Steel SKS93 · temper · default condition
Steel SKS93 Annealed
Properties of the Annealed condition, compared with the other SKS93 tempers.
Default stock condition for machining, blanking and pre-heat-treatment fabrication (≤217 HB).
What is SKS93 Annealed?
SKS93 Annealed is SKS93 in the Annealed temper — default stock condition for machining, blanking and pre-heat-treatment fabrication (≤217 HB). SKS93 Annealed has a yield strength of 450 MPa (65.3 ksi) and a tensile strength of 750 MPa (109 ksi) — stronger than 53% of steel grades. Elongation at break is 17% and the elastic modulus is 210 GPa (30.5 Msi). SKS93 Annealed has a density of 7.85 g/cm³ (0.284 lb/in³), heavier than 56% of steel grades. It melts at 1,420°C (2,588 °F).
Advantages
- Polishes to a fine finish — 75/100, better than 94% of steel grades
Limitations
- Limited service temperature — 200°C (392 °F), worse than 93% of steel grades
- Difficult to weld — 18/100, worse than 87% of steel grades
- Poor heat conductor — 34 W/m·K (19.6 BTU/hr·ft·°F), worse than 77% of steel grades
SKS93 Annealed properties
Typical room-temperature values for SKS93 Annealed — 12 properties are specific to this condition; the rest are grade-level values shared by every SKS93 temper. Each bar shows where the value sits among the steel grades in FabDigit's library — further right is higher.
Physical3
SKS93 Annealed has a density of 7.85 g/cm³ (0.284 lb/in³), heavier than 56% of steel grades. It melts at 1,420°C (2,588 °F).
Mechanical15
SKS93 Annealed has a yield strength of 450 MPa (65.3 ksi) and a tensile strength of 750 MPa (109 ksi) — stronger than 53% of steel grades. Elongation at break is 17% and the elastic modulus is 210 GPa (30.5 Msi).
Thermal6
SKS93 Annealed is rated for continuous service to 200°C (392 °F). It conducts heat at 34 W/m·K (19.6 BTU/hr·ft·°F), worse than 77% of steel grades. Thermal expansion is 11.8 µm/m·K (6.56 µin/in·°F).
Electrical3
SKS93 Annealed conducts electricity at 8.6 % IACS, better than 66% of steel grades.
Chemical & Environmental3
Corrosion resistance is not recommended (12/100), worse than 53% of steel grades.
Sustainability4
Producing a kilogram of SKS93 Annealed takes about 34 MJ of energy and emits 2.4 kg of CO₂ — more than 82% of steel grades. Typical recycled content is 30%.
Manufacturability7
SKS93 Annealed's machinability is fair (45/100, worse than 65% of steel grades); weldability poor (18/100); 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.
Other SKS93 tempers and conditions
SKS93 is also supplied in 6 other conditions. The full side-by-side table is on the SKS93 overview.
- AnnealedDefaultDefault stock condition for machining, blanking and pre-heat-treatment fabrication (≤217 HB).450 MPa yield · 200 HB
- Q&T 61-64 HRCMaximum-hardness condition (JIS quench requirement ≥63 HRC) for keen cutting edges and wear surfaces; lowest toughness.2,300 MPa tensile
- Q&T 58-61 HRCBalanced hardness/toughness for cutters, gauges and small blanking dies.1,850 MPa yield · 60 HRC
- Q&T 54-58 HRCTougher tempered condition for saw blades, scrapers and thin springy tools needing bend tolerance.1,650 MPa yield · 56 HRC
Working with SKS93 Annealed
Is SKS93 easy to machine?
Machine only in the annealed (≤217 HB) state with sharp carbide or HSS-Co tooling and modest speeds; hardened material needs grinding, EDM or CBN.
Can SKS93 be welded?
Poor weldability — high carbon promotes cracking; if unavoidable, preheat 250–350 °C, use matching/low-hydrogen filler and temper immediately after welding.
Can SKS93 be formed, bent or molded?
Cold form, bend and blank in the soft annealed strip condition; harden after forming, and stress-relieve heavily worked blanks before quenching to limit distortion.
What surface finishes work on SKS93?
Grind and polish after hardening to a fine edge; protect with oil, black oxide, phosphate or thin chrome/nitride coating since the bare steel rusts quickly.
SKS93 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 | 1 – 1.1 | 1.05 |
| Sisome secondary tables list Si ≤0.50 | 0.1 – 0.35 | 0.25 |
| Mn | 0.8 – 1.1 | 0.95 |
| P | ≤ 0.03 | — |
| S | ≤ 0.03 | — |
| Cr | 0.2 – 0.6 | 0.4 |
| W | 0.5 – 1 | 0.75 |
| Curesidual max | ≤ 0.25 | — |
| Niresidual max | ≤ 0.25 | — |
| Fe | balance | — |
SKS93 Annealed — frequently asked
What is SKS93 Annealed used for?
SKS93 Annealed is typically used for hand saw and band saw blades, thin-blade cutting knives, scrapers and putty blades, small blanking and piercing dies, measuring gauges and straight edges and hand tool blades and chisels. In short: oil-hardening tool steel.
What is the yield strength of SKS93 Annealed?
SKS93 Annealed has a typical yield strength of 450 MPa (65.3 ksi) and a tensile strength of 750 MPa (109 ksi) — stronger than 53% of steel grades. Strength varies by condition: see the 7 listed tempers.
Is SKS93 Annealed easy to machine?
Reasonably — machinability is rated fair (45/100, worse than 65% of steel grades). Machine only in the annealed (≤217 HB) state with sharp carbide or HSS-Co tooling and modest speeds; hardened material needs grinding, EDM or CBN.
Can SKS93 Annealed be welded?
Not readily — weldability is rated poor (18/100). Poor weldability — high carbon promotes cracking; if unavoidable, preheat 250–350 °C, use matching/low-hydrogen filler and temper immediately after welding.
What surface finishes work on SKS93 Annealed?
Grind and polish after hardening to a fine edge; protect with oil, black oxide, phosphate or thin chrome/nitride coating since the bare steel rusts quickly.
Can SKS93 Annealed be formed, bent or molded?
Cold form, bend and blank in the soft annealed strip condition; harden after forming, and stress-relieve heavily worked blanks before quenching to limit distortion.
What is the maximum service temperature of SKS93 Annealed?
SKS93 Annealed 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.
What is the difference between SKS93 Annealed and SKS93 CW-Hard?
Annealed is the default condition — default stock condition for machining, blanking and pre-heat-treatment fabrication (≤217 HB). CW-Hard: work-hardened strip used where a stiff spring-like temper is enough without quenching. Yield strength is 450 MPa in Annealed versus 950 MPa in CW-Hard.
Can FabDigit make parts in SKS93 Annealed?
Yes — SKS93 Annealed is available for CNC machining with instant online pricing. Upload a STEP file to get a price and a DFM check.
Sources
- JIS G 4404 — Alloy tool steels — Japanese Standards Association (2015)
- ASM Handbook Vol. 1 — Properties and Selection: Irons, Steels, and High-Performance Alloys (tool steels) — ASM International (1990)
- ASM Handbook Vol. 16 — Machining — ASM International (1989)
- ASM Handbook Vol. 4 — Heat Treating (tool steel hardening practice) — ASM International (1991)
- GB/T 1299 — (comparison of alloy tool steel grades) — SAC (China) (2014)
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.