416 Stainless Steel Round Bar
Grade: 416/UNS S41600
Size:
Cold drawn: φ4mm-φ60mm
Hot Rolled: φ16mm-φ230mm
Forged: φ230mm-φ1200mm
Surface Finish: Black Annealed, Polished Bright, Centerless Grinding
Diameter Tolerance: H9, H11, h9, h11 etc
- Fast Shipping / Ready Stock
- ISO 9001 Direct Factory
- Custom Cutting & Processing
- 100% MTC & SGS Inspection Supported
416 stainless steel is a free-machining martensitic chromium stainless steel grade designated as UNS S41600. It is specifically developed to provide excellent machinability while maintaining the strength, hardness, and corrosion resistance characteristics of martensitic stainless steels. With the addition of sulfur, 416 stainless steel offers significantly improved machining performance compared with conventional 410 stainless steel, making it one of the most widely used free-machining stainless steel grades.
The alloy contains chromium as the primary corrosion-resistant element, which forms a passive chromium oxide layer that provides resistance to atmospheric corrosion and mild chemical environments. The sulfur addition creates manganese sulfide inclusions within the microstructure, reducing cutting forces, improving chip breaking, and extending tool life during machining operations. However, the sulfur content slightly reduces corrosion resistance and toughness compared with non-free-machining grades.
416 stainless steel bars are normally supplied in annealed condition for machining and can be hardened through quenching and tempering processes to achieve higher strength and hardness. After heat treatment, the material provides good wear resistance, dimensional stability, and mechanical strength. It has excellent machinability in the annealed condition and can be readily turned, drilled, milled, and threaded.
Due to its excellent machining performance and moderate corrosion resistance, 416 stainless steel bars are widely used in automatic screw machine components, shafts, gears, valves, pumps, fasteners, bushings, fittings, and precision mechanical parts. It is especially suitable for high-volume production applications where machining efficiency and dimensional accuracy are important.
ASTM / JIS / EN Standards
| Standard System | Standard / Grade | Description |
| ASTM | ASTM A276 / A276M – UNS S41600 | Stainless Steel Bars and Shapes |
| ASTM | ASTM A582 / A582M – UNS S41600 | Free-Machining Stainless Steel Bars |
| UNS | S41600 | 416 Stainless Steel Grade |
| JIS | JIS G4303 SUS416 | Stainless Steel Bars |
| EN | EN 10088-3 1.4005 | X12CrS13 Stainless Steel |
| DIN | DIN 1.4005 | Equivalent European Material Designation |
Stainless Steel Bar Execution Standards
| Item | Specification |
| Product Type | Round Bar, Square Bar, Hexagonal Bar |
| Manufacturing Process | Hot Rolled, Cold Drawn, Peeled, Ground, Polished |
| Heat Treatment | Annealed, Hardened and Tempered |
| Annealing Temperature | Approximately 815–900°C |
| Hardening Temperature | Approximately 925–1010°C followed by oil or air cooling |
| Tempering Temperature | Approximately 200–650°C depending on required properties |
| Surface Condition | Black Surface, Bright Surface, Ground Surface, Polished Surface |
| Dimensional Tolerance | According to ASTM A276 / ASTM A582 requirements |
| Inspection | Chemical Analysis, Mechanical Testing, Hardness Testing, Dimensional Inspection |
| Supply Condition | Annealed, Heat Treated, Machined Condition |
Chemical Composition (%)
| Element | Composition Requirement |
| Carbon (C) | ≤ 0.15 |
| Silicon (Si) | ≤ 1.00 |
| Manganese (Mn) | ≤ 1.25 |
| Phosphorus (P) | ≤ 0.060 |
| Sulfur (S) | 0.15 – 0.35 |
| Chromium (Cr) | 12.00 – 14.00 |
| Nickel (Ni) | ≤ 0.60 |
| Molybdenum (Mo) | ≤ 0.60 |
| Iron (Fe) | Balance |
Mechanical Properties
Hardened and Tempered Condition (Typical)
| Property | Requirement |
| Tensile Strength | 650–850 MPa |
| Yield Strength (0.2% Offset) | ≥ 450 MPa |
| Elongation | ≥ 10% |
| Hardness | 25–40 HRC (Typical) |
| Condition | Hardened and Tempered |
Annealed Condition (Typical)
| Property | Requirement |
| Tensile Strength | Approximately 515 MPa |
| Hardness | ≤ 223 HB |
| Condition | Annealed |
| Industry | Applications |
| Automatic Machining Industry | Screw machine parts, precision components |
| Valve Industry | Valve bodies, valve stems, fittings |
| Pump Industry | Pump shafts, pump components |
| Mechanical Engineering | Shafts, gears, bushings, fasteners |
| Automotive Industry | Engine components, transmission parts |
| Electrical Industry | Motor shafts, precision hardware |
| Industrial Equipment | Machined fittings and structural components |
416 stainless steel is a free-machining martensitic chromium stainless steel grade designated as UNS S41600. It is specifically developed to provide excellent machinability while maintaining the strength, hardness, and corrosion resistance characteristics of martensitic stainless steels. With the addition of sulfur, 416 stainless steel offers significantly improved machining performance compared with conventional 410 stainless steel, making it one of the most widely used free-machining stainless steel grades.
