Stainless Steel S42035
UNS S42035
S42035 is a 13 % Cr modified 4xx-series stainless with a balanced composition, supplied annealed, hot-rolled, cold-drawn, normalized-and-stress-relieved or in quench-and-temper conditions from QT205 to QT650.
Reference datasheet — S42035 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 A condition
S42035 tempers and conditions
S42035 is supplied in 8 conditions, soft to hard. A 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 |
|---|---|---|---|---|---|---|
ADefault Solution annealed | Standard stock condition for machining and forming before hardening. | 380 | 690 | 22 | 215 HB | — |
Hot rolled | Black bar or forging as supplied from the mill; must be annealed before serious machining. | 600 | 900 | 14 | 29 HRC | 3 % IACS |
Cold drawn | Bright cold-drawn bar for close tolerance turned parts and shafts that stay unhardened. | 650 | 830 | 13 | 25 HRC | — |
Hardened, tempered 650 °C | Lowest-hardness Q&T condition, chosen when a hardness cap (e.g. ≤28 HRC) and maximum ductility are specified. | 690 | 860 | 19 | 26 HRC | — |
Hardened, tempered 595 °C | Toughness-oriented condition for valve stems, pump shafts and fasteners where impact matters more than hardness. | 830 | 1,030 | 16 | 33 HRC | — |
Hardened, tempered 315 °C | Slightly tougher than the 205 °C temper while keeping high wear resistance. | 1,330 | 1,570 | 10 | 46 HRC | — |
Hardened ~1010 °C, oil/air quenched, tempered 205 °C | Maximum hardness and wear resistance for valve trim, seats and cutting edges. | 1,450 | 1,720 | 8 | 50 HRC | — |
Hardened and stress relieved | Peak hardness for thin wear parts and blades where dimensional stability, not toughness, governs. | 1,500 | 1,850 | 4 | 53 HRC | — |
What is S42035?
S42035 is a 13 % Cr modified 4xx-series stainless with a balanced composition, supplied annealed, hot-rolled, cold-drawn, normalized-and-stress-relieved or in quench-and-temper conditions from QT205 to QT650. In the default condition it gives 380 MPa yield, 690 MPa tensile, 22 % elongation and 215 HB (96 HRB) with service to 650 °C, and its machinability rating of 48 makes it practical for valve trim, shafts and pump hardware. Corrosion resistance is moderate (38) and suited to mild aqueous, steam and hydrocarbon duty. Weldability is poor (30) and requires preheat plus post-weld temper; where welding dominates, use a stabilized ferritic such as 439. S42035 has a density of 7.7 g/cm³ (0.278 lb/in³), lighter than 83% of stainless steel grades. It melts at 1,454°C (2,649 °F). S42035 has a yield strength of 380 MPa (55.1 ksi) and a tensile strength of 690 MPa (100 ksi) — stronger than 52% of stainless steel grades. Elongation at break is 22% and the elastic modulus is 200 GPa (29 Msi).
What is S42035 used for?
- valve trim
- pump shafts
- general corrosion-resistant hardware
Advantages
- High electrical conductivity — 3.1 % IACS, better than 99% of stainless steel grades
- Low embodied carbon — 3.4 kg CO₂/kg, better than 91% of stainless steel grades
- Easy to machine — 48/100, better than 88% of stainless steel grades
- Conducts heat well — 24.9 W/m·K (14.4 BTU/hr·ft·°F), better than 87% of stainless steel grades
Limitations
- Needs corrosion protection — 38/100, worse than 95% of stainless steel grades
- Difficult to weld — 30/100, worse than 88% of stainless steel grades
- Limited ductility — 22%, worse than 75% of stainless steel grades
S42035 properties
Typical room-temperature values for S42035-A; bars are the position among stainless steel grades.
Physical3
S42035 has a density of 7.7 g/cm³ (0.278 lb/in³), lighter than 83% of stainless steel grades. It melts at 1,454°C (2,649 °F).
Mechanical15
S42035 has a yield strength of 380 MPa (55.1 ksi) and a tensile strength of 690 MPa (100 ksi) — stronger than 52% of stainless steel grades. Elongation at break is 22% and the elastic modulus is 200 GPa (29 Msi).
Thermal6
S42035 is rated for continuous service to 650°C (1,202 °F). It conducts heat at 24.9 W/m·K (14.4 BTU/hr·ft·°F), better than 87% of stainless steel grades. Thermal expansion is 10.3 µm/m·K (5.72 µin/in·°F).
Electrical3
S42035 conducts electricity at 3.1 % IACS, better than 99% of stainless steel grades.
Chemical & Environmental3
Corrosion resistance is fair (38/100), worse than 95% of stainless steel grades.
