1.4021 Stainless Steel

1.4021 Stainless Steel
Hardox 400 Steel
1.2085 steel

OTAI SPECIAL STEEL is 1.4021 Stainless Steel stockholders and suppliers from china. More than 25 years of experience in 1.4021 Stainless steel round bar, flat bar, and plate supply.

Martensitic stainless steel is intended for thermal improvement, showing high mechanical properties – strength, ductility, and machinability, while maintaining sufficient corrosion resistance.

1.4021 steel is a suitable grade for work in steam environments, in low concentrations of inorganic acids, diluents, clean water, and steam at a suitably treated surface. It can also be classified as a heat-resistant grade up to 825 degrees. Shows resistance to gases containing sulfur compounds and hot steam. Stable and appropriately high mechanical properties are maintained in the operating temperature range of 475 – 500. Above the early-mentioned temperature, the creep limit is negligible, only the time resistance is relatively high.

The grade is used for the production of bolts at elevated temperatures, turbine blades, knives, decoration, surgical instruments, bushings, valve seats, scrapers, blades, ramparts, checks, springs, machine parts, molds for casting under pressure, and the pins exposed to light loads in the automotive, petrochemical, industrial hydraulics and energy industries.

1.4021 Steel properties as below:

Form of Supply

1.4021 steel, we can supply the round bar, flat bar, plate, hexagonal steel bar, and steel square block. Round bars can be sawn to your required lengths as one-offs or multiple-cut pieces. Rectangular pieces can be sawn from flat bars or plates to your specific sizes. Ground tool steel bar can be supplied, providing a quality precision finished bar to tight tolerances.

Chemical composition

C(％) 0.16～0.25 Si(％) ≤1.00 Mn(％) ≤1.50
S(％) ≤0.03  Cr(％) 12.00～1400 P(％) ≤0.04

Properties for bars

  • Annealed softened delivery condition +A
    • Tensile strength for peeled bars, Rm: <760 MPa
    • Hardness for peeled bars, HB: <230
    • Tensile strength for peeled bars, Rm: <910 MPa
    • The hardness for drawn bars, HB: <290
  • Heat-treated condition +QT700
    • Properties for peeled bars
      • Tensile strength, Rm: 700 – 850 MPa
      • The yield point, Rp0,2: >500 MPa
      • Elongation, A:> 13%
      • Impact resistance, KV: > 25J
    • Properties for drawn bars
      • Tensile strength, Rm: 700 – 1000 MPa
      • The yield point, Rp0,2: >500 MPa
      • Elongation, A:> 8%
      • Impact resistance, KV: > 25J
  • Heat-treated condition +QT800
    • Tensile strength, Rm: 800 – 950 MPa
    • The yield point, Rp0,2: >600 MPa
    • Elongation, A:> 12%
    • Impact resistance, KV: > 20J
  • Thermal capacity, cp = 460 J * kg-1 * K-1
  • Modulus of elasticity, E = 215 GPa
  • Thermal conductivity, λ = 30 W * m-1 * K-1
  • Specific resistance, Ω: 0.60 mkOhm * m
  • Linear expansion coefficient, α: 10.5 * 10-6 K-1

 

Mechanical properties for sheets

  • Annealed delivery condition +A
    • Tensile strength, Rm: <700 MPa
    • Elongation, A:> 15%
    • Hardness, HB/HV: <225
    • Hardness, HRB: <95
  • Heat-treated condition +QT650
    • Tensile strength, Rm: 650 – 850 MPa
    • The yield point, Rp0,2: >450 MPa
    • Elongation, A:> 12%
  • Heat-treated condition +QT750
    • Tensile strength, Rm: 750 – 950 MPa
    • The yield point, Rp0,2: >550 MPa
    • Elongation, A:> 10%
  • Hardness in HRC improved condition: 44-50
  • Hardness in HV improved condition: 440 – 530

Heat and plastic treatment of 1.4021

  • Annealing at a temperature of 745 – 825 ℃ with cooling in air
  • Delivery condition +QT650 – Hardening in 950 – 1010℃ with cooling in oil or air, tempering at 700 – 780℃
  • Delivery condition +QT700 – Hardening in 950 – 1050℃ with cooling in oil or air, tempering at 650 – 750℃
  • Delivery condition +QT750 – Hardening in 950 – 1010℃ with cooling in oil or air, tempering at 620 – 700℃
  • Delivery condition +QT800 – Hardening in 950 – 1050℃ with cooling in oil or air, tempering at 600 – 700℃
  • Rolling and forging at a temperature of 1100 – 800 ℃

Quality Assured Supply

1.4021 steel is supplied in accordance with our ISO 9001: 2008 registration.

Contact our experienced sales team to help you with your 1.4021 steel questions and inquiry by Email or Telphone. The questions will be replied in 24 hours.

Email: jack@otaisteel.com

Tel: +86-769-33232622

Fax: +86-769-88705839