The alloy contains chromium as the primary corrosion-resistant element, which forms a passive chromium oxide layer that provides resistance to atmospheric corrosion and mild chemical environments. The sulfur addition creates manganese sulfide inclusions within the microstructure, reducing cutting forces, improving chip breaking, and extending tool life during machining operations. However, the sulfur content slightly reduces corrosion resistance and toughness compared with non-free-machining grades.
416 stainless steel bars are normally supplied in annealed condition for machining and can be hardened through quenching and tempering processes to achieve higher strength and hardness. After heat treatment, the material provides good wear resistance, dimensional stability, and mechanical strength. It has excellent machinability in the annealed condition and can be readily turned, drilled, milled, and threaded.
Due to its excellent machining performance and moderate corrosion resistance, 416 stainless steel bars are widely used in automatic screw machine components, shafts, gears, valves, pumps, fasteners, bushings, fittings, and precision mechanical parts. It is especially suitable for high-volume production applications where machining efficiency and dimensional accuracy are important.
ASTM / JIS / EN Standards
| Standard System | Standard / Grade | Description |
| ASTM | ASTM A276 / A276M – UNS S41600 | Stainless Steel Bars and Shapes |
| ASTM | ASTM A582 / A582M – UNS S41600 | Free-Machining Stainless Steel Bars |
| UNS | S41600 | 416 Stainless Steel Grade |
| JIS | JIS G4303 SUS416 | Stainless Steel Bars |
| EN | EN 10088-3 1.4005 | X12CrS13 Stainless Steel |
| DIN | DIN 1.4005 | Equivalent European Material Designation |
Stainless Steel Bar Execution Standards
| Item | Specification |
| Product Type | Round Bar, Square Bar, Hexagonal Bar |
| Manufacturing Process | Hot Rolled, Cold Drawn, Peeled, Ground, Polished |
| Heat Treatment | Annealed, Hardened and Tempered |
| Annealing Temperature | Approximately 815–900°C |
| Hardening Temperature | Approximately 925–1010°C followed by oil or air cooling |
| Tempering Temperature | Approximately 200–650°C depending on required properties |
| Surface Condition | Black Surface, Bright Surface, Ground Surface, Polished Surface |
| Dimensional Tolerance | According to ASTM A276 / ASTM A582 requirements |
| Inspection | Chemical Analysis, Mechanical Testing, Hardness Testing, Dimensional Inspection |
| Supply Condition | Annealed, Heat Treated, Machined Condition |
Chemical Composition (%)
| Element | Composition Requirement |
| Carbon (C) | ≤ 0.15 |
| Silicon (Si) | ≤ 1.00 |
| Manganese (Mn) | ≤ 1.25 |
| Phosphorus (P) | ≤ 0.060 |
| Sulfur (S) | 0.15 – 0.35 |
| Chromium (Cr) | 12.00 – 14.00 |
| Nickel (Ni) | ≤ 0.60 |
| Molybdenum (Mo) | ≤ 0.60 |
| Iron (Fe) | Balance |
Mechanical Properties
Hardened and Tempered Condition (Typical)
| Property | Requirement |
| Tensile Strength | 650–850 MPa |
| Yield Strength (0.2% Offset) | ≥ 450 MPa |
| Elongation | ≥ 10% |
| Hardness | 25–40 HRC (Typical) |
| Condition | Hardened and Tempered |
Annealed Condition (Typical)
| Property | Requirement |
| Tensile Strength | Approximately 515 MPa |
| Hardness | ≤ 223 HB |
| Condition | Annealed |
| Industry | Applications |
| Automatic Machining Industry | Screw machine parts, precision components |
| Valve Industry | Valve bodies, valve stems, fittings |
| Pump Industry | Pump shafts, pump components |
| Mechanical Engineering | Shafts, gears, bushings, fasteners |
| Automotive Industry | Engine components, transmission parts |
| Electrical Industry | Motor shafts, precision hardware |
| Industrial Equipment | Machined fittings and structural components |
