Engineering Alloy Steels Official identity plus sourced composition

Material / Grade

1.5415

16Mo3

1.5415 / 16Mo3 is a DIN/W.Nr dossier with source-traced identity and explicitly labeled engineering guidance.

Hardness potential39 / 100Comparison index

Toughness66 / 100Comparison index

Impact resistance66 / 100Comparison index

Bending resistance68 / 100Comparison index

Abrasive wear39 / 100Comparison index

Steel Overview

Complete introduction and metallurgical analysis

1.5415 / 16Mo3 belongs to Engineering Alloy Steels and selection centres on a controlled balance of hardenability, strength, toughness and manufacturing response.

1.5415 / 16Mo3 is a DIN/W.Nr dossier with source-traced identity and explicitly labeled engineering guidance.

The expected microstructure is ferrite-pearlite, bainite or tempered martensite according to chemistry, section size and delivery condition; delivery condition, section size, melt quality and processing history can change that state.

Comparison indices are hardness 39/100, toughness 66/100, impact 66/100, wear 39/100 and bending 68/100. These are internal indices, not standard test results.

The screening temperature range is 100–300 °C; strength or hardness loss, oxidation, exposure time and creep must be assessed separately.

A representative process route is normalising, annealing or quenching and tempering as required by the applicable grade and product standard. Obtain actual temperatures, times and cooling media from the grade and product data sheet.

Manufacturing indices are weldability 53/100, machinability 70/100, corrosion resistance 20/100 and fatigue resistance 57/100; use them for screening only.

The principal risk is incorrect property assumptions when section size, heat treatment and delivery condition are not matched to the certified product. Evaluate geometry, surface condition, environment and the governing failure mechanism together.

A similar name or calculated relationship is not proof of interchangeability; match chemistry, specification, condition, heat treatment and MTC.

Engineering conclusion: 1.5415 / 16Mo3 is a rational candidate when adaptable mechanical performance across a wide range of engineering components matches the real load, environment and certified product condition.

Recorded standards:DIN 17155EN 10028-2: 2009 Flat products made of steels for pressure purposes. Non-alloy and alloy steels with specified elevated temperature propertiesEN 10222-2: 2000 Steel forgings for pressure purposes. Ferritic and martensitic steels with specified elevated temperature propertiesEN 10216-2: 2014 Seamless steel tubes for pressure purposes. Technical delivery conditions. Non-alloy and alloy steel tubes with specified elevated temperature propertiesEN 10217-5: 2002 Welded steel tubes for pressure purposes. Submerged arc welded non-alloy and alloy steel tubes with specified elevated temperature propertiesEN 10217-2: 2002 Welded steel tubes for pressure purposes. Electric welded non-alloy and alloy steel tubes with specified elevated temperature propertiesEN 10253-2: 2007 Butt-welding pipe fittings. Non alloy and ferritic alloy steels with specific inspection requirementsEN 10273: 2007 Hot rolled weldable steel bars for pressure purposes with specified elevated temperature propertiesDIN / W.Nr cross-reference

International Equivalents

International equivalents and designations

A close counterpart is not automatically interchangeable. Confirm chemistry, product standard, delivery condition, dimensions and heat treatment.

EN / W.NrOfficial designation for the same grade

16Mo3 / 1.5415

A registered identity within the same grade record.

DIN / W.NrOfficial designation for the same grade

16Mo3

A registered identity within the same grade record.

W.NrOfficial designation for the same grade

1.5415

A registered identity within the same grade record.

DIN / W.NrOfficial designation for the same grade

15Mo3

A registered identity within the same grade record.

Chemical Composition

Chemical composition and the role of each element

The principal recorded elements are C≈0.16%, Si≈0.175%, Mn≈0.65%, Ni≈0.15%, P≈0.0125%, S≈0.005%, Cr≈0.15%, Mo≈0.3%, N≈0.006%, Cu≈0.15%. Mid-range values support engineering interpretation and do not replace purchase limits. Composition is shown for screening and traceability. The current purchase standard and the heat-specific MTC remain authoritative.

