Steel M800-65A-SRA
Heat-treated state
SRA = stress-relief annealed after blanking
Use when punching/cutting burr stresses must be removed to recover 5–15 % of core loss; softens the sheet noticeably.
Values for the SRA condition
What is M800-65A-SRA?
M800-65A-SRA is M800-65A heat treated to SRA — use when punching/cutting burr stresses must be removed to recover 5–15 % of core loss; softens the sheet noticeably. M800-65A-SRA has a yield strength of 265 MPa (38.4 ksi) and a tensile strength of 390 MPa (56.6 ksi) — weaker than 92% of steel grades. Elongation at break is 33% and the elastic modulus is 205 GPa (29.7 Msi). M800-65A-SRA has a density of 7.8 g/cm³ (0.282 lb/in³), lighter than 87% of steel grades. It melts at 1,500°C (2,732 °F).
Advantages
- Ductile — tolerates forming and impact — 33%, better than 96% of steel grades
- Forms and bends easily — 78/100, better than 91% of steel grades
- Good corrosion resistance — 22/100, better than 90% of steel grades
Limitations
- Hard to polish — 40/100, worse than 96% of steel grades
- Limited service temperature — 200°C (392 °F), worse than 93% of steel grades
- Low strength — 265 MPa (38.4 ksi), worse than 92% of steel grades
M800-65A-SRA properties
Typical room-temperature values for M800-65A-SRA; 5 are specific to this condition. Other listed values are M800-65A reference data and may not represent this condition. Bars are the position among steel grades.
Physical3
M800-65A-SRA has a density of 7.8 g/cm³ (0.282 lb/in³), lighter than 87% of steel grades. It melts at 1,500°C (2,732 °F).
Mechanical13
M800-65A-SRA has a yield strength of 265 MPa (38.4 ksi) and a tensile strength of 390 MPa (56.6 ksi) — weaker than 92% of steel grades. Elongation at break is 33% and the elastic modulus is 205 GPa (29.7 Msi).
Thermal6
M800-65A-SRA is rated for continuous service to 200°C (392 °F). It conducts heat at 45 W/m·K (26 BTU/hr·ft·°F), better than 66% of steel grades. Thermal expansion is 12 µm/m·K (6.67 µin/in·°F).
Electrical3
M800-65A-SRA conducts electricity at 8.6 % IACS, better than 66% of steel grades.
Chemical & Environmental3
Corrosion resistance is poor (22/100), better than 90% of steel grades.
Sustainability4
Producing a kilogram of M800-65A-SRA takes about 32 MJ of energy and emits 2.4 kg of CO₂ — more than 70% of steel grades. Typical recycled content is 25%.
Manufacturability7
M800-65A-SRA's machinability is fair (50/100, worse than 53% of steel grades); weldability good (55/100); formability very good (78/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with M800-65A-SRA
Is M800-65A easy to machine?
Almost always blanked on progressive dies or wire-EDM/laser cut for prototypes; keep punch clearance ~5–8 % of thickness and burrs <25 µm, since burrs short-circuit laminations and raise loss.
Can M800-65A be welded?
TIG/laser stack welding of the outer core is common but the heat-affected zone loses magnetic quality; keep weld beads short and away from flux paths.
Can M800-65A be formed, bent or molded?
Excellent punchability and moderate deep-drawability for pole shoes; the 0.65 mm gauge is stiff enough for simple bending but springback is noticeable.
What surface finishes work on M800-65A?
Supplied with C-3/C-5/C-6 core-plate insulation; bare material must be varnished, oxidised or oiled promptly because it rusts in humid storage.
M800-65A 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 |
|---|---|---|
| Ckept very low to avoid magnetic ageing | ≤ 0.01 | 0 |
| Silow alloying level typical of high-loss economy grades | 0.3 – 1.2 | 0.7 |
| Al | 0.1 – 0.5 | 0.25 |
| Mn | 0.15 – 0.6 | 0.3 |
| Psometimes added for resistivity/strength | ≤ 0.1 | 0.03 |
| S | ≤ 0.01 | 0.01 |
| N | ≤ 0.01 | 0 |
| FeEN 10106 specifies magnetic properties, not chemistry; values are typical mill analysis | balance |
M800-65A-SRA — frequently asked
What is M800-65A-SRA used for?
M800-65A-SRA is typically used for low-cost motors, ballasts and small transformers. In short: lowest-cost non-oriented grade; thick 0.65 mm lamination gauge; higher loss than M400-50A.
What is the yield strength of M800-65A-SRA?
M800-65A-SRA has a typical yield strength of 265 MPa (38.4 ksi) and a tensile strength of 390 MPa (56.6 ksi) — weaker than 92% of steel grades.
Is M800-65A-SRA easy to machine?
Reasonably — machinability is rated fair (50/100, worse than 53% of steel grades). Almost always blanked on progressive dies or wire-EDM/laser cut for prototypes; keep punch clearance ~5–8 % of thickness and burrs <25 µm, since burrs short-circuit laminations and raise loss.
Can M800-65A-SRA be welded?
Yes — weldability is rated good (55/100). TIG/laser stack welding of the outer core is common but the heat-affected zone loses magnetic quality; keep weld beads short and away from flux paths.
What surface finishes work on M800-65A-SRA?
Supplied with C-3/C-5/C-6 core-plate insulation; bare material must be varnished, oxidised or oiled promptly because it rusts in humid storage.
Can M800-65A-SRA be formed, bent or molded?
Excellent punchability and moderate deep-drawability for pole shoes; the 0.65 mm gauge is stiff enough for simple bending but springback is noticeable.
What is the maximum service temperature of M800-65A-SRA?
M800-65A-SRA 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.
Sources
- EN 10106 — Cold rolled non-oriented electrical steel strip and sheet delivered in the fully processed state — CEN (2015)
- ASM Handbook Vol. 1 — Properties and Selection: Irons, Steels and High-Performance Alloys (magnetically soft materials) — ASM International (1990)
- Non-oriented fully processed electrical steel product data (M-series grades, coatings C-3/C-5/C-6) — European/Chinese electrical steel producers (2023)
Property data is compiled from published supplier and standards handbooks and normalised for comparison. Nothing on this page is a certification — request mill certs, CoC or material test reports with your order.