Steel 60Si2MnA
GB 60Si2MnA · EN 60Si2Mn A
60Si2MnA is the higher-quality (tighter P and S) version of the silicon–manganese spring steel of GB/T 1222, broadly equivalent to AISI 9260 and close to JIS SUP6.
Values for the Annealed condition
60Si2MnA tempers and conditions
60Si2MnA is supplied in 5 conditions, soft to hard. Annealed is the default FabDigit quotes; the values on this page are for it.
Compare all 5 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
AnnealedDefault spheroidize/soft annealed bar, rod or strip | Pick for machining, cold forming or blanking before the spring is hardened and tempered. | 550 | 900 | 14 | 260 HB | — |
as-rolled bar, flat or plate | Cheapest mill condition for leaf-spring blanks and forging stock that will be austenitized afterwards. | 620 | 1,000 | 11 | 30 HRC | 6 % IACS |
air cooled from ~870 °C | Used to refine and homogenize forged or hot-rolled structure before final hardening. | 650 | 1,050 | 10 | 31 HRC | 6 % IACS |
cold drawn bar / hard-drawn wire | Choose for close-tolerance bar and for wire that will be coiled then stress-relieved rather than fully hardened. | 950 | 1,150 | 7 | 35 HRC | 6 % IACS |
Quenched and tempered | The standard specification condition for 60Si2MnA springs; highest strength with acceptable ductility. | 1,500 | 1,700 | 7 | 48 HRC | — |
Supply forms, finishes and certifications
Ways 60Si2MnA is supplied — form, process route, surface or paperwork — without a datasheet of their own. The property values above apply.
| Option | What it is | Type |
|---|---|---|
OT Wire | OT | Supply form |
What is 60Si2MnA?
60Si2MnA is the higher-quality (tighter P and S) version of the silicon–manganese spring steel of GB/T 1222, broadly equivalent to AISI 9260 and close to JIS SUP6. About 1.7 % Si raises the yield ratio and elastic limit, so after oil quenching and medium-temperature tempering it reaches 1600–1800 MPa with good relaxation resistance — the default for leaf springs, coil springs, spring washers and clamp rings in bar, flat, strip and oil-tempered wire. Corrosion resistance is poor, so parts must be painted, peened or coated; surface decarburization and graphitization occur readily in hot work, impact toughness at full hardness is modest, and load-bearing capacity drops above about 250 °C (200 °C practical service ceiling). 60Si2MnA has a density of 7.85 g/cm³ (0.284 lb/in³), heavier than 56% of steel grades. It melts at 1,450°C (2,642 °F). 60Si2MnA has a yield strength of 550 MPa (79.8 ksi) and a tensile strength of 900 MPa (131 ksi) — stronger than 71% of steel grades. Elongation at break is 14% and the elastic modulus is 206 GPa (29.9 Msi).
What is 60Si2MnA used for?
- Leaf springs
- Industrial coil springs
- Spring washers
- Clamp and retaining rings
- Torsion bars
- Suspension and shock-absorber springs
- Agricultural tine springs
Limitations
- Limited service temperature — 200°C (392 °F), worse than 93% of steel grades
- Low electrical conductivity — 6 % IACS, worse than 78% of steel grades
- Difficult to weld — 25/100, worse than 77% of steel grades
- Limited ductility — 14%, worse than 75% of steel grades
60Si2MnA properties
Typical room-temperature values for 60Si2MnA-Annealed; bars are the position among steel grades.
Physical3
60Si2MnA has a density of 7.85 g/cm³ (0.284 lb/in³), heavier than 56% of steel grades. It melts at 1,450°C (2,642 °F).
Mechanical14
60Si2MnA has a yield strength of 550 MPa (79.8 ksi) and a tensile strength of 900 MPa (131 ksi) — stronger than 71% of steel grades. Elongation at break is 14% and the elastic modulus is 206 GPa (29.9 Msi).
Thermal6
60Si2MnA is rated for continuous service to 200°C (392 °F). It conducts heat at 37 W/m·K (21.4 BTU/hr·ft·°F), worse than 71% of steel grades. Thermal expansion is 11.9 µm/m·K (6.61 µin/in·°F).
Electrical3
60Si2MnA conducts electricity at 6 % IACS, worse than 78% of steel grades.
Chemical & Environmental2
Corrosion resistance is not recommended (12/100), worse than 53% of steel grades.
Sustainability4
Producing a kilogram of 60Si2MnA takes about 26 MJ of energy and emits 2 kg of CO₂ — less than 64% of steel grades. Typical recycled content is 30%.
Manufacturability7
60Si2MnA's machinability is fair (45/100, worse than 65% of steel grades); weldability poor (25/100); formability fair (45/100).
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. 60Si2MnA is highlighted; hover a dot for its name, or open the interactive family chart.