Element	Weight-percent range	Metallurgical role and effect
C	0.12–0.2 %	Carbon raises hardness, strength and carbide potential; excessive carbon can reduce toughness and weldability.
Si	0–0.35 %	Silicon supports deoxidation and solid-solution strength and can influence tempering or oxidation response.
Mn	0.4–0.9 %	Manganese contributes to hardenability and sulfur control; its final effect depends on amount and processing.
Ni	0–0.3 %	Nickel generally improves toughness and through-section response and stabilises austenite in stainless systems.
P	0–0.025 %	Phosphorus is normally restricted because higher content can promote embrittlement and reduce toughness.
S	0–0.01 %	Sulfur may improve chip control in free-cutting grades but can reduce transverse toughness and weldability.
Cr	0–0.3 %	Chromium promotes hardenability and carbide formation and, at sufficient levels, corrosion or oxidation resistance.
Mo	0.25–0.35 %	Molybdenum improves hardenability and temper resistance and can support hot strength or pitting resistance.
N	0–0.012 %	Nitrogen strengthens austenitic stainless steel and contributes strongly to pitting resistance and phase balance.
Cu	0–0.3 %	Copper can improve atmospheric corrosion resistance or precipitation response in selected alloy systems.

16Mo3 — structured limits from the cited SteelNumber page Sourced with conditions

Engineering Behaviour

Engineering behaviour and selection response

Hardness potential39 / 100

Relative screening index only; obtain condition-specific hardness data. Internal comparison index: 39/100.

Engineering analysis

Toughness66 / 100

Toughness has an internal index of 66/100 (high). Actual performance requires a documented product condition, heat treatment and test context.

Engineering analysis

Impact resistance66 / 100

Impact resistance has an internal index of 66/100 (high). Actual performance requires a documented product condition, heat treatment and test context.

Engineering analysis

Bending resistance68 / 100

Bending resistance has an internal index of 68/100 (high). Actual performance requires a documented product condition, heat treatment and test context.

Engineering analysis

Abrasive wear39 / 100

Wear depends on hardness, microstructure and mechanism. Internal comparison index: 39/100.

Engineering analysis

Corrosion resistance20 / 100

Not stainless; surface protection is generally required in moist/corrosive service. Internal comparison index: 20/100.

Engineering analysis

Weldability53 / 100

Weldability has an internal index of 53/100 (moderate). Actual performance requires a documented product condition, heat treatment and test context.

Engineering analysis

Machinability70 / 100

Machinability has an internal index of 70/100 (high). Actual performance requires a documented product condition, heat treatment and test context.

Engineering analysis

High-temperature strength25 / 100

No sourced continuous maximum is claimed; the family window is screening guidance. Internal comparison index: 25/100.

Engineering analysis

Creep resistance13 / 100

Creep resistance has an internal index of 13/100 (very low). Actual performance requires a documented product condition, heat treatment and test context.

Engineering analysis

Fatigue resistance57 / 100

Fatigue resistance has an internal index of 57/100 (moderate). Actual performance requires a documented product condition, heat treatment and test context.

Engineering analysis

Numerical scores are internal comparison indices. They are not standard test results, allowable design stresses or a manufacturer guarantee. Data Method

Hardness & Hardenability

Hardness and hardenability

Relative screening index only; obtain condition-specific hardness data. Internal screening index: 39/100 (low).

39/100

low

Comparison index

Governing factors

Chemistry and section size
Austenitising and quench severity
Tempering temperature and time
Test method and surface preparation

Data limits

Final acceptance requires the current standard, product form, dimensions, delivery condition and heat-specific MTC.

Impact & Toughness

Toughness, impact and fracture behaviour

Impact resistance is indexed at 66/100 and toughness at 66/100. These are not Charpy or Izod energy values; temperature, orientation, geometry and actual microstructure govern component behaviour.

66/100highComparison index

Microstructure, hardness and grain size influence impact tolerance.
Sharp radii, notches and surface defects reduce fracture resistance.
Test temperature, specimen direction and section must be identified.
For critical parts, accept impact energy only from a documented test of the same condition.

Temperature & Creep

Service temperature, thermal stability and creep

No sourced continuous maximum is claimed; the family window is screening guidance. 100–300 °C is a screening range or sourced limit according to its evidence label. Check strength loss, oxidation, creep, exposure time and environment.

Continuous service

100–300 °CEngineering guidance

Review the limit against strength or hardness loss and exposure time.

Intermittent service

Do not assign an intermittent limit without product-specific source data.

Tempering and phase stability

Working and coating temperatures must remain compatible with the tempering condition and required microstructure.

Oxidation and environment

Oxidation or corrosion may become limiting before the strength criterion.

Relative creep resistance13/100Comparison index

The relative creep index is 13/100 (very low). It is not an allowable creep stress or rupture-life value.

Do not select this grade for long-term static high-temperature loading from the internal index alone.

