---
title: "316 Stainless Steel Equal Angle | Laxcon Steels"
source: "https://www.laxconsteels.com/products/hrap-equal-angles/aisi-316/"
description: "AISI 316 stainless steel equal angle, made to order by Laxcon Steels, India: composition, equivalents, weight per metre and tolerances."
---
# AISI 316 Equal Angles

*[Home](https://www.laxconsteels.com/) > [Products](https://www.laxconsteels.com/products/) > [HRAP Equal Angles](https://www.laxconsteels.com/products/hrap-equal-angles/) > AISI 316*

AISI 316 stainless steel equal angle is the molybdenum-bearing austenitic section, 20 x 20 x 3 to 127 x 127 mm, used in chloride service.

20 x 20 to 127 x 127 mm Austenitic stainless steel Made to order

## AISI 316 equal angle

AISI 316 equal angle is a hot rolled angle section with two legs of the same width, rolled from the molybdenum-bearing austenitic stainless steel. Chromium forms the thin passive oxide film that keeps the surface from rusting, nickel holds the austenitic structure, and the 2.0 to 3.0 percent molybdenum raises resistance to pitting, the local attack chlorides start where that film is weakest. That molybdenum is the reason the grade is specified in place of AISI 304 angle: coastal and marine air, brine, treated water and many process chemicals pit a 304 section while leaving a 316 one sound. It is chosen over 316L where the frame is bolted or lightly welded, the lower carbon of 316L being bought for heavy welds left as welded. Laxcon Steels rolls the angle to order.

The angle is supplied annealed and pickled: the anneal takes the chromium carbides back into solution and the pickling strips the rolling scale. ASTM A276 sets the annealed minima at 515 MPa tensile strength and 205 MPa yield strength, and the section is non-magnetic in this condition. The grade cannot be hardened by heat treatment and takes strength only from cold work, so drilling and sawing call for sharp edges, a firm feed and a rigid setup. It welds by the usual arc processes, although slow cooling through about 450 to 850 C sensitises the weld zone, meaning chromium carbides form at the grain boundaries and open them to attack. Typical uses are frames and supports in chemical plant, walkways and handrails on coastal structures, brackets in food and pharmaceutical plants, and bases for pumps handling chlorinated water.

Composition limits in weight percent are carbon 0.08 maximum, manganese 2.0 maximum, sulphur 0.03 maximum, phosphorus 0.045 maximum, silicon 0.75 maximum, chromium 16.0 to 18.0, nickel 10.0 to 14.0, molybdenum 2.0 to 3.0 and nitrogen 0.1 maximum.

## AISI 316 equal angle supply conditions

| Property | Value |
| --- | --- |
| Length | Up to 6.4 metres |
| Tolerances | ASTM A484, EN10056 |
| Supply condition | Hot rolled, Annealed & Pickled (HRAP) |
| Grit polish | As per customer’s request |
| Bars End Finish | Deburred Ends, Plain Ends without Burrs or Sharp Edges |
| Grade | AISI 316 (316, SS 316, SUS 316, 1.4401) |
| Family | Austenitic stainless steel |
| Supply | Made to order in this grade; every published size of the form |

## Composition of AISI 316

| Element | Symbol | Minimum % | Maximum % |
| --- | --- | --- | --- |
| Carbon | C |  | 0.08 |
| Manganese | Mn |  | 2.0 |
| Sulphur | S |  | 0.03 |
| Phosphorus | P |  | 0.045 |
| Silicon | Si |  | 0.75 |
| Chromium | Cr | 16.0 | 18.0 |
| Nickel | Ni | 10.0 | 14.0 |
| Molybdenum | Mo | 2.0 | 3.0 |
| Nitrogen | N |  | 0.1 |

Composition, weight percent, balance iron. From the Laxcon Steels grade reference.

## Equivalents of AISI 316

| Standard | Designation |
| --- | --- |
| UNS | S31600 |
| EN number | 1.4401 (X5CrNiMo17-12-2) |
| JIS | SUS 316 |

Equivalence means nearest counterpart, not identity: each standards body sets its own composition window, so the limits of the standard named on the order govern.

## Pitting resistance

The pitting resistance equivalent number of AISI 316 runs from 22.6 at the specified minimum chromium, molybdenum and nitrogen to 29.5 at the maxima, computed as PREN = Cr + 3.3Mo + 16N (International Molybdenum Association). It ranks resistance to chloride pitting against other austenitic and duplex grades and nothing else: it does not predict crevice corrosion, stress corrosion cracking or service life. The [pitting resistance reference](https://www.laxconsteels.com/grades/pitting-resistance/) carries the full table.

