---
title: "316 Stainless Steel Round Bar, 16 to 125 mm | Laxcon Steels"
source: "https://www.laxconsteels.com/products/hot-rolled-round-bars/aisi-316/"
description: "AISI 316 stainless steel hot rolled round bar, made to order by Laxcon Steels, India: composition, equivalents, weight per metre and tolerances."
---
# AISI 316 Round Bars

*[Home](https://www.laxconsteels.com/) > [Products](https://www.laxconsteels.com/products/) > [Hot Rolled Round Bars](https://www.laxconsteels.com/products/hot-rolled-round-bars/) > AISI 316*

AISI 316 hot rolled round bar is a molybdenum-bearing austenitic bar for parts that work in chlorides, such as marine shafts and valve stems.

16 to 125 mm Austenitic stainless steel Made to order

## AISI 316 hot rolled round bar

AISI 316 hot rolled round bar is an austenitic stainless bar rolled from a grade that carries 2 to 3 percent molybdenum beside its chromium and nickel. The molybdenum is the reason the grade exists: it slows pitting and crevice attack, the localised corrosion that chloride ions start in seawater, brine and many process liquors. AISI 304 holds no molybdenum and is the choice where the medium is fresh water, food or mild chemicals. Where chlorides are present and the bar must still be simple to machine and weld, 316 is the usual step up. Beside it sit AISI 316L, whose lower carbon protects a welded joint from attack at the grain boundaries, and duplex grades such as 2205, which give a higher yield strength.

The bar is supplied solution annealed: a soak above 1,000 degrees Celsius dissolves the chromium carbides and a fast cool keeps them dissolved. The annealed bar is non-magnetic, takes no hardening from heat treatment and gains strength only when it is cold worked; ASTM A276 puts its minima at 515 MPa tensile and 205 MPa yield. The grade work hardens under the tool, so turning it asks for a firm feed, sharp edges and lower speeds than carbon steel. It is welded without preheat. Round bar in this grade is machined into pump and valve shafts, marine fasteners, chemical plant fittings, and flanges and nozzles for process pipework.

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 hot rolled round bar supply conditions

| Property | Value |
| --- | --- |
| Size range | 16 mm - 125 mm (5/8" - 5") |
| Length | Up to 8 metres |
| Tolerances | ASTM A484, EN10060 |
| Heat treatment | Solution annealing |
| 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 10060 | Hot rolled round steel bars for general purposes: dimensions and tolerances on shape and dimensions. |
| 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. |
| ASTM A479/A479M | Stainless steel bars and shapes for use in boilers and other pressure vessels: the bar specification a pressure-part drawing calls for. |
| ASTM A314 | Stainless steel billets and bars for forging. |
| NACE MR0175 / ISO 15156 | Materials for use in H2S-containing environments in oil and gas production: the sour-service limits on hardness and condition. |
| 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

| Diameter (mm) | kg per metre | Metres per tonne |
| --- | --- | --- |
| 16 | 1.59 | 629.5 |
| 17 | 1.79 | 557.6 |
| 18 | 2.01 | 497.4 |
| 19 | 2.24 | 446.4 |
| 20 | 2.48 | 402.9 |
| 21 | 2.74 | 365.4 |
| 22 | 3.00 | 333.0 |
| 23.2 | 3.34 | 299.4 |
| 24 | 3.57 | 279.8 |
| 25 | 3.88 | 257.9 |
| 26 | 4.19 | 238.4 |
| 27 | 4.52 | 221.1 |
| 28 | 4.86 | 205.6 |
| 30 | 5.58 | 179.1 |
| 32 | 6.35 | 157.4 |
| 34 | 7.17 | 139.4 |
| 36 | 8.04 | 124.4 |
| 37 | 8.49 | 117.7 |
| 38 | 8.96 | 111.6 |
| 40 | 9.93 | 100.7 |
| 42 | 10.95 | 91.4 |
| 45 | 12.57 | 79.6 |
| 47 | 13.71 | 73.0 |
| 48 | 14.30 | 69.9 |
| 50 | 15.51 | 64.5 |
| 53 | 17.43 | 57.4 |
| 56 | 19.46 | 51.4 |
| 57.5 | 20.52 | 48.7 |
| 60 | 22.34 | 44.8 |
| 63 | 24.63 | 40.6 |
| 66 | 27.03 | 37.0 |
| 67.5 | 28.27 | 35.4 |
| 70 | 30.40 | 32.9 |
| 73.5 | 33.52 | 29.8 |
| 75 | 34.90 | 28.7 |
| 77.5 | 37.27 | 26.8 |
| 80 | 39.71 | 25.2 |
| 83 | 42.75 | 23.4 |
| 85 | 44.83 | 22.3 |
| 88 | 48.05 | 20.8 |
| 90 | 50.26 | 19.9 |
| 93 | 53.67 | 18.6 |
| 95 | 56.00 | 17.9 |
| 98 | 59.59 | 16.8 |
| 100 | 62.05 | 16.1 |
| 105 | 68.41 | 14.6 |
| 106 | 69.72 | 14.3 |
| 110 | 75.08 | 13.3 |
| 115 | 82.06 | 12.2 |
| 120 | 89.35 | 11.2 |
| 125 | 96.95 | 10.3 |

