303 Stainless Steel Bar

303 (UNS 30300) stainless steel bars were developed for machining. Type 303 has a higher concentration of sulfur reducing the drag on cutting tools. It allows greater machining speeds and lower production costs. The alloy is useful whenever a need arises for good corrosion resistance and considerable machining is required.

Austenitic steels have austenite as their primary phase (face centered cubic crystal). These are alloys containing chromium and nickel (sometimes manganese and nitrogen), structured around the Type 302 composition of iron, 18% chromium, and 8% nickel. Austenitic steels are not hardenable by heat treatment. The most familiar stainless steel is probably Type 304, sometimes called T304 or simply 304. Type 304 surgical stainless steel is austenitic steel containing 18-20% chromium and 8-10% nickel.

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Thickness
Specification
OD
Manufacture Method
Shape
Grade
Diameter

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SKU Description DFARS Manufacture Method Diameter Shape Specification
Sku: A4133 Description: DFARS: No Manufacture Method: Air Melt Diameter: Shape: Specification: AMS5640 ASTM A582
Sku: A1976 Description: SBR 303 ASTM A582 6.2500 DFARS: No Manufacture Method: Air Melt Diameter: Shape: Specification: ASTM A582
Sku: 80240 Description: SBR 303 ASTM A582 .6250 DFARS: No Manufacture Method: Air Melt Diameter: Shape: Specification: AMS5640 ASTM A582
Sku: 80236 Description: SBR 303 ASTM A582 .3750 DFARS: No Manufacture Method: Air Melt Diameter: Shape: Specification: AMS5640 ASTM A582
Sku: 80232 Description: SBR 303 ASTM A582 .2500 DFARS: No Manufacture Method: Air Melt Diameter: Shape: Specification: AMS5640 ASTM A582
Sku: 57520 Description: SBR 303 AMS 5640 3.5000 DFARS: No Manufacture Method: Air Melt Diameter: Shape: Specification: AMS 5640 UNS S30300
Sku: 54267 Description: SBR 303 AMS 5640 3.7500 DFARS: No Manufacture Method: Air Melt Diameter: Shape: Specification: AMS 5640 UNS S30300
Sku: 94074 Description: SBR 303 ASTM A582 3.1250 DFARS: No Manufacture Method: Air Melt Diameter: Shape: Specification: ASTM A582
Sku: 76388 Description: SBR 303 AMS 5738 1.2500 DFARS: No Manufacture Method: Air Melt Diameter: Shape: Specification: AMS5738
Sku: 07827 Description: SBR 303 AIRM AMS5640 .6250 x 12 FT R/L DFARS: Yes Manufacture Method: Air Melt Diameter: Shape: Specification: AMS5640 ASTM A582

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Available shapes: Hexes, Rounds, Squares

Specifications: ASTM A582, AMS 5640, AMS QQ-S-764B Cond A

Typical Chemical Properties
Minimum Properties
Tensile Strength , psi 85,000
Yield Strength, psi 45,000
Elongation 50%
Hardness Rb 180
Chemistry
Carbon( C) .15 max
Chrome (Cr) 17.0- 19.0
Manganese (Mn) 2.0 max
Nickel ( Ni) 8.0 -10.0
Phosphorus (P) 0.20 max
Sulphur (S) .15 min
Silicon (Si) 1.00 max