Steel 35A250
EN 35A250
35A250 is a 0.35 mm non-oriented electrical steel to the JIS A-series designation, alloyed with silicon and aluminium and supplied flat-rolled or stress-relief annealed with inorganic (A), semi-organic (E) or organic (C) coatings.
Reference datasheet — 35A250 is not in the instant-quote catalog. Upload your part and an engineer will quote it in this grade or suggest the closest stocked equivalent.
35A250 tempers and conditions
35A250 is supplied in 3 conditions, soft to hard.
Compare all 3 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
Stress-relief annealed after blanking | Choose when punching/stacking stresses have raised core loss and the last few percent of efficiency matters; slightly softer, magnetically best. | 340 | 470 | 22 | 155 HB | 3.4 % IACS |
Solution annealed | Pick for cores that will be welded or stress-relief annealed after stacking; lowest coating build-up, highest stacking factor. | 370 | 500 | 16 | 170 HB | 3.3 % IACS |
Organic (resin) insulation coating, high interlaminar resistance | Use where maximum interlaminar resistance and punch lubricity are needed and no post-punch annealing is planned. | 370 | 500 | 16 | 170 HB | 3.3 % IACS |
Supply forms, finishes and certifications
Ways 35A250 is supplied — form, process route, surface or paperwork — without a datasheet of their own. The property values above apply.
| Option | What it is | Type |
|---|---|---|
E | Semi-organic (resin-modified inorganic) insulation coating | Surface finish |
FPDefault | Fully processed, mill-annealed with insulation coating | Surface finish |
What is 35A250?
35A250 is a 0.35 mm non-oriented electrical steel to the JIS A-series designation, alloyed with silicon and aluminium and supplied flat-rolled or stress-relief annealed with inorganic (A), semi-organic (E) or organic (C) coatings. It combines low core loss with isotropic magnetic behaviour, so it is specified for high-efficiency and servo motor stator and rotor laminations. Strength is high for the family at 370 MPa yield and 500 MPa tensile, but elongation is 16 % and service is capped at 200 °C by the coating. 50W800 is the lower-cost, higher-loss alternative. 35A250 has a density of 7.6 g/cm³ (0.275 lb/in³), lighter than 98% of steel grades. It melts at 1,480°C (2,696 °F). 35A250 has a yield strength of 370 MPa (53.7 ksi) and a tensile strength of 500 MPa (72.5 ksi) — weaker than 70% of steel grades. Elongation at break is 16% and the elastic modulus is 190 GPa (27.6 Msi).
What is 35A250 used for?
- High-efficiency motor stator laminations
- Servo motor rotor and stator cores
- Progressive-die blanked lamination packs
- Bonded lamination stacks
- Laser-cut prototype laminations
Limitations
- Limited service temperature — 200°C (392 °F), worse than 93% of steel grades
- Poor heat conductor — 23 W/m·K (13.3 BTU/hr·ft·°F), worse than 92% of steel grades
- Low electrical conductivity — 3.3 % IACS, worse than 86% of steel grades
- Difficult to machine — 40/100, worse than 77% of steel grades
35A250 properties
Typical room-temperature values; bars are the position among steel grades.
Physical3
35A250 has a density of 7.6 g/cm³ (0.275 lb/in³), lighter than 98% of steel grades. It melts at 1,480°C (2,696 °F).
Mechanical12
35A250 has a yield strength of 370 MPa (53.7 ksi) and a tensile strength of 500 MPa (72.5 ksi) — weaker than 70% of steel grades. Elongation at break is 16% and the elastic modulus is 190 GPa (27.6 Msi).
Thermal6
35A250 is rated for continuous service to 200°C (392 °F). It conducts heat at 23 W/m·K (13.3 BTU/hr·ft·°F), worse than 92% of steel grades. Thermal expansion is 11.8 µm/m·K (6.56 µin/in·°F).
Electrical3
35A250 conducts electricity at 3.3 % IACS, worse than 86% of steel grades.
Chemical & Environmental3
Corrosion resistance is poor (15/100), better than 75% of steel grades.
Sustainability4
Producing a kilogram of 35A250 takes about 32 MJ of energy and emits 2.4 kg of CO₂ — more than 70% of steel grades. Typical recycled content is 15%.
Manufacturability7
35A250's machinability is fair (40/100, worse than 77% of steel grades); weldability fair (40/100); formability good (55/100).
Common Calculations5
Values are nominal handbook figures for design screening. Certified mill or lot data ships with every FabDigit order on request.
Strength versus weight in the steel family
Yield strength against density for every steel grade FabDigit runs. 35A250 is highlighted; hover a dot for its name, or open the interactive family chart.
Working with 35A250
Is 35A250 easy to machine?