Wear & Surface Behaviour

Wear resistance and surface behaviour

Abrasive wear

Wear depends on hardness, microstructure and mechanism. The abrasive-wear index is 39/100; final hardness, carbides, microstructure, contact mode and lubrication govern actual resistance.

Comparison index

Adhesive wear

Assess adhesive wear with the counterface material, lubrication, roughness, pressure and temperature.

Engineering analysis

Surface improvement

Evaluate surface treatment or coating only after confirming compatibility with chemistry, substrate and process temperature.

Engineering guidance

Mechanical & Physical Properties

Mechanical and physical properties

No complete sourced numerical mechanical set is stored for this condition; labelled comparison indices are shown instead of invented test values.

Comparative property	Internal index	Information type
Hardness potential	39 / 100	Comparison index
Toughness	66 / 100	Comparison index
Impact resistance	66 / 100	Comparison index
Bending resistance	68 / 100	Comparison index
Abrasive wear	39 / 100	Comparison index
Corrosion resistance	20 / 100	Comparison index
Weldability	53 / 100	Comparison index
Machinability	70 / 100	Comparison index
High-temperature strength	25 / 100	Comparison index
Creep resistance	13 / 100	Comparison index
Fatigue resistance	57 / 100	Comparison index

Physical properties

Density, elastic modulus, expansion and conductivity depend on family, temperature and product condition. Use grade- and product-specific values for precise calculations.

Obtain density and expansion data from the product data sheet for dimensional calculations.
Elastic modulus and conductivity vary with temperature.

Engineering analysis

Heat Treatment

Heat-treatment stages and process controls

The representative family route is normalising, annealing or quenching and tempering as required by the applicable grade and product standard. Numerical temperatures are shown only when supported by the record.

Annealing / stress relief

Engineering guidance

Assess the supply condition, residual stress, section size and prior machining before selecting time and temperature.

Cooling: Grade- and process-specific cooling

Preheating and austenitising

Engineering guidance

Set preheat steps and austenitising parameters from the grade/product data sheet and actual section size.

Cooling: Grade- and process-specific cooling

Quenching / controlled cooling

Engineering guidance

Choose the quench medium and cooling severity against hardenability, geometry, distortion and crack risk.

Cooling: Grade- and process-specific cooling

Tempering / property adjustment

Engineering guidance

Set tempering or ageing to the required hardness, toughness and service-temperature balance.

Cooling: Grade- and process-specific cooling

Tempering / property adjustment

Engineering guidance

Set tempering or ageing to the required hardness, toughness and service-temperature balance.

Cooling: Grade- and process-specific cooling

Process control: Review delivery condition, actual section, equipment capability, crack and distortion risk and target hardness before approving the cycle.

Engineering Charts

Hardness, toughness, impact, temperature and process charts

Chemistry data retain their evidence label; 0–100 charts are internal indices and stages without temperature are process sequences.

Multi-axis engineering profile

Comparison index

Chemical composition

Derived from source data

Hardness–toughness balance

Comparison index

Toughness, impact and fatigue

Comparison index

Wear and surface response

Comparison index

Mechanical properties or comparison indices

Comparison index

Service temperature

Engineering guidance

Heat treatment

Engineering guidance

Related-grade similarity

Comparison index

All comparison indices

Comparison index

Failure Modes & Selection

Potential failure modes and selection guidance

Potential failure mechanisms

incorrect property assumptions when section size, heat treatment and delivery condition are not matched to the certified product.
Fatigue initiation from surface defects, section transitions or stress concentration.
Property loss after unsuitable heat treatment, cooling or finishing.
Corrosion, oxidation or environmental attack when protection is inadequate.

Selection and design notes

Match designation, material number, product standard and supply form before purchase.
Compare the governing failure mechanism with hardness 39, toughness 66, impact 66 and wear 39 indices out of 100.
Use mechanical values only within their cited condition, dimensions and test temperature.
Confirm the heat-treatment route and target hardness with the processor before final machining.
Review the heat number, MTC and required test results before release.

Derived calculations

Carbon equivalent CE(IIW)0.302 Calculated

Calculated from recorded inputs; apply only within the stated formula scope and limitations.

Weld-cracking composition parameter Pcm0.175 Calculated

Calculated from recorded inputs; apply only within the stated formula scope and limitations.

Advantages & Limitations

Advantages, limitations and unsuitable applications

Advantages

adaptable mechanical performance across a wide range of engineering components.
A clearly labelled engineering profile supports comparison with related grades.
Grade identity, chemistry, counterparts and references remain traceable in one dossier.