Density 7.90 g/cm³, diameter squared x 0.006205. Sizes are the published range at the nominal diameters shown.

## Ordering AISI 316 hot rolled round bar

An enquiry for this grade in this form states the grade and the governing standard, for example AISI 316 to ASTM A479 or EN 10088-3, the condition as rolled, spot ground or fully ground, the diameter with the tolerance to ASTM A484 or EN 10060, the cut length, the quantity, the test certificate type to EN 10204, and any test called for, such as ultrasonic testing or PMI confirmation of the grade. Laxcon Steels rolls the bar to order.

## Other grades in Round Bars

- [**AISI 304** The general purpose austenitic stainless steel](https://www.laxconsteels.com/products/hot-rolled-round-bars/aisi-304/)
- [**EN 8** A medium-carbon unalloyed engineering steel](https://www.laxconsteels.com/products/hot-rolled-round-bars/en-8/)
- [**Duplex 2205** The standard duplex stainless steel](https://www.laxconsteels.com/products/hot-rolled-round-bars/duplex-2205/)
- [**SAE 4140** The chromium-molybdenum through-hardening steel](https://www.laxconsteels.com/products/hot-rolled-round-bars/sae-4140/)
- [**AISI 303** The free-machining austenitic grade](https://www.laxconsteels.com/products/hot-rolled-round-bars/aisi-303/)
- [**AISI 316L** The low-carbon version of AISI 316](https://www.laxconsteels.com/products/hot-rolled-round-bars/aisi-316l/)
- [**AISI 410** The basic martensitic stainless steel](https://www.laxconsteels.com/products/hot-rolled-round-bars/aisi-410/)
- [**SAE 4340** The nickel-chromium-molybdenum through-hardening steel](https://www.laxconsteels.com/products/hot-rolled-round-bars/sae-4340/)
- [**AISI 416** The free-machining martensitic grade](https://www.laxconsteels.com/products/hot-rolled-round-bars/aisi-416/)
- [**17-4 PH** The precipitation hardening stainless steel](https://www.laxconsteels.com/products/hot-rolled-round-bars/17-4-ph/)
- [**AISI 420** A higher-carbon martensitic stainless steel](https://www.laxconsteels.com/products/hot-rolled-round-bars/aisi-420/)
- [**AISI 431** A martensitic stainless steel with nickel](https://www.laxconsteels.com/products/hot-rolled-round-bars/aisi-431/)
- [**AISI 304L** The low-carbon version of AISI 304](https://www.laxconsteels.com/products/hot-rolled-round-bars/aisi-304l/)
- [**AISI 430** The standard ferritic stainless steel](https://www.laxconsteels.com/products/hot-rolled-round-bars/aisi-430/)
- [**EN 24** A nickel-chromium-molybdenum engineering steel for heavy sections](https://www.laxconsteels.com/products/hot-rolled-round-bars/en-24/)
- [**Super duplex 2507** A super duplex stainless steel](https://www.laxconsteels.com/products/hot-rolled-round-bars/super-duplex-2507/)
- [**AISI 310S** A high-chromium, high-nickel austenitic grade for continuous service](https://www.laxconsteels.com/products/hot-rolled-round-bars/aisi-310s/)
- [**AISI 321** AISI 304 stabilised with titanium](https://www.laxconsteels.com/products/hot-rolled-round-bars/aisi-321/)
- [**EN 19** A chromium-molybdenum engineering steel](https://www.laxconsteels.com/products/hot-rolled-round-bars/en-19/)

## AISI 316 in other forms

- [**HRAP Equal Angles** equal angle](https://www.laxconsteels.com/products/hrap-equal-angles/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/)

[Hot Rolled Round Bars: every size](https://www.laxconsteels.com/products/hot-rolled-round-bars/) [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=hot-rolled-round-bars)