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304 & 316 The Best Machining Grade


304 stainless steel grade:
Ni - 9.25, Cr - 19.0, Fe - Balance, Si - 1.00, Mn - 2.00, C - 0.080, P - 0.045, S - 0.030

Stainless Steel 304 Chemical Properties:
It is still sometimes referred to by its old name 18/8 which is derived from the nominal composition of type 304 being 18% chromium and 8% nickel.

Stainless steel 304 is an austenitic grade that can be severely deep drawn. This property has resulted in 304 being the dominant grade used in applications like sinks and saucepans.

Type 304L is the low carbon version of Stainless steel 304. It is used in heavy gauge components for improved weldability. Some products such as plate and pipe may be available as “dual certified” material that meets the criteria for both 304 and 304L.

304H, a high carbon content variant, is also available for use at high temperatures.

Property data given in this document is typical for bar products covered by EN 10269:2013. ASTM, EN or other standards may cover products sold. It is reasonable to expect specifications in these standards to be similar but not necessarily identical to those given in this datasheet.

316 Stainless Steel Grade:

Chemical Formula Of 316 Stainless Steel Grade:

Fe, <0.03% C, 16-18.5% Cr, 10-14% Ni, 2-3% Mo, <2% Mn, <1% Si, <0.045% P, <0.03% S

Grade 316 is the standard molybdenum-bearing grade, second in importance to 304 amongst the austenitic stainless steels. The molybdenum gives 316 better overall corrosion resistant properties than Grade 304, particularly higher resistance to pitting and crevice corrosion in chloride environments.

Grade 316L, the low carbon version of 316 and is immune from sensitization (grain boundary carbide precipitation). Thus it is extensively used in heavy gauge welded components (over about 6mm). There is commonly no appreciable price difference between 316 and 316L stainless steel.

The austenitic structure also gives these grades excellent toughness, even down to cryogenic temperatures.

Compared to chromium-nickel austenitic stainless steels, 316L stainless steel offers higher creep, stress to rupture and tensile strength at elevated temperatures.

Corrosion Resistance:

Excellent in a range of atmospheric environments and many corrosive media - generally more resistant than 304.

Key Properties

These properties are specified for the flat-rolled product (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.

Applications

Typical applications include:

• Food preparation equipment particularly in chloride environments.
• Pharmaceuticals
• Marine applications
• Architectural applications
• Medical implants, including pins, screws and orthopedic implants like total hip and knee replacements
• Fasteners

For any special range of stainless steel bar requirement welcome to Vishwa Stainless Pvt. Ltd.

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