AISI 431 / W.Nr. 1.4057 ESR stainless steel round bar for glass moulds

AISI 431 / W.Nr. 1.4057 ESR stainless steel round bar for glass moulds

Designations

Description

EN 1.4057 is a hardenable stainless steel containing 16 % chrome and 2 % nickel. In the hardened and tempered condition

it features:

* good corrosion resistance

* good wear resistance

* good polishing ability

* Good oxidation resistance

Chemical compositon ( in weight % )

Test

SEP 1921 C/c, D/ d, E/e or meet customers' request

Physical properties ( average values ) at ambient temperature

Modulus of elasticity [103 x N/mm2]: 216

Density [g/cm3]: 7.70

Thermal conductivity [W/m.K]: 25.0

Electric resistivity [Ohm mm2/m]: 0.70

Specific heat capacity[J/g.K]: 0.46

Modulus of Elasticity [103 N/mm2]

Coefficient of Linear Thermal Expansion 10-6 oC-1

Soft Annealing

Heat to 660-750oC, cool slowly in furnace.

This will produce a maximum Brinell hardness of 295.

Hardening

Harden from a temperature of 980-1030oC followed by oil or air quenching.

Hardness after quenching is about 47 HRC.

Tempering

Tempering temperature: For Q T 800: 750-800oC. For Q T 900: 600-650oC.

Forging

Hot forming temperature: 1100-800oC, slow cooling.

Machinability

In the fully annealed condition, 431 will gall and build up on the tools.

Good surface finishes are not easily obtained.

Corrosion Resistance

431 is superior to all other martensitic grades in terms of corrosion resistance.

Will resist dilute acids and alkalis, neutral and basic salts, food acids, fresh water and atmosphere.

Welding

Most electric welding procedures have proven successful with 431 stainless. Filler metal should be AWS E/ER410.

To avoid cracking, pre-heat the workpiece to 204-316oC.

After air cooling, treat at 649oC to reattain maximum properties.

Embittlemnt: It must be in mind that the temperature range between 425 and 525oC must be avoided owing to embritllement

at 475oC.

Cold working

This alloy is easily drawn, spun, headed, sheared and bent compared with other stainless steels.

We are looking forward to your enquiries.

Contact:LIU

Email: sales@ahoneststeel.com

Cell:0086 189 1527 2882