Steel C35RC
AISI/SAE 1035 · EN C35, 1.1060 · JIS S35C · GB 35
C35RC is a medium-carbon round-bar quality steel of the C35 type (1.1060, AISI 1035, S35C) with about 0.35 % C, relying on carbon content and normalizing or quench-and-temper for its properties.
Reference datasheet — C35RC 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
C35RC tempers and conditions
C35RC is supplied in 8 conditions, soft to hard. +AC is the default FabDigit quotes; the values on this page are for it.
Compare all 8 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
+ACDefault Spheroidize annealed | Standard cold-heading delivery state: spheroidized cementite gives maximum upsetting ductility at low hardness. | 300 | 520 | 25 | 150 HB | 51 W/m·K |
Annealed | Lowest-hardness state for heavy machining or as a starting point before quench-and-temper. | 300 | 530 | 24 | 155 HB | 10.5 % IACS |
Hot rolled | Cheapest delivery state for parts that will be re-heat-treated or only lightly machined. | 340 | 600 | 18 | 175 HB | — |
Normalized | Uniform fine ferrite-pearlite for general engineering bar; good machining and predictable response to later hardening. | 340 | 580 | 20 | 170 HB | — |
Quenched and tempered | Balanced strength/toughness condition for shafts, pins and studs after machining. | 420 | 660 | 19 | 16 HRC | 48 W/m·K |
Spheroidize annealed and cold drawn | Drawn-to-size wire/bar for multi-station cold heading and turned parts: close tolerance, bright surface, higher strength than +AC. | 500 | 590 | 12 | 178 HB | — |
Cold drawn | Straight cold-drawn bar for machined shafts and pins where drawn strength and tolerance, not headability, matter. | 550 | 650 | 10 | 192 HB | — |
Hardenability-controlled, supplied hardened and tempered | Pick when parts (e.g. class 8.8 fasteners) are quench-hardened after forming and a guaranteed Jominy band is required. | 620 | 800 | 15 | 23 HRC | — |
What is C35RC?
C35RC is a medium-carbon round-bar quality steel of the C35 type (1.1060, AISI 1035, S35C) with about 0.35 % C, relying on carbon content and normalizing or quench-and-temper for its properties. It ships untreated, annealed, spheroidize-annealed, cold-drawn, normalized, quenched-and-tempered or hardenability-tested, with defaults of 300 MPa yield, 520 MPa tensile, 25 % elongation, 150 HB (80 HRB), 51 W/m·K conductivity and service to 400 °C. Machinability (58) and formability (82) are good, but weldability is limited (score 55, CE ≈ 0.5) and there is no corrosion resistance. For higher strength in the same bar sizes, C45 is the usual alternative. C35RC has a density of 7.85 g/cm³ (0.284 lb/in³), heavier than 56% of steel grades. It melts at 1,425°C (2,597 °F). C35RC has a yield strength of 300 MPa (43.5 ksi) and a tensile strength of 520 MPa (75.4 ksi) — weaker than 86% of steel grades. Elongation at break is 25% and the elastic modulus is 205 GPa (29.7 Msi).
What is C35RC used for?
- shafts
- bolts
- gears
- axles
- machine components
Advantages
- Forms and bends easily — 82/100, better than 94% of steel grades
- Conducts heat well — 51 W/m·K (29.5 BTU/hr·ft·°F), better than 92% of steel grades
- High electrical conductivity — 10 % IACS, better than 83% of steel grades
- Ductile — tolerates forming and impact — 25%, better than 77% of steel grades
Limitations
- Low strength — 300 MPa (43.5 ksi), worse than 86% of steel grades
- Low fracture toughness — 60 MPa·√m (54.6 ksi·√in), worse than 78% of steel grades
C35RC properties
Typical room-temperature values for C35RC-+AC; bars are the position among steel grades.
Physical3
C35RC has a density of 7.85 g/cm³ (0.284 lb/in³), heavier than 56% of steel grades. It melts at 1,425°C (2,597 °F).
Mechanical16
C35RC has a yield strength of 300 MPa (43.5 ksi) and a tensile strength of 520 MPa (75.4 ksi) — weaker than 86% of steel grades. Elongation at break is 25% and the elastic modulus is 205 GPa (29.7 Msi).
Thermal6
C35RC is rated for continuous service to 400°C (752 °F). It conducts heat at 51 W/m·K (29.5 BTU/hr·ft·°F), better than 92% of steel grades. Thermal expansion is 11.7 µm/m·K (6.5 µin/in·°F).
