Steel 100CrMnSi6-6
EN 100CrMnSi6-6
100CrMnSi6-6 (1.3519) is a higher-alloy Cr-Mn-Si through-hardening bearing steel with deep hardenability, supplied as-rolled (+AR), spheroidize annealed (+AC), cold drawn (+AC+C) or heat treated to 60–64 HRC, including bainite-hardened (BH) tempers.
Reference datasheet — 100CrMnSi6-6 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.
Values for the +AC condition
100CrMnSi6-6 tempers and conditions
100CrMnSi6-6 is supplied in 7 conditions, soft to hard. +AC is the default FabDigit quotes; the values on this page are for it.
Compare all 7 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
+ACDefault Spheroidize annealed | Pick the spheroidize (soft) annealed stock condition, ≤217 HB, as the standard stock item for turning, cold heading and subsequent through hardening. | 410 | 680 | 22 | 195 HB | 44 W/m·K |
Spheroidize annealed, peeled / turned-and-polished bar | Use peeled or turned-and-polished annealed bar for large-diameter bearing ring blanks: annealed properties are kept while the decarburized layer and surface defects are removed. | 410 | 680 | 22 | 195 HB | 4.3 % IACS |
Hot rolled | Order as-rolled black bar as the cheapest blank form; the fine pearlitic structure at 290 HB machines poorly, so plan on spheroidize annealing before cutting. | 620 | 1,050 | 10 | 30 HRC | — |
Spheroidize annealed then cold drawn bright bar | Choose spheroidize annealed then cold drawn bright bar for small roller and pin blanks on automatic lathes; tolerance and finish improve while formability falls to 25. | 660 | 820 | 10 | 240 HB | — |
Bainite hardened (austempered), 58–62 HRC | Choose bainite hardened (austempered) material at 58–62 HRC for large rings under shock loads or contaminated lubrication, where compressive surface residual stress is wanted. | 1,700 | 2,100 | 1.5 | 60 HRC | 3.9 % IACS |
Through hardened, dimensionally stabilized (temper ≥200 °C), 58–62 HRC | Pick the dimensionally stabilized version, tempered at 200 °C or above to 58–62 HRC, for bearings running long-term at 150–200 °C (S1/S2 stabilization classes). | 1,750 | 2,150 | 1 | 60 HRC | 3.9 % IACS |
Through hardened + tempered 150–180 °C, 60–64 HRC | Specify through hardened and tempered at 150–180 °C for finished bearings: martensite plus residual carbides gives 60 HRC with the best wear and contact fatigue life, but almost no machinability. | 1,900 | 2,300 | 1 | 62 HRC | 34 W/m·K |
What is 100CrMnSi6-6?
100CrMnSi6-6 (1.3519) is a higher-alloy Cr-Mn-Si through-hardening bearing steel with deep hardenability, supplied as-rolled (+AR), spheroidize annealed (+AC), cold drawn (+AC+C) or heat treated to 60–64 HRC, including bainite-hardened (BH) tempers. Engineers select it for large-section bearing rings and heavy rollers where martensite must form to full depth. Annealed bar is about 410 MPa yield, 680 MPa tensile, 22 % elongation, 195 HB and 44 W/m·K, with service to roughly 200 °C. Weldability (8) and corrosion resistance (11) are both very low; 100CrMnSi6-4 is the nearest alternative for slightly thinner walls. 100CrMnSi6-6 has a density of 7.81 g/cm³ (0.282 lb/in³), lighter than 84% of steel grades. It melts at 1,400°C (2,552 °F). 100CrMnSi6-6 has a yield strength of 410 MPa (59.5 ksi) and a tensile strength of 680 MPa (98.6 ksi) — weaker than 57% of steel grades. Elongation at break is 22% and the elastic modulus is 210 GPa (30.5 Msi).
What is 100CrMnSi6-6 used for?
- Large-section bearing rings
- Heavy rollers
- Rolling mill bearing races
- Slewing ring raceways
- Spherical roller bearing outer rings
- Large tapered rollers
- Thick-wall bearing sleeves
Advantages
- Polishes to a fine finish — 80/100, better than 97% of steel grades
Limitations
- Difficult to weld — 8/100, worse than 99% of steel grades
- Limited service temperature — 200°C (392 °F), worse than 93% of steel grades
- Low electrical conductivity — 4.3 % IACS, worse than 82% of steel grades
100CrMnSi6-6 properties
Typical room-temperature values for 100CrMnSi6-6-+AC; bars are the position among steel grades.
Physical3
100CrMnSi6-6 has a density of 7.81 g/cm³ (0.282 lb/in³), lighter than 84% of steel grades. It melts at 1,400°C (2,552 °F).
Mechanical15
100CrMnSi6-6 has a yield strength of 410 MPa (59.5 ksi) and a tensile strength of 680 MPa (98.6 ksi) — weaker than 57% of steel grades. Elongation at break is 22% and the elastic modulus is 210 GPa (30.5 Msi).
Thermal6
100CrMnSi6-6 is rated for continuous service to 200°C (392 °F). It conducts heat at 44 W/m·K (25.4 BTU/hr·ft·°F), better than 57% of steel grades. Thermal expansion is 11.7 µm/m·K (6.5 µin/in·°F).
