Gangsteel supplies ASME SA516 Grade 70N Steel Plate (ASME SA516 Grade 70N, SA516 GR.70N, SA516 Gr.70N and SA-516 Grade 70N). Grade 70N is purchase language for a normalized delivery of Grade 70, not a separate official strength grade. The official Grade 70 page is ASME SA516 Grade 70.
This is a focused supporting page for ASME SA516 Grade 70N, written to the same public-reference basis as the official Gangsteel SA516 grade pages. Tensile ranges cited below follow the official ASTM A516/A516M-25 public Scope (inch-pound and SI systems are independent). Chemistry and the other strength figures are the public family references already disclosed on ASME SA516 Grade 70. They are not an official extract of a named ASME SA-516 edition. A later edition, if named on the purchase order, governs. No figure from another standard is presented as this standard’s requirement. Within the pressure-vessel and boiler steel plate range, Gangsteel coordinates mill production, plate processing and export supply around the contractual edition and the requirements of each order.
Grade Designation
ASME SA516 Grade 70N is identified as ASME SA516 Grade 70N, SA516 GR.70N, SA516 Gr.70N and SA-516 Grade 70N. On an ASME order, write ASME SA-516 or SA-516M consistently, and use Grade 70 or Grade 485 with the unit system stated explicitly. On an ASTM order, write ASTM A516 or A516M in the same way. Do not mix the two unit systems on one line item.
Grade 70N (also written SA516 GR.70N, A516 Gr.70N or “+N”) is not a fifth official strength grade. It is Grade 70 ordered in the normalized condition. The certificate must show the condition actually supplied.
The official product page for this designation is ASME SA516 Grade 70.
Key Advantages of ASME SA516 Grade 70N Steel Plate
ASME SA516 Grade 70N is useful to buyers when the following points are kept in view.
- 70N is a clear way to require normalizing at any thickness.
- The mill certificate must record the condition actually supplied.
- A normalized certificate does not, by itself, close an impact-test requirement.
Chemical Composition of ASME SA516 Grade 70N Steel Plate
Public reference commonly published for the A516 / SA-516 Grade 70 family, in mass %. These figures are reused from the official Gangsteel SA516 grade pages. They are not an official extract of a named ASME SA-516 edition. Accept plate against the designation, edition and unit system named in the purchase order and shown on the certificate.
| Plate thickness | Heat analysis | Product analysis |
|---|---|---|
| ½ in. [12.5 mm] and under | 0.27 | 0.27 |
| Over ½ in. to 2 in. [12.5 to 50 mm], incl. | 0.28 | 0.28 |
| Over 2 in. to 4 in. [50 to 100 mm], incl. | 0.30 | 0.30 |
| Over 4 to 8 in. [100 to 200 mm], incl. | 0.31 | 0.31 |
| Over 8 in. [200 mm] | 0.31 | 0.31 |
| Scope | Heat analysis | Product analysis |
|---|---|---|
| All listed thicknesses | 0.85–1.20 | 0.79–1.30 |
| Element | Heat analysis | Product analysis |
|---|---|---|
| Silicon | 0.15–0.40 | 0.13–0.45 |
| Phosphorus, maximum | 0.025 or 0.035; see edition note | 0.025 or 0.035; see edition note |
| Sulfur, maximum | 0.025 or 0.035; see edition note | 0.025 or 0.035; see edition note |
Phosphorus and sulfur maxima are shown as 0.025 or 0.035 because public compilations used on the official grade pages record both figures. This page does not present either value as a certified current ASME or ASTM edition extract. The edition named on the purchase order governs.
Mechanical Properties of ASME SA516 Grade 70N Steel Plate
Public reference / mill restatement for the Grade 70 family, not a certified ASME edition table. Confirm the ordered edition and unit system. Inch-pound and SI tensile ranges come from the official ASTM A516/A516M-25 public Scope; the two systems are independent, not exact conversions. Thickness adjustments to elongation follow A20/A20M or the corresponding ordered SA-20 requirements.
