UNS R30556 (Alloy 556) Fe-Cr-Ni-Co Alloy

Austenitic & General Stainless Steels

Overview Chemical Composition Mechanical Properties Physical Properties Other Properties

Property Overview

Density8.4g/cm³

Elastic Modulus210GPa

Tensile Strength780MPa

Yield Strength350MPa

Brinell HardnessUnknown

Maximum Service Temperature1100°C

Weight Calculator

Chemical Composition

0.050 to 0.15%

21 to 23%

19 to 22.5%

2.5 to 4.0%

0.5 to 2.0%

0.2 to 0.8%

0.1 to 0.3%

0 to 0.040%

0 to 0.015%

0 to 0.3%

0.1 to 0.5%

16 to 21%

2.0 to 3.5%

0 to 0.020%

0.0050 to 0.1%

0.3 to 1.3%

0.0010 to 0.1%

20.4 to 38.2%

Mechanical

Elastic (Young's, Tensile) Modulus

210 GPa

Elongation at Break

45 %

Fatigue Strength

320 MPa

Poisson's Ratio

0.28

Shear Modulus

81 GPa

Shear Strength

550 MPa

Tensile Strength: Ultimate (UTS)

780 MPa

Tensile Strength: Yield (Proof)

350 MPa

Physical

Density

8.4 g/cm 3

Thermal

Latent Heat of Fusion

300 J/g

Maximum Temperature: Corrosion

450 °C

Maximum Temperature: Mechanical

1100 °C

Melting Completion (Liquidus)

1420 °C

Melting Onset (Solidus)

1330 °C

Specific Heat Capacity

450 J/kg-K

Thermal Conductivity

11 W/m-K

Thermal Diffusivity

2.9 mm 2 /s

Thermal Expansion

15 µm/m-K

Thermal Shock Resistance

18 points

Electrical

Electrical Conductivity: Equal Volume

1.8 % IACS

Electrical Conductivity: Equal Weight (Specific)

1.9 % IACS

Calculated

PREN (Pitting Resistance)

Resilience: Ultimate (Unit Rupture Work)

290 MJ/m 3

Resilience: Unit (Modulus of Resilience)

290 kJ/m 3

Stiffness to Weight: Axial

14 points

Stiffness to Weight: Bending

23 points

Strength to Weight: Axial

26 points

Strength to Weight: Bending

22 points

Environmental

Base Metal Price

70 % relative

Embodied Carbon

8.7 kg CO 2 /kg material

Embodied Energy

130 MJ/kg

Embodied Energy

130 MJ/kg 55 x 10 3 BTU/lb

Embodied Water

300 L/kg

Embodied Water

300 L/kg 36 gal/lb

Registered Designations & Aliases

Alloy 556R30556UNS R30556 (Alloy 556) Fe-Cr-Ni-Co Alloy

Standards

ASTM B435 ASTM B435: Standard Specification for UNS N06002, UNS N06230, UNS N12160, and UNS R30556 Plate, Sheet, and Strip

ASTM B435 ASTM B435: Standard Specification for UNS N06002, UNS N06230, UNS N12160, and UNS R30556 Plate, Sheet, and Strip ASTM B572: Standard Specification for UNS N06002, UNS N06230, UNS N12160, and UNS R30556 Rod ASTM B619: Standard Specification for Welded Nickel and Nickel-Cobalt Alloy Pipe ASTM B626: Standard Specification for Welded Nickel and Nickel-Cobalt Alloy Tube ASTM B622: Standard Specification for Seamless Nickel and Nickel-Cobalt Alloy Pipe and Tube Welding Metallurgy and Weldability of Stainless Steels, John C. Lippold and Damian J. Kotecki, 2005

ASTM B572 ASTM B572: Standard Specification for UNS N06002, UNS N06230, UNS N12160, and UNS R30556 Rod

ASTM B619 ASTM B619: Standard Specification for Welded Nickel and Nickel-Cobalt Alloy Pipe

ASTM B622 ASTM B622: Standard Specification for Seamless Nickel and Nickel-Cobalt Alloy Pipe and Tube

ASTM B626 ASTM B626: Standard Specification for Welded Nickel and Nickel-Cobalt Alloy Tube