Chemical composition
Nominal: elements given only as a maximum are counted at the cap; the balance takes the remainder.
| Element | Name | Content % | |
|---|---|---|---|
| Main elements1 element | |||
| Fe | Iron | Bal. | |
| Element | Name | Content % | |
|---|---|---|---|
| Minor & residual10 elements | |||
| C | Carbon | ≤ 0.006% | |
| Si | Silicon | ≤ 0.08% | |
| Mn | Manganese | ≤ 0.25% | |
| P | Phosphorus | ≤ 0.012% | |
| S | Sulphur | ≤ 0.006% | |
| Al | Aluminium | ≤ 0.8% | |
| Ti | Titanium | ≤ 0.005% | |
| Cr | Chromium | ≤ 0.03% | |
| Ni | Nickel | ≤ 0.02% | |
| Cu | Copper | ≤ 0.02% | |
Magnetic properties
Guaranteed values required by the standard, by product form and size band, measured on specimens after the final magnetic anneal.
| Form | Condition and size band | μmax ≥ | Hc ≤ (A/m) | ΔHc ≤ (A/m) |
|---|---|---|---|---|
| Magnetic test specimens from all product forms | Specimens held at 900 ± 10 °C for 1 h and cooled below 500 °C at less than 50 °C/h | 0.0151 H/m | 32 | 3.2 |
Minimum induction at each field strength
| Field strength H, A/m | 200 | 500 | 1000 | 2500 | 5000 | 10000 |
|---|---|---|---|---|---|---|
| Induction B ≥, T | 1.23 | 1.43 | 1.53 | 1.65 | 1.74 | 1.83 |
The magnetic anneal is normally agreed between supplier and purchaser and varies with size; state the form, size band and the magnetic properties to be tested on the order.
Mechanical minima by form
Guaranteed values differ by form, size and delivery condition; quotations confirm the specification, form, size and condition.
| Form | Condition | Rm MPa | Rp0.2 MPa | A ≥ % | Other requirements and notes |
|---|---|---|---|---|---|
| Plate, sheet and strip | |||||
| Cold-rolled sheet and strip | Supplied soft annealed | — | — | — | Also specified: Hardness 85 HV5 – 140 HV5 |
| Other | |||||
| Hot-rolled or forged bar, hot-rolled plate and strip | Supplied rolled or forged; mechanical properties are an optional contract item | ≥ 265 | — | ≥ 25 | Also specified: Hardness ≤ 195 HV5 |
Where this grade is recommended
Matched in 2 service conditions; ranks and scores computed from the condition-scoring matrix.
| Service condition | Industry | Temperature | Rank | Score |
|---|---|---|---|---|
| Motor cores & pole pieces | Automotive & Racing | ≤ 180 °C | 3 / 4 | 82 |
| Magnetic shielding & soft-magnetic parts | Semiconductor & Vac-Electronics | ≤ 120 °C | 5 / 5 | 78 |
Designations & equivalents
| Trade name(s) | ARMCO iron / Vacofer S1 / Puron / Remko |
| GOST (Russia) | ≈ Э / АРМКО |
Cross-references are common near-equivalents for search and shortlisting; substitution across standards requires clause-by-clause verification. All grades in one cross-reference table →
Applicable standards
Name the standard and its edition on the order.
Frequently asked questions
What is DT4C Electromagnetic Pure Iron?
DT4C Electromagnetic Pure Iron — Precision alloys. Solenoid cores and pole shoes — high saturation, low coercivity
What is the maximum service temperature of DT4C?
Typically about 400 °C; the practical limit depends on media, stress and design life — acceptance per the governing standard.
What is the tensile strength of DT4C?
The specified minimum tensile strength is 265 MPa for the main product form. Minima for other forms and sizes are listed under "Mechanical minima by form" on this page.
Which standards cover DT4C?
GB/T 6983—2022
Where is DT4C typically used?
Motor cores & pole pieces (Automotive & Racing); Magnetic shielding & soft-magnetic parts (Semiconductor & Vac-Electronics)
In which forms is DT4C available?
Tube, plate, strip, bar, forgings, wire and other forms — sizes and delivery condition confirmed per order, with EN 10204 3.1 / 3.2 certification.
Same series
Download PDF datasheet
This grade’s datasheet as an A4 PDF — for filing, printing or forwarding to colleagues.
Download PDF datasheetSupply & enquiry
Tube & pipeφ1 – 219 × 0.25 – 25 mm
Plate4.76 – 80 mm
Barφ8 – 300 mm
Wire & filler metalsφ0.01 – 8 mmFor this grade we can supply, against your service conditions:
- Tube, plate, strip, bar, forgings, wire and more — with size range and lead time
- Chemistry and mechanical test report (EN 10204 3.1 / 3.2)
- Like-for-like alternatives and selection advice
- Applicable standards and inspection scope
Or email us: info@kochlin.com