| Property | Published reference value | Basis / conditions |
|---|---|---|
| Tensile strength, Grade 70 | 70–90 ksi | Inch-pound; ASTM A516/A516M-25 public Scope. |
| Tensile strength, Grade 485 | 485–620 MPa | SI; ASTM A516/A516M-25 public Scope. |
| Minimum yield strength | 38 ksi | Inch-pound; SSAB Grade 70 required-property table, as disclosed on the official ASME SA516 Grade 70 page. 38 ksi is not published here as 270 MPa or as an official ASME SI yield. |
| Minimum elongation, 2 in. [50 mm] gauge | 21% | Public required-property basis used on the official grade page; A20/A20M or corresponding SA-20 thickness adjustments apply. |
| Minimum elongation, 8 in. [200 mm] gauge | 17% | Same reference basis and applicable thickness adjustments. |
Delivery Condition, Tests and Heat Treatment
Public family references describe normalizing for plates over 1.50 in. [40 mm] unless otherwise ordered, and normally as-rolled delivery at and below that boundary unless ordered otherwise. For thinner plates requiring notch-toughness testing, they describe normalizing unless the purchaser specifies otherwise. Establish the applicable rule from the ordered edition. Writing “N” or Grade 70N on the order is purchase language for normalizing at any thickness; the certificate must show the condition actually supplied. Neither “N” nor the grade designation by itself supplies a Charpy temperature or absorbed-energy criterion.
If normalizing at any thickness is required, write it explicitly (for example Grade 70N or “+N”) and require the actual condition in the material documents. Describe ultrasonic method and acceptance, not simply “UT.” For impact tests, include temperature, orientation and criteria. If simulated post-weld heat treatment is part of the purchase specification, submit those project conditions with the enquiry.
Available Dimensions of ASME SA516 Grade 70N Steel Plate
The chemistry tables used on the official grade pages include thickness bands through over 8 in. [200 mm]. That schedule is a composition reference, not a claim that every thickness is held as inventory. Width, length, quantity and any processing (cutting, bevelling) are as specified on the order and as the mill can produce. Gangsteel does not publish a standing stock list on this page. The purchaser should state the required thickness, dimensions and quantity at enquiry.
Main Applications of ASME SA516 Grade 70N Steel Plate
ASME SA516 Grade 70N is used in welded pressure vessels, boilers and related process equipment when the project specification names this grade and edition. Design temperature, corrosion allowance, impact testing, heat treatment and any sour-service tests remain decisions for the design and purchase documents. This page does not invent a service-temperature limit or a corrosion rate.
Equivalent Grades of ASME SA516 Grade 70N Steel Plate
The following existing Gangsteel product pages are corresponding or related grades often discussed alongside ASME SA516 Grade 70N. Correspondence is not automatic substitution. The purchase order must name the standard, the grade, the edition and the delivery condition. This page does not treat unverified foreign grade lists as identical materials.
| Related official page | Procurement distinction |
|---|---|
| ASTM A516 Grade 70 | Corresponding ASTM family designation. An ASTM-only certificate does not automatically satisfy a specified SA-516 Code order. |
| ASME SA516 Grade 55 | A different specified strength grade in the same family, not a substitute certificate or an unchanged order. |
| ASME SA516 Grade 60 | A different specified strength grade in the same family, not a substitute certificate or an unchanged order. |
| ASME SA516 Grade 65 | A different specified strength grade in the same family, not a substitute certificate or an unchanged order. |
Related Products
The official grade page is ASME SA516 Grade 70. Related supporting pages on this site include ASME SA516 Grade 70 vs Grade 70N.
FAQ about ASME SA516 Grade 70N Steel Plate
What does the N in ASME SA516 Grade 70N mean?
On ASME SA516 Grade 70N, N is purchase language for a normalized delivery of Grade 70. It is not a separate official tensile grade. The certificate must show the condition actually supplied.
Is ASME SA516 Grade 70N a different grade from Grade 70?
No. ASME SA516 Grade 70N is Grade 70 ordered normalized. Strength requirements remain those of the Grade 70 family, confirmed against the ordered edition. See ASME SA516 Grade 70.
Does a normalized ASME SA516 Grade 70N certificate settle impact testing?
No. A normalized certificate for ASME SA516 Grade 70N documents delivery condition. Any impact temperature, orientation and acceptance criteria must still be written on the order.
Please contact Gangsteel with the grade ASME SA516 Grade 70N (including any SA516 GR or A516 Gr form you use), the contractual edition, thickness and dimensions, delivery condition, and any supplementary requirements such as impact testing, ultrasonic examination, product analysis or simulated PWHT. Visit Gangsteel or contact Gangsteel to place the enquiry.
For production, processing and export enquiries for ASME SA516 Grade 70N Steel Plate, please contact Gangsteel. The official grade page is ASME SA516 Grade 70. Visit Gangsteel for the full plate-supply range.