SA516 GR 70 carbon steel plates are versatile for high-pressure and temperature environments, with excellent strength and toughness.

Application	Temperature (°C)	Pressure (bar)	Thickness (mm)	Standard Compliance	Keywords
Pressure Vessels	Up to 450	500	20-100	ASME Section VIII	SA516 Gr.70 vessels
Boilers	Up to 400	300	10-50	ASME Section I	SA516 Gr.70 boilers
Storage Tanks	Up to 200	50	5-30	API 650	SA516 Gr.70 tanks
Oil & Gas Equipment	Up to 350	400	30-120	NACE MR0175	SA516 Gr.70 oil equip
Heat Exchangers	Up to 300	200	10-40	TEMA Standards	SA516 Gr.70 heat exchange

Details: Pressure vessels benefit from 485-620 MPa tensile at 450°C, while boilers handle 400°C with 17% elongation for forming. Storage tanks use 5-30mm plates for 50 bar, and oil & gas equipment leverages 30-120mm for 400 bar with NACE compliance. Heat exchangers utilize 10-40mm plates for 200 bar at 300°C, per TEMA standards for efficient heat transfer.

Why Choose SHH STEEL

Why Choose SHH STEEL

SHH STEEL offers ASME and ASTM-certified SA516 Gr.70 plates, with custom thicknesses up to 300mm and heat treatments tailored to your project. Our 15-year track record includes zero defect deliveries to 50+ countries, backed by SGS verification and mill test certificates.

Advantage	Benefit	Keywords
Expert Certification	ASME Section VIII compliant	SA516 Gr.70 certified
Custom Fabrication	Up to 300mm thickness	SA516 Gr.70 custom
Proven Reliability	50+ countries, zero rejects	SA516 Gr.70 trusted supplier

FAQ

What is ASME SA516 Grade 70 used for?

ASME SA516 Grade 70 is primarily used for pressure vessels, boilers, and storage tanks in oil & gas and power generation. It excels in moderate-temperature service up to 450°C and pressures to 500 bar, with high tensile strength (485-620 MPa) ensuring structural integrity. SHH STEEL supplies these plates for welded constructions per ASME Section VIII Division 1.

What is the difference between SA516 Gr.70 and SA516 Gr.60?

SA516 Gr.70 has higher tensile (485-620 MPa vs. 415-550 MPa) and yield (260 MPa vs. 220 MPa) than Gr.60. Gr.70 offers better toughness with 27J impact at -20°C, while Gr.60 is cost-effective for lower stresses. SHH STEEL recommends Gr.70 for higher-pressure applications; see our ASTM A 516 Gr 60 page for comparison.

What is the chemical composition of SA516 Gr.70?

The composition includes C ≤0.27%, Mn 0.85-1.20%, P ≤0.035%, S ≤0.035%, Si 0.15-0.40%, tested per ASME SA-350. This low-carbon formula ensures excellent weldability with CE ≤0.42 (AWS D1.1). SHH STEEL provides MTCs with full analysis for traceability.

Is ASME SA516 Gr.70 weldable?

Yes, SA516 Gr.70 is highly weldable with low carbon (≤0.27%) and preheating at 150-200°C for >25mm thicknesses. Use E7018 filler (AWS A5.1) for 90% joint efficiency per ASME Section IX. PWHT at 620-650°C reduces stress, validated by bend tests per ASTM E190.

What is the density of ASME SA516 Gr.70?

The density is 7.85 g/cm³, standard for carbon steel, aiding weight calculations in vessel design. Hardness is 130-180 HB (ASME SA-18), balancing wear resistance for high-pressure use.

What is the equivalent of ASME SA516 Gr.70 in EN standards?

The closest EN equivalent is P355GH (EN 10028-2), with 490-630 MPa tensile and 355 MPa yield, suitable for EU boilers. SHH STEEL provides dual-certified plates for seamless transitions.

What is the difference between SA516 Gr.70 and SA516 Gr.55?

SA516 Gr.70 has higher tensile (485-620 MPa vs. 380-515 MPa) and yield (260 MPa vs. 205 MPa) than Gr.55. Gr.70 offers better impact (27J at -20°C), while Gr.55 is economical for low-stress. Check our ASTM A 516 Gr 55 page.

What is the difference between SA516 Gr.70 and SA516 Gr.65?

What is the difference between SA516 Gr.70 and SA516 Gr.65? A: SA516 Gr.70 has higher tensile (485-620 MPa vs. 450-585 MPa) and yield (260 MPa vs. 240 MPa) than Gr.65. Gr.70 suits higher pressure (500 bar), while Gr.65 is for moderate use. Visit our ASTM A 516 Gr 65 page.

What is the difference between SA 516 GR 60 and GR 70?

The main difference is strength: Property SA 516 Gr 60 SA 516 Gr 70 Minimum Yield Strength 220 MPa 260 MPa Minimum Tensile Strength 415–550 MPa 485–620 MPa Application Moderate pressure/temperature Higher pressure/temperature Otherwise, the chemical composition and manufacturing process are almost the same. Gr 70 is preferred for high-pressure boilers and vessels, while Gr 60 is sufficient for medium-duty service.

What is the difference between GR 105 and GR 55?

Grade 105 refers to ASTM A105, a forged carbon steel used for flanges, fittings, and valves under high pressure. Grade 55 refers to ASTM A516 Grade 55, a rolled steel plate used for boiler and pressure vessel fabrication. Key differences: A105 → Forged components (round bars, flanges) A516 Gr 55 → Flat plates A105 typically has higher strength and hardness due to the forging process.

How strong is grade 55 steel?

ASTM A516 Grade 55 has a minimum yield strength of 220 MPa (32 ksi) and a tensile strength range of 380–515 MPa (55–75 ksi). It is strong enough for moderate-pressure vessels and boilers, while still offering good ductility and weldability.

What is the difference between ASTM A500 GR B and C?

ASTM A500 is a specification for cold-formed welded and seamless carbon steel structural tubing. The main differences between Grade B and Grade C are in strength and wall thickness: Property Grade B Grade C Minimum Yield Strength 315 MPa (46 ksi) 345 MPa (50 ksi) Minimum Tensile Strength 400 MPa (58 ksi) 427 MPa (62 ksi) Usage General structures Higher-strength applications In summary, Grade C has higher strength than Grade B, and is often used where lighter walls and higher load capacity are required.

SHH STEEL SOLUTION

SHH STEEL’s ASME SA516 Gr.70 Carbon Steel Plates provide unmatched strength and reliability for pressure vessels and boilers. With precise tolerances, superior weldability, and global equivalents, we offer customized solutions. Trust SHH STEEL for your steel needs—explore our ASTM A 516 Gr 70 page for more details.

For more other grade, please check in the following: ASME SA 516/SA 516M, ASME SA 516 GR 70, ASME SA 516 GR 65, ASME SA 516 GR 60 and ASME SA 516 gr 55 Steel Plate Grade.