Sustainability4
Producing a kilogram of S42035 takes about 48 MJ of energy and emits 3.4 kg of CO₂ — less than 85% of stainless steel grades. Typical recycled content is 60%.
Manufacturability7
S42035's machinability is fair (48/100, better than 88% of stainless steel grades); weldability poor (30/100); formability fair (38/100).
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 stainless steel family
Yield strength against density for every stainless steel grade FabDigit runs. S42035 is highlighted; hover a dot for its name, or open the interactive family chart.
Working with S42035
Is S42035 easy to machine?
Machine in the annealed condition with rigid setups, sharp positive-rake carbide and generous coolant; the alloy work-hardens and produces stringy chips, so keep feed constant and avoid dwelling.
Can S42035 be welded?
Weldable only with 200–315 °C preheat, matching 410/420 or austenitic 309/316 filler, and immediate post-weld temper at 700–760 °C; otherwise the HAZ cracks from untempered martensite.
Can S42035 be formed, bent or molded?
Cold forming is limited to gentle bends in the annealed state (bend radius ≥2t); hot work at 1100–1200 °C and slow-cool or anneal immediately after forging.
S42035 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 |
|---|---|---|
| Cmodified 420 carbon band; sets attainable hardness | 0.25 – 0.4 | 0.32 |
| Cr | 12 – 14 | 13 |
| Mn | ≤ 1 | 0.5 |
| Si | ≤ 1 | 0.4 |
| Nioptional addition for hardenability/toughness | ≤ 0.75 | 0.3 |
| Mooptional; improves temper resistance and pitting | ≤ 0.6 | 0.25 |
| P | ≤ 0.04 | |
| Scontrolled sulfur to aid machinability | ≤ 0.03 | 0.02 |
| N | ≤ 0.06 | |
| Fe | balance |
What surface finishes work on S42035?
Passivate per ASTM A967 (citric or nitric) after machining; can be mirror polished, hard chrome plated, nitrided or black oxided — do not use processes that exceed the tempering temperature.
Surface treatments FabDigit runs on stainless 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).
Passivation
Organic Coating
Thermal Spray
How much does S42035 cost?
S42035 is a standard-cost stainless 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.
S42035 — frequently asked
What is S42035 used for?
S42035 is typically used for valve trim, pump shafts and general corrosion-resistant hardware. In short: hardenable 13% Cr grade; machines better than austenitics; poor weldability without preheat.
What is the yield strength of S42035?
S42035 has a typical yield strength of 380 MPa (55.1 ksi) and a tensile strength of 690 MPa (100 ksi) — stronger than 52% of stainless steel grades. Strength varies by condition: see the 8 listed tempers.
Is S42035 easy to machine?
Reasonably — machinability is rated fair (48/100, better than 88% of stainless steel grades). Machine in the annealed condition with rigid setups, sharp positive-rake carbide and generous coolant; the alloy work-hardens and produces stringy chips, so keep feed constant and avoid dwelling.
Can S42035 be welded?
Not readily — weldability is rated poor (30/100). Weldable only with 200–315 °C preheat, matching 410/420 or austenitic 309/316 filler, and immediate post-weld temper at 700–760 °C; otherwise the HAZ cracks from untempered martensite.
What surface finishes work on S42035?
Passivate per ASTM A967 (citric or nitric) after machining; can be mirror polished, hard chrome plated, nitrided or black oxided — do not use processes that exceed the tempering temperature.
Can S42035 be formed, bent or molded?
Cold forming is limited to gentle bends in the annealed state (bend radius ≥2t); hot work at 1100–1200 °C and slow-cool or anneal immediately after forging.
What is the maximum service temperature of S42035?
S42035 is rated for continuous use to about 650°C (1,202 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
What is the difference between S42035-A and S42035-QT205?
A is the default condition — standard stock condition for machining and forming before hardening. QT205: maximum hardness and wear resistance for valve trim, seats and cutting edges. Yield strength is 380 MPa in A versus 1,450 MPa in QT205.
How much does S42035 cost?
S42035 is a standard-cost stainless 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.
Sources
- ASTM A276/A276M — Stainless Steel Bars and Shapes — ASTM International (2023)
- ASTM A582/A582M — Free-Machining Stainless Steel Bars — ASTM International (2021)
- ASTM A959 — Harmonized Standard Grade Compositions for Wrought Stainless Steels — ASTM International (2022)
- ASM Specialty Handbook: Stainless Steels — ASM International (1994)
- ASM Handbook Vol.1 — Properties and Selection: Irons, Steels and High-Performance Alloys — ASM International (1990)
- GB/T 1220 (2007)
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.