Toggle Nav
    Menu
    Account
    Cart
    THE POWER OF STEEL GRADE VARIETY!
    Steel
    Tool Steel
    420FM
    Steel Grades
    Product Overview
    Icon of arrows split up and left Alternatives
    Technical Datasheet

    420FM Tool Steel - DIN 1.2085 - X33CrS16 - Data Sheet

    420FM is a martensitic, pre-hardened, corrosion resistant plastic mold steel, which is magnetizable with good machinability due to the addition of Sulphur.

    On this Page

    1. Select Your Steel Length
    2. Standard values
    3. General Information

    Purchase 420FM Tool Steel Online

    Select Your Steel Length below

    Imperial and Metric Steel Sizes for Sale

    Imperial Steel Size

    steel type image
    $mart Flat Stock [$mart]

    Standardized Precision Blanks

    Metric Steel Size

    steel type image
    Precision Ground Flat Stock Metric, oversize [GFSM O/S]

     

    steel type image
    $mart Flat Stock Metric [$martM]

    Standardized Precision Blanks Metric

    You can easily reach out to one of our order consultants to find the exact steel products you need.
    Let's Talk
    PERFECTION!
    Watch the Making of Video
    Icon of an atom

    420FM Tool Steel Standard values

    Working hardness: approx. 33 HRC (delivery condition) - 48 HRC
    Delivery condition: max. 330HB

    Chemical composition in %

    C

    0.280000

    0.28
    –

    0.380000

    0.38
    Si

    0.000000

    0
    –

    1.000000

    1
    Mn

    0.000000

    0
    –

    1.400000

    1.4
    P

    0.000000

    0
    –

    0.030000

    0.03
    S

    0.050000

    0.05
    –

    0.100000

    0.1
    Cr

    15.000000

    15
    –

    17.000000

    17
    Ni

    0.000000

    0
    –

    1.000000

    1

    420FM Tool Steel Technical Data

    Icon of a spanner

    420FM Tool Steel Technical Properties

    Pre-hardened, corrosion-resistant plastic mold steel. Magnetisable with good machinability. Resistant to aggressive plastics and humid conditions. Further heat treatment is not intended.

    Icon of a check mark

    420FM Tool Steel Applications

    mechanical engineering, apparatus engineering, plastic processing, injection tools, base plates, assembling parts, molding frames, plastic molds, extrusion tools, valves, steam valves, water valves, fittings parts, pump construction, pump rods, compressor construction, compressor parts, surgical instruments

    Chemical designation: Working hardness: approx. 33 HRC (delivery condition) - 48 HRC
    Delivery condition: max. 330HB

    C

    0.280000

    0.28
    –

    0.380000

    0.38
    Si

    0.000000

    0
    –

    1.000000

    1
    Mn

    0.000000

    0
    –

    1.400000

    1.4
    P

    0.000000

    0
    –

    0.030000

    0.03
    S

    0.050000

    0.05
    –

    0.100000

    0.1
    Cr

    15.000000

    15
    –

    17.000000

    17
    Ni

    0.000000

    0
    –

    1.000000

    1

    Pre-hardened, corrosion-resistant plastic mold steel. Magnetisable with good machinability. Resistant to aggressive plastics and humid conditions. Further heat treatment is not intended.

    mechanical engineering, apparatus engineering, plastic processing, injection tools, base plates, assembling parts, molding frames, plastic molds, extrusion tools, valves, steam valves, water valves, fittings parts, pump construction, pump rods, compressor construction, compressor parts, surgical instruments

    420FM General Information

    As a martensitic steel 420FM is magnetizable, has good corrosion resistance even in humid conditions and when processing aggressive plastics. 420FM corrosion resistant tool steel comes in a pre-hardened condition, has good machinability and high strength without the need for a heat treatment. This steel grade can be used when good machinability with simultaneous corrosion resistance is a priority. 420FM has a good ductility and toughness as well as good dimensional stability.

     

    Applications

    Applications for this corrosion resistant tool steel include: Blow molds, packaging, electronic industry, measuring gauges, medical and optical instruments. Due to the better corrosion resistance, the maintenance requirement for molds is reduced.

     

    Heat treatment

    Generally, as this steel grade is delivered in the pre-hardened condition, further heat treatment is not required. The following procedures can be applied if a higher hardness is necessary.

    Annealing

    Heat the 420FM work pieces uniformly to 1562-1616°F (850-880°C) and hold them for 2 to 5 hours, then slowly cool in the furnace.

    Stress relieving

    To eliminate surface and/or residual stresses from machining, heat the work piece to 842°F (450°C), then cool down slowly in the furnace. At a higher temperature this steel grade tends to scale.

    Hardening

    Heat 420FM stainless steel uniformly through to 1832-1886°F (1000-1030°C) and hold it at this temperature for 30 minutes. Then quench the work pieces in oil.

    Quenching media

    • Oil
    • Compressed gas (N2)

    Tempering

    Heat 420FM slowly to a tempering temperature of 392-572°F (200-300°C) after hardening, hold for 2 hours per 25/32 inch (20 mm) thickness. Double tempering is recommended. Slowly cool in the furnace.

    For our tempering diagram, please click here

     

    Machinability

    With the addition of sulphur this steel grade has a good machinability.

    Forging

    Uniformly heat the parts to a temperature range of 1922-1562°F (1050-850°C), when finished forging cool the work pieces slowly down.

     

    Disclaimer

    The data shown here has been compiled with the greatest diligence and is regularly updated with regard to the correctness and completeness of its content. The content is indicative only and should not be taken as a warranty of specific properties of the product described or a warranty of suitability for a particular purpose. All information presented is given in good faith and no liability will be accepted for actions taken by third parties in reliance on this information. ABRAMS Industries reserves the right to change or amend the information given here in full or parts without prior notice.