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[China]
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Address: No.283-1, Youyi Middle Road, Xishan District, Wuxi City, Jiangsu Province
Contact name:Gao
JIANGSU MITTEL STEEL INDUSTRIAL LIMITED |
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Bright Anneal SS303 Stainless Steel Round Bar Diameter 3 - 60.0mm UNS S30300 Stainless Steel
| Products | Stainless Steel Bar |
| Grade | 201 303 304 304L 309S 310S 316L 316Ti 317L 321 347 410 420 430 431 17-4PH 2205 2507 904L C276.etc |
| Finishing | Bright / Black |
| Diameter | 3 - 300mm |
| Length | 6m or custom cutting as request |
| Service | Cutting. Polishing, heat treatment |
| MOQ | 200 Kgs |
| Deliver time | 10 - 15 Days based on the quantity |
| Packing | wooden box, or packing as request |
| Loading Port | Shanghai Port. Ningbo Port |
| Other Shape | Round, Square, Flatness, Hexagonal , Angle, Channel |
| Company Type | Factory |
AISI 303 stainless steel (UNS S30300) was developed for easy cutting and basically belongs to 18-8 stainless steel. It improves the cutting performance while maintaining good mechanical properties. SS 303 material has a higher sulfur content, which reduces the resistance on the cutting tool, but has a negative impact on the corrosion resistance, so the corrosion resistance is not as good as AISI 304 stainless steel.
The following datasheet give 303 stainless steel properties including chemical composition, physical and mechanical properties, heat treatment, welding, etc.
SS 303 material chemical composition is listed in the following table based on cast analysis.
| Chemical Composition, % | |||||||||
| ASTM | AISI (UNS) | C, ≤ | Si, ≤ | Mn, ≤ | P, ≤ | S, ≥ | Cr | Ni | Notes |
| ASTM A582/A582M | 303 (UNS S30300) | 0.15 | 1.00 | 2.00 | 0.20 | 0.15 | 17.0-19.0 | 8.0-10.0 | Free-Machining Stainless Steel Bars |
| ASTM A581/A581M | Free-Machining Stainless Steel Wire and Wire Rods | ||||||||
| ASTM A895 | Free-Machining Plate, Sheet, and Strip | ||||||||
| ASTM A959 | Wrought Stainless Steels | ||||||||
| ASTM A473 | Stainless Steel Forgings | ||||||||
| ASTM A314 | Billets and bars for forging | ||||||||
Notes:
AISI 303 stainless steel physical properties are given in the following lists, including density, thermal expansion, elastic modulus, thermal conductivity, specific heat capacity and electrical resistance.
Notes:
| Physical Properties | |
| 303 stainless steel density, g/cm3 (lb/in.3) | 7.9 (0.29) |
| Melting point, °C (°F) | 1400-1450 (2550-2590) |
| Specific heat capacity, J/kg·K (Btu/lb ·°F) | 500 (0.12) at 20℃ |
| Electrical resistivity, μΩ·m | 0.72 at 20℃ |
| Magnetic permeability | 1.02 (Approximate) |
| Elastic modulus, GPa (106 psi) | 193 (28) |
| Thermal conductivity, W/m·K (Btu/ft · h ·°F) | 16.2 (9.4) at 100 °C (212 °F) |
| 21.5 (12.4) at 500 °C (932 °F) | |
| Coefficient of thermal expansion, 10-6/K (μin./in. ·°F) | 17.2 (9.6) at 0-100 ℃ (32-212 °F) |
| 17.8 (9.9) at 0-315 ℃ (32-600 °F) | |
| 18.4 (10.2) at 0-538 ℃ (32-1000 °F) | |
Magnetic: SS 303 is non-magnetic in the annealed condition, but may become slightly magnetic due to cold working.
303 steel mechanical properties at room temperature are listed in the following tables.
| AISI 303 Mechanical Properties | ||||||
| ASTM | AISI | Conditions | Tensile Strength, MPa (ksi), ≥ | 0.2% Yield Strength, MPa (ksi), ≥ | Elongation in 50 mm (2 in.), %, ≥ | Reduction of Area, %, ≥ |
| ASTM A473 | 303 (UNS S30300) | Annealed | 515 (75) | 205 (30) | 40 | 50 |
| ASTM A581/A581M | Annealed | 585-860 (85-125) | ||||
| Cold Worked | 795-1000 (115-145) | |||||
Brinell Hardness:
Recommended annealing temperatures for AISI 303 wrought stainless steel is 1040 °C (1900 °F).
Typical forging temperature range is 925-1260 °C (1700-2300 °F), (C: 0.08%; S: 0.30%)
Hardening: SS 303 cannot be hardened by heat treatment, but can be hardened by cold working.
