303 stainless steel is a corrosion resistant, austenitic chrome-nickel stainless steel with average mechanical properties that is conditionally acid resistant.

Select Your Steel Length

Imperial
steel type image

$mart Flat Stock [$mart]

Standardized Precision Blanks

steel type image

Cold Finished Rounds [CF]

Precision Round Bars

Metric
steel type image

$mart Flat Stock Metric [$martM]

Standardized Precision Blanks Metric

steel type image

Cold Finished Rounds Metric [CFM]

Precision Round Bars Metric

You can easily reach out to one of our order consultants to find the exact steel products you need.
Let's Talk
Icon of an atom

Standard values

Working hardness: 215 HB - 250 HB (delivery condition)
Delivery condition: max. 250 HB

Chemical composition in %

C

0.000000

0

0.100000

0.1
Si

0.000000

0

1.000000

1
Mn

0.000000

0

2.000000

2
P

0.000000

0

0.045000

0.045
S

0.150000

0.15

0.350000

0.35
Cr

17.000000

17

19.000000

19
Ni

8.000000

8

10.000000

10
Cu

0.000000

0

1.000000

1
N

0.000000

0

0.110000

0.11
Icon of a spanner

Technical properties

Corrosion resistant austenitic stainless chrome-nickel-steel with additional sulphur content that allows excellent milling, however, not forgeable, non-weldable (cracking), limited polishing properties. Average mechanical properties, non-magnetisable and conditionally acid resistant.

Icon of a check mark

Applications

food industry, photographic industry, paint industry, oil industry, soap industry, paper industry, textile industry, mechanical engineering, turned parts, fittings construction, kitchen equipment, decoration

Chemical designation: Working hardness: 215 HB - 250 HB (delivery condition)
Delivery condition: max. 250 HB

C

0.000000

0

0.100000

0.1
Si

0.000000

0

1.000000

1
Mn

0.000000

0

2.000000

2
P

0.000000

0

0.045000

0.045
S

0.150000

0.15

0.350000

0.35
Cr

17.000000

17

19.000000

19
Ni

8.000000

8

10.000000

10
Cu

0.000000

0

1.000000

1
N

0.000000

0

0.110000

0.11

Corrosion resistant austenitic stainless chrome-nickel-steel with additional sulphur content that allows excellent milling, however, not forgeable, non-weldable (cracking), limited polishing properties. Average mechanical properties, non-magnetisable and conditionally acid resistant.

food industry, photographic industry, paint industry, oil industry, soap industry, paper industry, textile industry, mechanical engineering, turned parts, fittings construction, kitchen equipment, decoration

General Information

As with other austenitic stainless steels, 303 has good toughness and is non-magnetic. The added sulphur makes the steel better machinable but affects the corrosion resistance in comparison to for example 304, and lowers the toughness of the steel slightly.

 

Applications

Applications for this tool steel include: shafts, springs bushings, nuts and bolts, valves.

 

Corrosion resistance

Sulphur makes this steel grade vulnerable to pitting corrosion, therefore should be avoided for environments over 140°F (60°C) containing chloride. This steel grade is better suited in mild environments, when exposed to moist environments, like a marine environment, pitting as well as a film of rust will form.

 

Heat resistance

303 stainless steel has good oxidation resistance when the material is sporadically exposed to temperatures of 1400°F (760°C) as well as continuous service at 1598°F (870°C). The latter is not recommended, as this steel grade is sensitive to carbide precipitation with continuous use at a temperature range of 797-1580°F (425-860°C).

 

Heat treatment

303 is not hardenable by heat treatment. Cold working this steel grade can increase hardness and tensile strength.

 

Annealing

Heat the material to 1850°F (1010°C) following with a quenching in water or cool rapidly by other means. To prevent embrittlement and loss of corrosion resistance, temperatures between 800-1500°F (427-816°C) should be avoided for prolonged exposure.

 

Hardening

This steel grade cannot be hardened by heat treatment. This steel grade can be cold work hardened for improved strength and hardness.

 

Cold working

303 cannot be readily be cold worked, some cold work is possible but sharp bending should not be applied. As an alternative 304 can be used for cold working.

 

Hot working

Uniformly heat the material to 2100-2300°F (1149-1260°C) for hot working, when finished, rapidly cool the work piece to ensure the maximum corrosion resistance.

 

Machinability

To avoid excess work hardening keep the cutting edges sharp. Lubricants and coolants should be used liberally to avoid the heat concentration at the cutting edges. Chip breakers should be employed to keep the work piece clear.

 

Weldability

It is not recommended to weld this steel grade.

 

Forging

This steel grade is not easily forged due to the risk of overheating with the high forging temperatures needed. Forging is usually performed at a temperature range of 2102-1742°F (1150-950°C) with subsequent cooling in air. To minimizing the risk of hot cracking low forging temperatures are preferred.

 

Fabrication

To avoid cross contamination while fabricating, only tools dedicated to stainless steel materials should be used to avoid surface discoloration of the fabricated products. Clean all tooling and work surfaces thoroughly against cross contamination as well.

Disclaimer

The data shown here has been compiled with the greatest diligence and is regularly updated with regard to the correctness and completeness of its content. The content is indicative only and should not be taken as a warranty of specific properties of the product described or a warranty of suitability for a particular purpose. All information presented is given in good faith and no liability will be accepted for actions taken by third parties in reliance on this information. ABRAMS Industries reserves the right to change or amend the information given here in full or parts without prior notice.