Steel 1335-HR (Hot rolled)
Supply condition
AISI/SAE 1335 · UNS G13350
Cheapest mill condition for parts that will be fully heat treated after rough machining.
Values for the HR condition
Other 1335 tempers and conditions
1335 is listed in 12 conditions; see the grade overview at 1335.
Compare all 12 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
HRThis page Hot rolled | Cheapest mill condition for parts that will be fully heat treated after rough machining. | 415 | 690 | 22 | 200 HB | — |
Solution annealed | Softest condition, chosen for deep machining, cold forming or before re-hardening. | 440 | 675 | 26 | 190 HB | — |
NDefault Normalized | Standard stock condition for medium-strength shafts and forgings needing uniform structure and good toughness without Q&T. | 540 | 810 | 23 | 21 HRC | — |
Q&T 650 °C | Softest Q&T level; maximum toughness and machinability where only moderate strength is needed. | 600 | 780 | 23 | 21 HRC | — |
Cold drawn | Pick for tight tolerance, bright finish shafting where higher yield and better chip control are wanted without heat treatment. | 650 | 760 | 12 | 223 HB | — |
Induction hardened | Use when a tough Q&T core must carry the load while journals or splines need 50+ HRC wear resistance. | 820 | 960 | 16 | 55 HRC | 7.5 % IACS |
Q&T 540 °C | Standard tough condition (~30 HRC) for drive shafts and forged levers subject to impact. | 830 | 960 | 18 | 30 HRC | — |
quenched and tempered to hardness band | Common purchase specification for machined shafts and gear blanks bought heat treated to a hardness window. | 830 | 965 | 18 | 30 HRC | — |
Q&T 425 °C | Balanced strength/toughness level used for heavily loaded shafts, spindles and bolts. | 1,080 | 1,180 | 15 | 38 HRC | — |
quenched and tempered to hardness band | Higher-strength purchased condition for wear-loaded pins, sprockets and small shafts in thin sections. | 1,110 | 1,240 | 14 | 40 HRC | — |
Q&T 315 °C | High strength with slightly better ductility than 205 °C temper; avoid this range if temper embrittlement is a concern. | 1,340 | 1,480 | 13 | 45 HRC | — |
Q&T 205 °C | Maximum hardness and strength for wear parts; low ductility and notch sensitivity, rarely used on large sections. | 1,450 | 1,690 | 12 | 49 HRC | — |
What is 1335-HR?
1335-HR is 1335 supplied in the HR condition — cheapest mill condition for parts that will be fully heat treated after rough machining. 1335-HR has a yield strength of 415 MPa (60.2 ksi) and a tensile strength of 690 MPa (100 ksi) — weaker than 56% of steel grades. Elongation at break is 22% and the elastic modulus is 205 GPa (29.7 Msi). 1335-HR 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). N is the default condition FabDigit quotes; HR is available on request or by drawing note.
1335-HR properties
Typical room-temperature values for 1335-HR; 10 are specific to this condition. Other listed values are 1335 reference data and may not represent this condition. Bars are the position among steel grades.
Physical3
1335-HR 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
1335-HR has a yield strength of 415 MPa (60.2 ksi) and a tensile strength of 690 MPa (100 ksi) — weaker than 56% of steel grades. Elongation at break is 22% and the elastic modulus is 205 GPa (29.7 Msi).
Thermal6
1335-HR is rated for continuous service to 400°C (752 °F). It conducts heat at 43 W/m·K (24.8 BTU/hr·ft·°F), better than 51% of steel grades. Thermal expansion is 12.2 µm/m·K (6.78 µin/in·°F).
Electrical3
1335-HR conducts electricity at 8 % IACS, better than 55% of steel grades.
Chemical & Environmental3
Corrosion resistance is not recommended (10/100), worse than 86% of steel grades.
Sustainability4
Producing a kilogram of 1335-HR takes about 30 MJ of energy and emits 2.2 kg of CO₂ — more than 56% of steel grades. Typical recycled content is 30%.
Manufacturability8
1335-HR's machinability is fair (53/100, better than 53% of steel grades); weldability fair (40/100); formability fair (35/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with 1335-HR
Is 1335 easy to machine?
Machines best annealed or normalized (~190–235 HB) at roughly 60 % of 1212 speed; above 35 HRC use coated carbide, rigid setups and reduced feeds.
Can 1335 be welded?
Carbon equivalent ~0.65–0.70, so preheat 200–300 °C, use low-hydrogen consumables and temper after welding; avoid welding in the fully hardened state.
Can 1335 be formed, bent or molded?
Hot forge 1100–1200 °C and normalize afterwards; cold bending is limited — anneal first and allow generous bend radii.
What surface finishes work on 1335?
No inherent corrosion resistance: specify phosphate + oil, black oxide, zinc or hard-chrome plating; bake after plating to avoid hydrogen embrittlement above ~1000 MPa.
1335 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 | 0.33 – 0.38 | 0.36 |
| Mnprimary alloying addition for hardenability | 1.6 – 1.9 | 1.75 |
| Sideoxidizer; not required for some product forms | 0.15 – 0.35 | 0.25 |
| P | ≤ 0.04 | — |
| S | ≤ 0.04 | — |
| Fe | balance | — |
1335-HR — frequently asked
What is 1335-HR used for?
1335-HR is typically used for shafts, forgings, medium-strength fasteners and gears. In short: mn-only alloy hardenability; cheaper than 4140; weldable with preheat.
What is the yield strength of 1335-HR?
1335-HR has a typical yield strength of 415 MPa (60.2 ksi) and a tensile strength of 690 MPa (100 ksi) — weaker than 56% of steel grades. Strength varies by condition: see the 12 listed tempers.
Is 1335-HR easy to machine?
Reasonably — machinability is rated fair (53/100, better than 53% of steel grades). Machines best annealed or normalized (~190–235 HB) at roughly 60 % of 1212 speed; above 35 HRC use coated carbide, rigid setups and reduced feeds.
Can 1335-HR be welded?
With care — weldability is rated fair (40/100). Carbon equivalent ~0.65–0.70, so preheat 200–300 °C, use low-hydrogen consumables and temper after welding; avoid welding in the fully hardened state.
What surface finishes work on 1335-HR?
No inherent corrosion resistance: specify phosphate + oil, black oxide, zinc or hard-chrome plating; bake after plating to avoid hydrogen embrittlement above ~1000 MPa.
Can 1335-HR be formed, bent or molded?
Hot forge 1100–1200 °C and normalize afterwards; cold bending is limited — anneal first and allow generous bend radii.
What is the maximum service temperature of 1335-HR?
1335-HR 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.
What is the difference between 1335-N and 1335-QT205?
N is the default condition — standard stock condition for medium-strength shafts and forgings needing uniform structure and good toughness without Q&T. QT205: maximum hardness and strength for wear parts; low ductility and notch sensitivity, rarely used on large sections. Yield strength is 540 MPa in N versus 1,450 MPa in QT205.
Sources
- SAE J404 — Chemical Compositions of SAE Alloy Steels — SAE International (2021)
- ASTM A29/A29M — Steel Bars, Carbon and Alloy, Hot-Wrought — ASTM (2020)
- ASM Handbook Vol.1 — Properties and Selection: Irons, Steels, and High-Performance Alloys — ASM International (1990)
- ASM Handbook Vol.4 — Heat Treating — ASM International (1991)
- GB/T 3077 (35Mn2 comparable grade) — SAC (2015)
- Mysteel / SMM (2025)
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.