316L Stainless Steel Plate 2000mm Width ASTM Corrosion Resistance Hot Rolled

Product Specification

316L stainless steel plate hot rolled pickled and annealed 2000mm width ASTM standard

Description:

Grade 316 is the standard molybdenum-bearing austenitic grade, second stainless steel in importance to 304. The molybdenum gives 316 better overall corrosion resistant properties than Grade 304, particularly higher resistance to pitting and crevice corrosion in chloride environments. It is readily brake or roll formed, welded, soldered and cut by both thermal and mechanical methods. The austenitic structure gives excellent toughness, even down to cryogenic temperatures.
Grade 316L, the low carbon version of 316, is highly resistant to sensitisation (grain boundary carbide precipitation) and so is extensively used in heavy gauge welded components (about 5mm and over). Grade 316H, with its higher carbon content has some application at elevated temperatures, as does stabilised grade 316Ti. Nitrogen-strengthened versions also exist as 316N and 316LN. Only 316 and 316L are readily available in stock.
 

Corrosion Resistance
Excellent in a range of atmospheric environments and many corrosive media - generally more resistant than 304. Subject to pitting and crevice corrosion in warm chloride environments, and to stress corrosion cracking above about 60°C. Considered resistant to pitting corrosion in potable water with up to about 1000mg/L chlorides at ambient temperatures, reducing to about 300mg/L at 60°C.
316 is usually regarded as the standard “marine grade” stainless steel, but it is not fully resistant to sea water. In many marine environments 316 does exhibit surface corrosion, usually visible as brown staining. This is particularly associated with crevices and rough surface finish. Consult hao Technical Assistance for specific environmental recommendations.
There is usually no difference in corrosion resistance between 316 and 316L.

Specified Properties

These properties are specified for flat rolled product (316L stainless steel plate, sheet and coil) in ASTM A240/A240M. Similar but not necessarily identical properties are specified for other products such as pipe and bar in their respective specifications. 

Composition Specification (%)

Mechanical Property Specification

Physical Properties (typical values in the annealed condition)

Grade Specification Comparison

Welding
Excellent weldability by all standard fusion methods, both with and without filler metals. AS 1554.6 pre-qualifies welding of 316 with Grade
316 and 316L with Grade 316L rods or electrodes (or their high silicon equivalents). Heavy welded sections in Grade 316 require post-weld annealing for maximum corrosion resistance. This is not required for 316L. Grade 316Ti may also be used as an alternative to 316 for heavy section welding.

Machining
A “Ugima” improved machinability version of grade 316 is available in round and hollow bar products. Ugima machines significantly better than standard 316 or 316L, giving higher machining rates and lower tool wear in many operations.

“Dual Certification”
It is common for 316 and 316L to be stocked in “Dual Certified” form, particularly in plate, pipe and round bar. These items have chemical and mechanical properties complying with both 316 and 316L specifications. Such dual certified product may be unacceptable for high temperature applications.

Typical Applications
Food processing equipment. Laboratory equipment. Architectural panelling, railings & trim. Boat fittings. Chemical containers. Heat exchangers. Screens for mining, quarrying & water filtration. Threaded fasteners. Springs.

Packing