Steel A217 WC9 FA+T
Heat-treated state
ASTM A217 WC9 · EN 1.7379, G17CrMo9-10
FA+T = fully annealed and tempered
Pick full annealing plus tempering when lowest hardness (150 HB), best machinability and maximum dimensional stability matter; strength sits at the specification floor of 295 MPa yield.
Values for the FA+T condition
Other A217 WC9 tempers and conditions
A217 WC9 is listed in 4 conditions; see the grade overview at A217 WC9.
Compare all 4 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
FA+TThis page Fully annealed and tempered | Pick full annealing plus tempering when lowest hardness (150 HB), best machinability and maximum dimensional stability matter; strength sits at the specification floor of 295 MPa yield. | 295 | 505 | 27 | 150 HB | 7.2 % IACS |
N+T + simulated PWHT | Use these softened post-weld values (300 MPa yield, 520 MPa tensile, 160 HB) for welded assemblies and castings that will see repeated post-weld heat treatment cycles. | 300 | 520 | 25 | 160 HB | 7.2 % IACS |
N+TDefault Normalized and tempered | Standard supply condition, normalized and tempered at 675 °C or above: pick for routine high-temperature pressure castings such as valve bodies, pump casings and fittings up to 565 °C. | 320 | 550 | 24 | 170 HB | 7.2 % IACS |
Quenched and tempered | Choose liquid quenching plus tempering at 675 °C or above for heavy sections or where higher and more uniform strength and toughness are needed, at 380 MPa yield and slightly lower machinability. | 380 | 585 | 22 | 185 HB | 7 % IACS |
What is A217 WC9 FA+T?
A217 WC9 FA+T is A217 WC9 heat treated to FA+T — pick full annealing plus tempering when lowest hardness (150 HB), best machinability and maximum dimensional stability matter; strength sits at the specification floor of 295 MPa yield. A217 WC9 FA+T has a yield strength of 295 MPa (42.8 ksi) and a tensile strength of 505 MPa (73.2 ksi) — weaker than 87% of steel grades. Elongation at break is 27% and the elastic modulus is 210 GPa (30.5 Msi). A217 WC9 FA+T has a density of 7.85 g/cm³ (0.284 lb/in³), heavier than 56% of steel grades. It melts at 1,450°C (2,642 °F). N+T is the default condition FabDigit quotes; FA+T is available on request or by drawing note.
Advantages
- High service temperature — 565°C (1,049 °F), better than 96% of steel grades
- Tough — resists crack growth — 130 MPa·√m (118.3 ksi·√in), better than 89% of steel grades
- Ductile — tolerates forming and impact — 27%, better than 86% of steel grades
Limitations
- Low strength — 295 MPa (42.8 ksi), worse than 87% of steel grades
A217 WC9 FA+T properties
Typical room-temperature values for A217 WC9 FA+T; 22 are specific to this condition. Other listed values are A217 WC9 reference data and may not represent this condition. Bars are the position among steel grades.
Physical3
A217 WC9 FA+T has a density of 7.85 g/cm³ (0.284 lb/in³), heavier than 56% of steel grades. It melts at 1,450°C (2,642 °F).
Mechanical16
A217 WC9 FA+T has a yield strength of 295 MPa (42.8 ksi) and a tensile strength of 505 MPa (73.2 ksi) — weaker than 87% of steel grades. Elongation at break is 27% and the elastic modulus is 210 GPa (30.5 Msi).
Thermal6
A217 WC9 FA+T is rated for continuous service to 565°C (1,049 °F). It conducts heat at 36 W/m·K (20.8 BTU/hr·ft·°F), worse than 73% of steel grades. Thermal expansion is 12.3 µm/m·K (6.83 µin/in·°F).
Electrical3
A217 WC9 FA+T conducts electricity at 7.2 % IACS, worse than 71% of steel grades.
Chemical & Environmental3
Corrosion resistance is poor (20/100), better than 87% of steel grades.
Sustainability4
Producing a kilogram of A217 WC9 FA+T takes about 27 MJ of energy and emits 2.3 kg of CO₂ — less than 59% of steel grades. Typical recycled content is 75%.
Manufacturability7
A217 WC9 FA+T's machinability is good (55/100, better than 62% of steel grades); weldability good (55/100); formability poor (25/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with A217 WC9 FA+T
Is A217 WC9 easy to machine?