Working with 60Si2MnA
Is 60Si2MnA easy to machine?
Machine in the annealed/spheroidized state with carbide tooling and rigid setups; at 45–50 HRC only grinding, EDM or hard turning with CBN is practical.
Can 60Si2MnA be welded?
Essentially not recommended for spring service — high C plus 1.8 % Si makes it crack-sensitive; if unavoidable use low-hydrogen consumables, 250–350 °C preheat and immediate re-hardening or PWHT.
Can 60Si2MnA be formed, bent or molded?
Cold form or blank only when annealed; leaf springs are best formed hot (900–1000 °C) or formed and then austenitized at 860–880 °C, oil quenched and tempered 400–520 °C, watching for surface decarburization and graphitization.
Manufacturability
The process limits FabDigit applies to 60Si2MnA. Every 60Si2MnA part is priced by an engineer; design inside these and the quote comes back without a redesign loop.
CNC machining
| Machinability | Fair45 / 100 |
|---|---|
| ISO material group | P.2 |
| Cutting speed (rough / finish) | 180 / 210 m/min |
| Minimum wall | 0.8 mm |
| Minimum internal radius | 1 mm |
| Drill depth limit | 5× diameter |
| Best surface (machined / polished) | Ra 1.6 / — |
| Hardenable after machining | No |
Sheet metal
| Formability | Better45 / 100 |
|---|---|
| Weldability | Fair25 / 100 |
| Bendable | Yes |
60Si2MnA 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 |
|---|---|---|
| C | 0.56 – 0.64 | 0.6 |
| Si | 1.6 – 2 | 1.8 |
| Mn | 0.7 – 1 | 0.85 |
| Crresidual | ≤ 0.35 | |
| Niresidual | ≤ 0.35 | |
| Curesidual | ≤ 0.25 | |
| PA grade (high-quality) limit | ≤ 0.03 | |
| SA grade (high-quality) limit | ≤ 0.02 | |
| Fe | balance |
What surface finishes work on 60Si2MnA?
Shot peen springs before coating to recover fatigue life, then phosphate + paint, black oxide, or zinc/zinc-flake coat; no anodizing, and avoid hydrogen-charging acid pickling or electroplating without bake-out.
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).
Plating
CVD Coating
Black / Phosphate
Thermal Spray
Equivalent designations
Standards and trade names that resolve to Steel 60Si2MnA in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- EN / DIN / Werkstoff-Nr.
- 60Si2Mn A
- Other
- 9260
How much does 60Si2MnA cost?
60Si2MnA is a standard-cost steel ($$), cheaper than about 71% 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.
60Si2MnA — frequently asked
What is 60Si2MnA used for?
60Si2MnA is typically used for leaf springs, industrial coil springs, spring washers, clamp and retaining rings, torsion bars and suspension and shock-absorber springs. In short: premium spring plate.
What is the yield strength of 60Si2MnA?
60Si2MnA has a typical yield strength of 550 MPa (79.8 ksi) and a tensile strength of 900 MPa (131 ksi) — stronger than 71% of steel grades. Strength varies by condition: see the 5 listed tempers.
Is 60Si2MnA easy to machine?
Reasonably — machinability is rated fair (45/100, worse than 65% of steel grades). Machine in the annealed/spheroidized state with carbide tooling and rigid setups; at 45–50 HRC only grinding, EDM or hard turning with CBN is practical.
Can 60Si2MnA be welded?
Not readily — weldability is rated poor (25/100). Essentially not recommended for spring service — high C plus 1.8 % Si makes it crack-sensitive; if unavoidable use low-hydrogen consumables, 250–350 °C preheat and immediate re-hardening or PWHT.
What surface finishes work on 60Si2MnA?
Shot peen springs before coating to recover fatigue life, then phosphate + paint, black oxide, or zinc/zinc-flake coat; no anodizing, and avoid hydrogen-charging acid pickling or electroplating without bake-out.
Can 60Si2MnA be formed, bent or molded?
Cold form or blank only when annealed; leaf springs are best formed hot (900–1000 °C) or formed and then austenitized at 860–880 °C, oil quenched and tempered 400–520 °C, watching for surface decarburization and graphitization.
What is the maximum service temperature of 60Si2MnA?
60Si2MnA 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 60Si2MnA cost?
60Si2MnA is a standard-cost steel ($$), cheaper than about 71% 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.
Can FabDigit make parts in 60Si2MnA?
Yes — 60Si2MnA is available for CNC machining and sheet metal; every part is priced by an engineer rather than instantly. Upload a STEP file to get a price and a DFM check.
Sources
- GB/T 1222 (2016)
- ASM Handbook Vol. 1 — Properties and Selection: Irons, Steels, and High-Performance Alloys (AISI 9260) — 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.