Due to the high P and S content, SS 303 material is not recommended for welding. If welding cannot be avoided, AWS E312 filler metal may be considered.
Increased tool life attained with coated cutting tools
| Cutting tool | Coating | Workpiece material | Workpieces machined before resharpening | ||
| Type | High-speed tool steel, AISI type | Uncoated | Coated | ||
| Broach insert | M3 | TiN | Type 303 stainless steel | 100,000 | 300,000 |
| Form tool | T15 | TiN | 1,840 | 5,890 | |
Recommended face angles, along with backoff angles for type 303 stainless steel:
Speed and feed ranges for the spade drilling are listed in the following table.
| Material drilled | Drill diameter, mm (in.) | |||||||||
| 25 (1) | 50 (2) | 75 (3) | 100 (4) | 125 (5) | ||||||
| Speed, rev/min | Feed rate, mm/rev (in./rev) | Speed, rev/min | Feed rate, mm/rev (in./rev) | Speed, rev/min | Feed rate, mm/rev (in./rev) | Speed, rev/min | Feed rate, mm/rev (in./rev) | Speed, rev/min | Feed rate, mm/rev (in./rev) | |
| Type 303 and 303 Se | 225-275 | 0.15-0.25 (0.006-0.010) | 120-125 | 0.25-0.38 (0.010-0.015) | 75-90 | 0.38-0.51 (0.015-0.020) | 55-65 | 0.51-0.63 (0.020-0.025) | 45-55 | 0.63-0.76 (0.025-0.030) |
Recommended cutting parameters for indexable drills with uncoated and titanium-coated carbide inserts
| Material | Drill size | Speed | Feed | Insert style | Grade | |||||
| Standard length | Stub length | |||||||||
| mm | in. | m/min | sfm | m/min | sfm | mm/rev | in./rev | |||
| AISI 303, 304 and 316, 416 | 19-30 | .75 – 1.1875 | 45-105 | 150-350 | 45-150 | 150-500 | 0.08-0.10 | 0.003-0.004 | SPGM | C-2, Uncoated |
| 32-36.5 | 1.25-1.4375 | 0.10-0.13 | 0.004-0.005 | SNMG | C-5, Titanium coated. | |||||
| 38-47.5 | 1.50-1.875 | 0.10-0.15 | 0.004-0.006 | SNMMND | ||||||
| 49-75 | 1.9375-3 | 0.13-0.20 | 0.005-0.008 | SNMMND | ||||||
Nominal speeds and feeds for thread milling with high-speed steel tools
| Work material | Hardness, HB | Speed | Feed | ||
| m/min | sfm | mm/tooth | in./tooth | ||
| Type 303 | 135-185 | 30 | 100 | 0.05 | 0.002 |
| 225-275 | 27 | 90 | 0.04 | 0.0015 | |
Nominal speeds for die cutting of screw threads
| Work metal | Speed for pitch of | |||||||
| ≤ 7 | 8-15 | 16-24 | ≥ 25 | |||||
| m/min | sfm | m/min | sfm | m/min | sfm | m/min | sfm | |
| Types 303, 410, 420F, 440F | 3 | 10 | 4.5 | 15 | 6 | 20 | 7.5 | 25 |
Nominal speed, cutting rate, and band life for the cutoff band sawing of steel bars
| Steel being cut | Hardness, HB | Band speed | Cutting rates | Band life in terms of total area cut | |||
| m/min | sfm | mm2 x 103/min | in.2/min | mm2 × 106 | in.2 × 103 | ||
| SS 303, 303F | 150-200 | 40-27 | 130-90 | 3.2-1.3 | 5-2 | 2.1 | 3.3 |
SS303 material is mainly used for parts that need machining, grinding or polishing, suitable for rapid cutting to make rolls, shafts, bolts, nuts, etc.
SS 303 stainless steel equivalent materials are listed in the datasheet below, including European (German DIN, British BSI, France NF), Japanese JIS and Chinese GB standard (for reference).
| AISI 303 stainless steel equivalent material | |||||||||
| US | European Union | ISO | Japan | China | |||||
| Standard | AISI Type (UNS) | Standard | Grade (Steel Number) | Standard | ISO Name (ISO Number) | Standard | Grade | Standard | Grade |
| AISI SAE; ASTM | 303 (UNS S30300) | EN 10088-2; EN 10088-3 | X8CrNiS18-9 (1.4305) | ISO 15510 | X10CrNiS18-9 (4305-303-00-I) | JIS G4303; JIS G4304; JIS G4309; | SUS303 | GB/T 20878; GB/T 4237; GB/T 3280 | Y1Cr18Ni9; Y12Cr18Ni9 (New designation) |