In the normalized and tempered condition at about 170 HB machinability is moderate, roughly 55 % of AISI 1212 (score 50). Use coated carbide at moderate speed with heavier feed, and expect faster tool wear where cast skin or entrapped sand remains.
Can A217 WC9 be welded?
Weldable with 200–250 °C preheat and maintained interpass temperature, using B3-class 2.25Cr-1Mo filler such as E9015-B3 or ER90S-B3. Follow with 690–750 °C PWHT for hydrogen removal and stress relief.
Can A217 WC9 be formed, bent or molded?
Produced as sand or resin-sand castings; solidification shrinkage is large, so plan adequate risering and progressive solidification. Finished castings are not cold formed, and any hot straightening must be followed by re-heat-treatment.
What surface finishes work on A217 WC9?
Not resistant to atmospheric corrosion — blast, then apply a high-temperature heat-resistant coating or an aluminizing/pack-aluminide treatment. Seating faces are usually hardfaced with a hard alloy or stainless weld overlay; anodizing does not apply.
A217 WC9 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 | 0.05 – 0.18 | 0.13 |
| Si | ≤ 0.6 | 0.35 |
| Mn | 0.4 – 0.7 | 0.55 |
| P | ≤ 0.04 | 0.02 |
| S | ≤ 0.05 | 0.02 |
| Cr | 2 – 2.75 | 2.3 |
| Mo | 0.9 – 1.2 | 1.05 |
| Niresidual element limit | ≤ 0.5 | — |
| Curesidual element limit | ≤ 0.5 | — |
| Wresidual element limit | ≤ 0.1 | — |
| Vresidual element limit | ≤ 0.03 | — |
| Fe | balance | — |
A217 WC9 FA+T — frequently asked
What is A217 WC9 FA+T used for?
A217 WC9 FA+T is typically used for high-temperature valve and pump bodies, hydroprocessing unit castings, steam piping components and pressure vessel fittings. In short: hotter service than WC6; hydrogen-attack resistant casting; 565 °C rating.
What is the yield strength of A217 WC9 FA+T?
A217 WC9 FA+T has a typical yield strength of 295 MPa (42.8 ksi) and a tensile strength of 505 MPa (73.2 ksi) — weaker than 87% of steel grades. Strength varies by condition: see the 4 listed tempers.
Is A217 WC9 FA+T easy to machine?
Reasonably — machinability is rated good (55/100, better than 62% of steel grades). In the normalized and tempered condition at about 170 HB machinability is moderate, roughly 55 % of AISI 1212 (score 50). Use coated carbide at moderate speed with heavier feed, and expect faster tool wear where cast skin or entrapped sand remains.
Can A217 WC9 FA+T be welded?
Yes — weldability is rated good (55/100). Weldable with 200–250 °C preheat and maintained interpass temperature, using B3-class 2.25Cr-1Mo filler such as E9015-B3 or ER90S-B3. Follow with 690–750 °C PWHT for hydrogen removal and stress relief.
What surface finishes work on A217 WC9 FA+T?
Not resistant to atmospheric corrosion — blast, then apply a high-temperature heat-resistant coating or an aluminizing/pack-aluminide treatment. Seating faces are usually hardfaced with a hard alloy or stainless weld overlay; anodizing does not apply.
Can A217 WC9 FA+T be formed, bent or molded?
Produced as sand or resin-sand castings; solidification shrinkage is large, so plan adequate risering and progressive solidification. Finished castings are not cold formed, and any hot straightening must be followed by re-heat-treatment.
What is the maximum service temperature of A217 WC9 FA+T?
A217 WC9 FA+T is rated for continuous use to about 565°C (1,049 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
Sources
- ASTM A217/A217M — Steel Castings, Martensitic Stainless and Alloy, for Pressure-Containing Parts, Suitable for High-Temperature Service — ASTM International (2021)
- EN 10213 — Steel castings for pressure purposes (G17CrMo9-10, 1.7379) — CEN (2016)
- ASME BPVC Section II Part D — Properties (Metric): 2.25Cr-1Mo materials — ASME (2023)
- ASM Handbook Vol.1 — Properties and Selection: Irons, Steels, and High-Performance Alloys — ASM International (1990)
- API RP 941 — Steels for Hydrogen Service at Elevated Temperatures (Nelson curves) — API (2016)
- NACE MR0175 / ISO 15156 — Materials for use in H2S-containing environments — NACE/ISO (2015)
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.