303 STAINLESS STEEL UNS 30300

303 Stainless Steel is the most machinable of the austenitic grades of stainless steel. With the addition of Sulfur to this grade, the sulfur enhances the alloy's machinability which is ordinarily difficult to machine.

Applications: 303 Stainless Steel is widely used in manufacture of shafts, valve bodies, valve trim and food industry applications where 304 stainless would be normally used. 303 Stainless steel properties make it resistant to atmospheric corrosion, food products, sterilization solutions and many organic chemicals as well as a variety of inorganic chemicals.

Chemistry Analysis

Carbon	0.12%	Manganese	2.00%
Phosphorus	0.20%	Sulfur	0.15%
Silicon	1.00%	Chromium	17.00 - 19.00%
Nickel	8.00 - 10.00%	Iron	67.53 - 71.53%

Corrosion Resistance for 303 Stainless Steel Pipe

Intergranular corrosion may be compromised if the 303 stainless steel material is heated between 800 degrees F (427 c) and 1650 F (899 C) or cooled slowly through that range.

The following table is for reference only, many factors can affect the corrosive resistance. A corrosion test for each application should be applied.

Phosphoric acid	Moderate	Acetic Acid	Moderate
Sodium Hydroxide	Moderate	Sea Water	Restricted
Salt Spray	Moderate	Nitric Acid	Good
Sulfuric Acid	Moderate	Humidity	Excellent

Typical Elevated Temperature Mechanical Properties

303 Stainless Steel annealed condition 1900f (1038C)

		Short Time Tensile Tests						Creep Tests
Test Temperature		0.2% Yield Strength		Ultimate Tensile Strength		% Elongation in 2” (50.8mm)	% Reduction in area	Stress in 1% Creep in 10,000 Hours
F	C	ksi	Mpa	ksi	Mpa			ksi	Mpa
70	21	35	241	90	621	50	55	-	-
800	427	21	145	61	421	35	51	-	-
1000	538	19	131	55	379	34	55	17	117
1200	549	17	117	45	310	30	54	7	48
1400	760	14	97	30	207	31	45	2	14
1600	871	10	69	20	138	34	43	-	-

Typical Room Temperature Mechanical Properties 303 Stainless Steel

Annealed 1900f (1038c) 1” rd 303 stainless steel bar

0.2% Yield Strength		Ultimate Tensile Strength		% Elongation in 2” (50.8mm)	% Reduction of Area	Brinell Hardness	Impact Strength
ksi	Mpa	ksi	Mpa				Izod	Charp V-notch
35	241	90	621	50	55	160	80 ft-lb	70 ft-lb

Heat Treatment for 303 SS

Annealing: Heat to 1850/1950 F (1010/1066c) and quench in water. Brinell hardness approximately 160.

Hardening: Cannot be hardened by heat treatment. Cold working this alloy increases its strength and hardness.

Machinability: 303 Stainless Steel machines easily with a brittle chip. Grinding and polishing are possible with 303 Stainless Steel with satisfactory results.

Our forging operation can increase the results for polishing this grade.

Specifications: AMS 5640 ASTM A473 ASTM A582 EN10204 DIN3.1BShapes

Manufactured: Flat Bars, Square Bars, Round Bars, 303 stainless steel flange, Hollows, Discs, Blocks and special Shapes. Send us a drawing to see how we can save you material and machining time!

The information in this data sheet is for information only and should not be used for engineering.

Source: yaang.com

For more information on this source please visit: https://www.yaang.com .

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