Electrical3
100CrMnSi6-6 conducts electricity at 4.3 % IACS, worse than 82% of steel grades.
Chemical & Environmental3
Corrosion resistance is not recommended (11/100), worse than 73% of steel grades.
Sustainability4
Producing a kilogram of 100CrMnSi6-6 takes about 30 MJ of energy and emits 2.2 kg of CO₂ — more than 56% of steel grades. Typical recycled content is 30%.
Manufacturability6
100CrMnSi6-6's machinability is fair (45/100, worse than 65% of steel grades); weldability not recommended (8/100); 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. 100CrMnSi6-6 is highlighted; hover a dot for its name, or open the interactive family chart.
Working with 100CrMnSi6-6
Is 100CrMnSi6-6 easy to machine?
Cut only in the spheroidize-annealed condition (≤217 HB) using coated carbide at low speed and heavier feed. After hardening, CBN hard turning or grinding is required.
Can 100CrMnSi6-6 be welded?
Practically unweldable: high carbon equivalent and strong sensitivity to quench cracking. Use only for repair, with preheat above 300 °C and immediate tempering.
Can 100CrMnSi6-6 be formed, bent or molded?
In the annealed condition it can be cold headed, cold extruded and warm forged into ring blanks. Forge at roughly 1050–850 °C, then slow-cool and spheroidize anneal.
100CrMnSi6-6 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 | 0.93 – 1.05 | 0.99 |
| Sihigh Si raises hardenability and temper resistance | 0.5 – 0.75 | 0.62 |
| Mn | 1.1 – 1.4 | 1.25 |
| Cr | 1.4 – 1.65 | 1.5 |
| Moresidual element maximum | ≤ 0.1 | |
| Niresidual element maximum | ≤ 0.3 | |
| Curesidual element maximum | ≤ 0.3 | |
| P | ≤ 0.03 | |
| S | ≤ 0.02 | |
| Al | ≤ 0.05 | |
| O15 ppm max (vacuum-degassed bearing steel) | ≤ 0 | |
| Fe | balance |
What surface finishes work on 100CrMnSi6-6?
No corrosion resistance — use rust-preventive oil, phosphating, black oxide or chrome plating. Ground and superfinished raceways reach a mirror finish below Ra 0.05 µm.
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
Equivalent designations
Standards and trade names that resolve to Steel 100CrMnSi6-6 in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- EN / DIN / Werkstoff-Nr.
- 1.3519
How much does 100CrMnSi6-6 cost?
100CrMnSi6-6 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.
100CrMnSi6-6 — frequently asked
What is 100CrMnSi6-6 used for?
100CrMnSi6-6 is typically used for large-section bearing rings, heavy rollers, rolling mill bearing races, slewing ring raceways, spherical roller bearing outer rings and large tapered rollers. In short: deepest-hardening bearing grade; for thick bearing rings; very low weldability.
What is the yield strength of 100CrMnSi6-6?
100CrMnSi6-6 has a typical yield strength of 410 MPa (59.5 ksi) and a tensile strength of 680 MPa (98.6 ksi) — weaker than 57% of steel grades. Strength varies by condition: see the 7 listed tempers.
Is 100CrMnSi6-6 easy to machine?
Reasonably — machinability is rated fair (45/100, worse than 65% of steel grades). Cut only in the spheroidize-annealed condition (≤217 HB) using coated carbide at low speed and heavier feed. After hardening, CBN hard turning or grinding is required.
Can 100CrMnSi6-6 be welded?
Not readily — weldability is rated not recommended (8/100). Practically unweldable: high carbon equivalent and strong sensitivity to quench cracking. Use only for repair, with preheat above 300 °C and immediate tempering.
What surface finishes work on 100CrMnSi6-6?
No corrosion resistance — use rust-preventive oil, phosphating, black oxide or chrome plating. Ground and superfinished raceways reach a mirror finish below Ra 0.05 µm.
Can 100CrMnSi6-6 be formed, bent or molded?
In the annealed condition it can be cold headed, cold extruded and warm forged into ring blanks. Forge at roughly 1050–850 °C, then slow-cool and spheroidize anneal.
What is the maximum service temperature of 100CrMnSi6-6?
100CrMnSi6-6 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 100CrMnSi6-6 +AC and 100CrMnSi6-6-BH?
+AC is the default condition — pick the spheroidize (soft) annealed stock condition, ≤217 HB, as the standard stock item for turning, cold heading and subsequent through hardening. BH: choose bainite hardened (austempered) material at 58–62 HRC for large rings under shock loads or contaminated lubrication, where compressive surface residual stress is wanted. Yield strength is 410 MPa in +AC versus 1,700 MPa in BH.
How much does 100CrMnSi6-6 cost?
100CrMnSi6-6 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
- ISO 683-17 Heat-treatable steels — Ball and roller bearing steels — ISO (2014)
- GB/T 18254 (GCr15SiMn) — SAC (2016)
- DIN 17230 Wälzlagerstähle (historical, 1.3519) — DIN (1980)
- ASM Handbook Vol.1: Properties and Selection — Irons, Steels — ASM International (1990)
- Bearing steel bar datasheets (Ovako / GCr15SiMn) — producers (2023)
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.