305 Stainless Steel

Description:

Type 305 Stainless Steel is an austenitic chromium nickel stainless steel that can be cold worked and deep drawn more readably than Type 302 and Type 304 due to an increased nickel content that decreases the work hardening rate of the material. It is nonmagnetic and cannot be hardened by thermal treatment.

Product Forms:

Sheet, Strip

Specifications:

ASTM A240, AMS 5514

Typical Applications:

Deep drawn or spun components, eyelets, electronic enclosure applications

Chemical Composition: (ASTM A240)

ElementType
Carbon 0.12 max.
Manganese 2.00max.
Sulfur 0.030 max.
Phosphorus 0.045 max.
Silicon 0.75 max.
Chromium 17.0 – 19.0
Nickel 10.5 – 13.0

Mechanical Properties: (ASTM A240)

TypeYield Strength 0.2% offset (KSI)Tensile Strength (KSI)% Elongation (2" Gauge length)Hardness Rockwell
305 Ann 30 min. 70 min. 40 min. HRB 88 max.

Physical Properties:

Density (lb./ in^2) @ RT   0.29
Modulus of Elasticity in Tension (psi x 10^6)   28.0
Specific Heat (BTU/o F/lb.) 32 to 212 oF 0.12
Thermal Conductivity (BTU/hr/ft^2/ft) 212oF 9.4
  932oF 12.4
Mean Coefficient of Thermal Expansion (in. x 10^-6 per o F) 32 to 212oF 9.6
  32 to 600oF 9.9
  32 to 1,000oF 10.2
  32 to 1,200oF 10.4
Electrical Resistivity (micro ohms - cm) at 70oF 28.4
Melting Point Range (oF)   2550 - 3650
Oxidation Resistance - Continuous Service(oF)   1650
Oxidation Resistance - Intermittent Service(oF)   1500

Processing:

Type 305 is not hardenable by heat treatment. Anneal at 1850 - 2050°F (1010 - 1121°C), then water quench or rapid air cool.

Forming:

Type 305 Stainless Steel is more readily formed, deep drawn and spun than Types 302 and 304 due to its lower work hardening rate.

Welding:

This particular alloy is generally considered to have comparable weldability to Types 304 and 304L, but autogenous arc welding sometimes causes hot cracking. Annealing after welding will be needed to offset any chromium carbide precipitation which might occur. When a filler is needed, AWS E/ER 308 is most often specified.

Corrosion:

Type 305 is similar to Type 304 with respect to corrosion resistance. It offers good protection from a wide variety of solutions used in the chemical, textile, petroleum, dairy and food industries.