## Governing standards

| Property | Value |
| --- | --- |
| EN 10088-3 | Stainless steels: technical delivery conditions for semi-finished products, bars, rods, wire, sections and bright products for general purposes. Composition, heat treatment condition and mechanical properties per grade. |
| EN 10056-1 and 10056-2 | Structural steel equal and unequal leg angles: dimensions (part 1) and tolerances on shape and dimensions (part 2). |
| ASTM A276/A276M | Stainless steel bars and shapes: composition, condition, mechanical properties and finish designations for hot-finished and cold-finished bar. |
| ASTM A484/A484M | General requirements for stainless steel bars, billets and forgings: permissible variations in dimensions, straightness, weight and length, and the test and marking requirements every bar order inherits. |
| EN 10204 | Metallic products, types of inspection documents: the 2.2 test report and the 3.1 and 3.2 inspection certificates a purchase order can call for. |

## Weight per metre

| Section (mm) | Thickness (mm) | kg per metre |
| --- | --- | --- |
| 20 x 20 | 3 | 0.88 |
| 25 x 25 | 3 | 1.11 |
| 25 x 25 | 4 | 1.45 |
| 25 x 25 | 5 | 1.78 |
| 25 x 25 | 6 | 2.09 |
| 30 x 30 | 3 | 1.35 |
| 30 x 30 | 4 | 1.77 |
| 30 x 30 | 5 | 2.17 |
| 31.75 x 31.75 | 3.17 | 1.51 |
| 31.75 x 31.75 | 4.76 | 2.21 |
| 31.75 x 31.75 | 6.35 | 2.87 |
| 38.1 x 38.1 | 3.17 | 1.83 |
| 38.1 x 38.1 | 4.76 | 2.69 |
| 38.1 x 38.1 | 6.35 | 3.50 |
| 40 x 40 | 3 | 1.82 |
| 40 x 40 | 4 | 2.40 |
| 40 x 40 | 5 | 2.96 |
| 40 x 40 | 6 | 3.51 |
| 50 x 50 | 3 | 2.30 |
| 50 x 50 | 4 | 3.03 |
| 50 x 50 | 5 | 3.75 |
| 50 x 50 | 6 | 4.46 |
| 50 x 50 | 7 | 5.14 |
| 50 x 50 | 9 | 6.47 |
| 50 x 50 | 9.52 | 6.80 |
| 50 x 50 | 10 | 7.11 |
| 60 x 60 | 5 | 4.54 |
| 60 x 60 | 6 | 5.40 |
| 60 x 60 | 7 | 6.25 |
| 60 x 60 | 8 | 7.08 |
| 60 x 60 | 9 | 7.89 |
| 63 x 63 | 5 | 4.78 |
| 63 x 63 | 6 | 5.69 |
| 63 x 63 | 7 | 6.58 |
| 63 x 63 | 8 | 7.46 |
| 63.5 x 63.5 | 4.76 | 4.60 |
| 63.5 x 63.5 | 6.35 | 6.05 |
| 63.5 x 63.5 | 9.52 | 8.84 |
| 65 x 65 | 5 | 4.94 |
| 65 x 65 | 6 | 5.88 |
| 75 x 75/76.2 x 76.2 | 5 | 5.73 |
| 75 x 75/76.2 x 76.2 | 6 | 6.83 |
| 75 x 75/76.2 x 76.2 | 9 | 10.03 |
| 75 x 75/76.2 x 76.2 | 10 | 11.06 |
| 80 x 80 | 6 | 7.30 |
| 80 x 80 | 8 | 9.61 |
| 100/101.6 MM | 6 | 9.20 |
| 100/101.6 MM | 9 | 13.58 |
| 100/101.6 MM | 10 | 15.01 |
| 120 x 120 | 10 | 18.17 |
| 120 x 120 | 12 | 21.61 |
| 120 x 120 | 13 | 23.31 |
| 120 x 120 | 15 | 26.66 |
| 125 x 125 | 10 | 18.96 |
| 125 x 125 | 12 | 22.56 |
| 127 x 127 | 9.52 | 18.39 |
| 127 x 127 | 12.7 | 24.21 |

Density 7.90 g/cm³, the section treated as the two legs with the overlap counted once. Root fillets and toe radii are not in the formula, so a rolled angle weighs 1.3 to 2.8 percent more than the figure shown.

## Ordering AISI 316 equal angle

An enquiry for this section is complete when it states the grade and governing standard (AISI 316 to EN 10088-3 or ASTM A276), the condition (annealed and pickled), the leg width and thickness with the tolerance to EN 10056-2 or ASTM A484, the cut length, the quantity, the certificate type to EN 10204, and any test to be reported, such as PMI confirmation of grade.

## Other grades in Equal Angles

- [**AISI 304** The general purpose austenitic stainless steel](https://www.laxconsteels.com/products/hrap-equal-angles/aisi-304/)
- [**AISI 310S** A high-chromium, high-nickel austenitic grade for continuous service](https://www.laxconsteels.com/products/hrap-equal-angles/aisi-310s/)

## AISI 316 in other forms

- [**Hot Rolled Round Bars** hot rolled round bar](https://www.laxconsteels.com/products/hot-rolled-round-bars/aisi-316/)
- [**Threaded Bars** threaded bar](https://www.laxconsteels.com/products/threaded-bars/aisi-316/)
- [**HRAP Flat Bars** flat bar](https://www.laxconsteels.com/products/hrap-flat-bars/aisi-316/)
- [**Hexagonal Bright Bars** hexagonal bright bar](https://www.laxconsteels.com/products/hexagonal-bright-bars/aisi-316/)

[HRAP Equal Angles: every size](https://www.laxconsteels.com/products/hrap-equal-angles/) [AISI 316 composition and equivalents](https://www.laxconsteels.com/grades/aisi-316/) [Weight calculator](https://www.laxconsteels.com/weight-calculator/) [Send the RFQ](https://www.laxconsteels.com/contact/?product=hrap-equal-angles)