Limitations and weaknesses

incorrect property assumptions when section size, heat treatment and delivery condition are not matched to the certified product.
A 0–100 index cannot be converted into design stress, impact energy or creep life.
Hardness and toughness depend on section, delivery condition and actual processing.
Do not approve a substitute before checking the product standard and heat-specific MTC.

Cases requiring caution or an alternative material

Critical design without condition- and section-specific test dataDirect substitution based only on name or similarity scoreLong-term creep service without sourced time–stress–temperature dataincorrect property assumptions when section size, heat treatment and delivery condition are not matched to the certified product

Applications & Processing

Industrial applications and processing

Typical applications

Shafts, axles and rotating machine components
High-strength fasteners and mechanical connections
General engineered and machine components
shafts, pins and machine components
gears and transmission parts where the grade is qualified
forgings and heat-treated sections
general high-duty engineering components

Manufacture, welding and surface engineering

Weldability has an internal index of 53/100 (moderate). Actual performance requires a documented product condition, heat treatment and test context.

Forming and forging depend on steel family, delivery condition and the grade-specific qualified temperature range.

Select nitriding, induction hardening or coating against chemistry, substrate hardness and application.
Keep coating-deposition temperature compatible with the tempering condition and substrate.
Control hydrogen embrittlement, residual stress and distortion in high-strength components.

Engineering Conclusion

Engineering conclusion and selection recommendation

1.5415 / 16Mo3 is worth evaluating when the principal need is adaptable mechanical performance across a wide range of engineering components. Internal indices of hardness 39/100, toughness 66/100, impact 66/100 and wear 39/100 must be aligned with the real failure mechanism. The leading risk is incorrect property assumptions when section size, heat treatment and delivery condition are not matched to the certified product. Final approval requires the current standard, product form, dimensions, delivery condition, heat treatment and heat-specific MTC.

Engineering analysis

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Frequently Asked Questions

Frequently asked questions

What is 1.5415 / 16Mo3 steel?

1.5415 / 16Mo3 is a DIN/W.Nr dossier with source-traced identity and explicitly labeled engineering guidance.

What are the main applications of 1.5415 / 16Mo3?

Application contexts include Shafts, axles and rotating machine components, High-strength fasteners and mechanical connections, General engineered and machine components and shafts, pins and machine components, subject to the product standard and actual condition.

How hard can 1.5415 / 16Mo3 be?

Relative screening index only; obtain condition-specific hardness data. Internal screening index: 39/100 (low).

Is 1.5415 / 16Mo3 suitable for impact loading?

Impact resistance is indexed at 66/100 and toughness at 66/100. These are not Charpy or Izod energy values; temperature, orientation, geometry and actual microstructure govern component behaviour.

What is the service-temperature limit of 1.5415 / 16Mo3?

Can 1.5415 / 16Mo3 be replaced by a close grade?

Approve substitution only after matching chemistry, specification, product form, condition, heat treatment and MTC.

Steel Comparison

Engineering steel comparison

Compare this grade with any other dossier. Scores from 0 to 100 are internal screening indices, not laboratory values or allowable design stresses.

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Current grade1.5415 / 16Mo3Engineering Alloy Steels

Selected grade1.0416 / C18DEngineering Alloy Steels

Current-grade chemistry

Second-grade chemistry

Current-grade heat treatment

Second-grade heat treatment

Current-grade applications

Limitations

Second-grade applications

Limitations

Select a second grade to update the comparison.

Sources & Evidence

Sources, methodology and evidence

Sources support grade identity, recorded values or the engineering method. General guidance does not replace product-specific certification.

Grade-specific sources

steelnumber.comSource Inventory · Tier B

Reference supporting grade identity or recorded values; interpret it within the cited product and condition context. Role: source inventory.

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steelnumber.comDesignation Context · Tier B

Reference supporting grade identity or recorded values; interpret it within the cited product and condition context. Role: designation context.

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steelnumber.comDesignation cross-reference · Tier B

Reference supporting grade identity or recorded values; interpret it within the cited product and condition context. Role: identity crosswalk.

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steelnumber.comDesignation cross-reference · Tier B

Reference supporting grade identity or recorded values; interpret it within the cited product and condition context. Role: identity crosswalk.

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steelnumber.comComposition Source · Tier B

Reference supporting grade identity or recorded values; interpret it within the cited product and condition context. Role: composition source.

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stahldaten.deOfficial material-number register · Tier A

Reference supporting grade identity or recorded values; interpret it within the cited product and condition context. Role: official material number register.

View source