Electrical3
C35RC conducts electricity at 10 % IACS, better than 83% of steel grades.
Chemical & Environmental3
Corrosion resistance is not recommended (10/100), worse than 86% of steel grades.
Sustainability4
Producing a kilogram of C35RC takes about 25 MJ of energy and emits 2.1 kg of CO₂ — less than 82% of steel grades. Typical recycled content is 28%.
Manufacturability7
C35RC's machinability is good (58/100, better than 75% of steel grades); weldability good (55/100); formability very good (82/100).
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. C35RC is highlighted; hover a dot for its name, or open the interactive family chart.
Working with C35RC
Is C35RC easy to machine?
Machines readily at ~65 % of 1212; spheroidized (+AC) stock can smear — prefer normalized or cold-drawn bar and sharp coated carbide with generous feed.
Can C35RC be welded?
Weldable with care (CE ≈ 0.5): use low-hydrogen consumables, 150–250 °C preheat on sections over ~20 mm and slow cooling to avoid HAZ martensite cracking.
Can C35RC be formed, bent or molded?
In +AC or +AC+C condition it cold-heads, upsets and thread-rolls well; hot forge at 1100–850 °C, then normalize before final machining.
C35RC 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 | 0.32 – 0.39 | 0.35 |
| Sikept low for cold-heading quality | ≤ 0.3 | 0.2 |
| Mn | 0.5 – 0.8 | 0.65 |
| P | ≤ 0.03 | |
| S'R' = specified sulfur range for machinability | 0.02 – 0.04 | 0.03 |
| Crresidual | ≤ 0.3 | |
| Niresidual | ≤ 0.3 | |
| Curesidual | ≤ 0.25 | |
| Moresidual | ≤ 0.1 | |
| Fe | balance |
What surface finishes work on C35RC?
No anodizing; protect with zinc or zinc-nickel plating (bake for hydrogen embrittlement above ~320 HV), phosphate + oil, black oxide or paint; polishes to a fair bright finish.
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 C35RC in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
How much does C35RC cost?
C35RC is a budget-cost steel ($), cheaper than about 90% of the materials FabDigit quotes. Part price depends far more on geometry, tolerance and quantity than on the raw stock — upload a CAD file for a live quote.
C35RC — frequently asked
What is C35RC used for?
C35RC is typically used for shafts, bolts, gears, axles and machine components. In short: balanced strength and machinability; general-purpose engineering bar; weldable only with preheat.
What is the yield strength of C35RC?
C35RC has a typical yield strength of 300 MPa (43.5 ksi) and a tensile strength of 520 MPa (75.4 ksi) — weaker than 86% of steel grades. Strength varies by condition: see the 8 listed tempers.
Is C35RC easy to machine?
Reasonably — machinability is rated good (58/100, better than 75% of steel grades). Machines readily at ~65 % of 1212; spheroidized (+AC) stock can smear — prefer normalized or cold-drawn bar and sharp coated carbide with generous feed.
Can C35RC be welded?
Yes — weldability is rated good (55/100). Weldable with care (CE ≈ 0.5): use low-hydrogen consumables, 150–250 °C preheat on sections over ~20 mm and slow cooling to avoid HAZ martensite cracking.
What surface finishes work on C35RC?
No anodizing; protect with zinc or zinc-nickel plating (bake for hydrogen embrittlement above ~320 HV), phosphate + oil, black oxide or paint; polishes to a fair bright finish.
Can C35RC be formed, bent or molded?
In +AC or +AC+C condition it cold-heads, upsets and thread-rolls well; hot forge at 1100–850 °C, then normalize before final machining.
What is the maximum service temperature of C35RC?
C35RC is rated for continuous use to about 400°C (752 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
How much does C35RC cost?
C35RC is a budget-cost steel ($), 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
- EN 10263-2 — Steel rod, bars and wire for cold heading and cold extrusion: non-heat-treatable steels — CEN (2017)
- EN 10263-4 — Steels for quenching and tempering (cold heading) — CEN (2017)
- EN 10083-2 — Steels for quenching and tempering: non-alloy steels (C35, C35R) — CEN (2006)
- ASM Handbook Vol.1 — Properties and Selection: Irons, Steels and High-Performance Alloys — ASM International (1990)
- ASM Handbook Vol.19 — Fatigue and Fracture — ASM International (1996)
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.