Fabricated almost entirely by precision blanking/progressive-die punching or laser/wire cutting; the high Si+Al content is abrasive, so use carbide dies, tight clearance (~5 % of thickness) and frequent regrind to limit burrs and cut-edge loss.
Can 35A250 be welded?
TIG/laser tack or edge welding of stacks is possible but the fused and heat-affected zone shorts laminations and raises core loss — prefer bonding, cleating or interlocking, and stress-relief anneal after any welding if magnetics are critical.
Can 35A250 be formed, bent or molded?
Good punchability but limited ductility: avoid tight bends, deep drawing or aggressive flattening; keep coil set and residual stress low because plastic strain directly degrades permeability and loss.
35A250 chemical composition (wt %)
Limits by weight percent from the governing specification, written the way the spec states them — a single maximum for impurities, a range for alloying elements, and the base element as balance. Nominal is the typical mid-range value.
| Element | Spec limit (wt %) | Nominal |
|---|---|---|
| Siraises resistivity, lowers eddy-current loss | 2.6 – 3.3 | 3 |
| Al | 0.2 – 0.9 | 0.6 |
| Mn | 0.1 – 0.5 | 0.25 |
| Ckept ultra-low to avoid magnetic ageing | ≤ 0.01 | 0 |
| S | ≤ 0.01 | 0 |
| P | ≤ 0.05 | 0.02 |
| N | ≤ 0 | 0 |
| Fe | balance |
What surface finishes work on 35A250?
Supplied pre-coated (inorganic A / semi-organic E / organic C); no further plating or anodizing — protect cut edges with varnish or resin impregnation, and match the coating class to the planned 750 °C stress-relief anneal.
Surface treatments FabDigit runs on steel parts — pick them in the quote configurator or call them out on the drawing. Each links to its datasheet in the surface-finish library (thickness, specs, call-out, material verdicts).
Organic Coating
Black / Phosphate
Thermal Spray
How much does 35A250 cost?
35A250 is a budget-cost steel ($), cheaper than about 90% of the materials FabDigit quotes. Part price depends far more on geometry, tolerance and quantity than on the raw stock — upload a CAD file for a live quote.
35A250 — frequently asked
What is 35A250 used for?
35A250 is typically used for high-efficiency motor stator laminations, servo motor rotor and stator cores, progressive-die blanked lamination packs, bonded lamination stacks and laser-cut prototype laminations. In short: JIS low-loss non-oriented grade; isotropic magnetic properties; three coating classes offered.
What is the yield strength of 35A250?
35A250 has a typical yield strength of 370 MPa (53.7 ksi) and a tensile strength of 500 MPa (72.5 ksi) — weaker than 70% of steel grades. Strength varies by condition: see the 3 listed tempers.
Is 35A250 easy to machine?
Not especially — machinability is rated fair (40/100, worse than 77% of steel grades). Fabricated almost entirely by precision blanking/progressive-die punching or laser/wire cutting; the high Si+Al content is abrasive, so use carbide dies, tight clearance (~5 % of thickness) and frequent regrind to limit burrs and cut-edge loss.
Can 35A250 be welded?
With care — weldability is rated fair (40/100). TIG/laser tack or edge welding of stacks is possible but the fused and heat-affected zone shorts laminations and raises core loss — prefer bonding, cleating or interlocking, and stress-relief anneal after any welding if magnetics are critical.
What surface finishes work on 35A250?
Supplied pre-coated (inorganic A / semi-organic E / organic C); no further plating or anodizing — protect cut edges with varnish or resin impregnation, and match the coating class to the planned 750 °C stress-relief anneal.
Can 35A250 be formed, bent or molded?
Good punchability but limited ductility: avoid tight bends, deep drawing or aggressive flattening; keep coil set and residual stress low because plastic strain directly degrades permeability and loss.
What is the maximum service temperature of 35A250?
35A250 is rated for continuous use to about 200°C (392 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
How much does 35A250 cost?
35A250 is a budget-cost steel ($), cheaper than about 90% of the materials FabDigit quotes. Part price depends far more on geometry, tolerance and quantity than on the raw stock — upload a CAD file for a live quote.
Sources
- JIS C 2552 — Non-oriented electrical steel strip — JSA (2019)
- Non-oriented electrical steel sheet product data (0.35 mm grades) — Nippon Steel / JFE Steel (2023)
- ASM Handbook Vol.1 — Properties and Selection: Irons, Steels and High-Performance Alloys (magnetically soft materials) — ASM International (1990)
Property data is compiled from published supplier and standards handbooks and normalised for comparison; hardness values on non-Brinell scales are converted approximately for charting only. Manufacturability limits are FabDigit quote-engine defaults and may be relaxed by engineering review. Nothing on this page is a certification — request mill certs, CoC or material test reports with your order.