317(18cr-12ni-3.5 Mo) stainless steel has better pitting corrosion resistance than 316 steel. 317 stainless steel used for printing and dyeing equipment materials.
Stainless steels are known as high-alloy steels. They consist about 4-30% of chromium. They are classified into martensitic, austenitic, and ferritic steels based on their crystalline structure.
Chemical Composition
Carbon 0.08 max
Chromium 18 - 20
Iron Balance
Manganese 2 max
Molybdenum 3 - 4
Nickel 11 - 15
Phosphorus 0.045 max
Silicon 1 max
Sulphur 0.03 max
| Machanical Properties | Metric | Imperial |
Tensile strength | 620 MPa | 89900 psi |
Yield strength | 275 MPa | 39900 psi |
Elastic modulus | 193 GPa | 27993 ksi |
Poisson's ratio | 0.27-0.30 | 0.27-0.30 |
Elongation at break (in 50 mm) | 45% | 45% |
Hardness, Rockwell B | 85 | 85 |
Physical Properties
Density (lb / cu. in.)0.29
Specific Gravity7.9
Specific Heat (Btu/lb/Deg F - [32-212 Deg F])0.12
Electrical Resistivity (microhm-cm (at 68 Deg F))444
Melting Point (Deg F)2550
Modulus of Elasticity Tension28
Machinability
Grade 317 stainless steel is tougher than 304 stainless steel. It is recommended to use chip breakers. Hardenability of this alloy will be reduced if constant feeds and low speeds are used.
Grade 317 stainless steel can be welded using fusion and resistance methods. Oxyacetylene welding method is not preferred for this alloy. AWS E/ER317 or 317L filler metal can be used to obtain good result.
Grade 317 stainless steel can be hot worked using all common hot working procedures. It is heated at 1149-1260°C (2100-2300°F). It should not be heated below 927°C (1700°F). Post-work annealing can be done to retain the corrosion resistance property.
Cold Working
Stamping, shearing, drawing, and heading can be done successfully. Post-work annealing is performed in order to reduce internal stress.
Grade 317 stainless steel is annealed at 1010-1121°C (1850-2050°F) followed by cooling.
Grade 317 stainless steel does not react to heat treatment. It can be hardened by cold working.
Grade 317 stainless steel is used in the following applications:
Pulping paper
Textile
Chemical equipment
