Metalsin Tech supplies ASTM A217 castings in the product form of valves, flanges, fittings and other pressure-containing parts. ASTM A217/A217M covers one grade of martensitic stainless steel and nine grades of ferritic alloy steel which are primarily utilized in high-temperature and corrosive service. It includes C-Mo alloy steel: Grade WC1; Ni-Cr-Mo alloy steel: Grade WC4, WC5; Cr-Mo alloy steel: Grade WC6, WC9, WC11, C5, C12; Cr-Mo-V alloy steel: Grade C12A; and Chromium Steel: Grade CA15.

1. Chemical Composition Requirements

Chemical Composition of ASTM A217 Castings, %
Grade	UNS	C	Mn	P	S	Si	Cr	Mo	Others
WC1	J12524	≤0.25	0.50-0.80	≤0.04	≤0.045	≤0.60	-	0.45-0.65	*A
WC4	J12082	0.05-0.20	0.50-0.80	≤0.04	≤0.045	≤0.60	0.50-0.80	0.45-0.65	*B
WC5	J22000	0.05-0.20	0.40-0.70	≤0.04	≤0.045	≤0.60	0.50-0.90	0.90-1.20	*C
WC6	J12072	0.05-0.20	0.50-0.80	≤0.035	≤0.035	≤0.60	1.00-1.50	0.45-0.65	*D
WC9	J21890	0.05-0.18	0.40-0.70	≤0.035	≤0.035	≤0.60	2.00-2.75	0.90-1.20	*E
WC11	J11872	0.15-0.21	0.50-0.80	≤0.020	≤0.015	0.30-0.60	1.00-1.50	0.45-0.65	*F
C5	J42045	≤0.20	0.40-0.70	≤0.04	≤0.045	≤0.75	4.00-6.50	0.45-0.65	*G
C12	J82090	≤0.20	0.35-0.65	≤0.035	≤0.035	≤1.00	8.00-10.00	0.90-1.20	*H
C12A	J84090	0.08-0.12	0.30-0.60	≤0.025	≤0.010	0.20-0.50	8.0-9.5	0.85-1.05	*H
CA15	J91150	≤0.15	≤1.00	≤0.040	≤0.025	≤1.50	11.5-14.0	≤0.50	*I

*All values are maximum unless otherwise specified.
*A – Total Residual{Cu:≤0.50,Ni:≤0.50,Cr≤0.35,W≤0.10}:≤1.00. *B – Ni:0.70-1.10,Total Residual{Cu:≤0.50,W≤0.10}:≤0.60.
*C – Ni:0.60-1.00,Total Residual{Cu:≤0.50,W≤0.10}:≤0.60. *D – Total Residual{Cu:≤0.50,Ni:≤0.50,W≤0.10}:≤1.00.
*E – Total Residual{Cu:≤0.50,Ni:≤0.50,W≤0.10}:≤1.00. *F – Total Residual{Al:≤0.01,Cu:≤0.35,Ni:≤0.50,V≤0.03}:≤1.00.
*G – Total Residual{Cu:≤0.50,Ni:≤0.50,W≤0.10}:≤1.00. *H – Total Residual{Cu:≤0.50,Ni:≤0.50,W≤0.10}:≤1.00.
*I – Ni:≤0.40,Co:0.06-0.10,N:0.03-0.07,V:0.18-0.25,Total Residual{Al:≤0.02,Ti≤0.01,Zr≤0.01}. *J – Ni:≤1.00.
*Values from *A to *J shall be furnished with the unit “%”.

2. Mechanical Properties

Mechanical Properties of ASTM A217 Castings
Grade	Tensile Strength, ksi[MPa]	Yield Strength, min. ksi[MPa]	Elongation in 2", min. %	Reduction of Area, min. %
WC1	65[450]-90[620]	35[240]	24	35
WC4	70[485]-95[655]	40[275]	20	35
WC5	70[485]-95[655]	40[275]	20	35
WC6	70[485]-95[655]	40[275]	20	35
WC9	70[485]-95[655]	40[275]	20	35
WC11	80[550]-105[725]	50[345]	18	45
C5	90[620]-115[795]	60[415]	18	35
C12	90[620]-115[795]	60[415]	18	35
C12A	85[585]-110[760]	60[415]	18	45
CA15	90[620]-115[795]	60[415]	18	30

3. Heat Treatment

1. All castings shall receive a heat treatment proper to their design and chemical composition.
2. ASTM A217 castings shall be furnished in the normalized and tempered conditions; Grades WC1, WC4, WC5, WC6, and CA15 shall be tempered at 1100°F [595°C] min; Grades WC9, C5, C12, and WC11 shall be tempered at 1250°F [675°C] min; Grade C12A shall be thermally treated, either by normalizingand-tempering or by accelerated cooling from the austenitizing temperature by air blasting or liquid quenching, followed by tempering. C12A castings shall be austenitized at 1900-1975°F [1040-1080°C] and tempered at 1350-1470°F [730-800°C].
3. Heat treatment shall be performed after castings have been allowed to cool below the transformation range.

4. Quality Control

1. The surface of ASTM A217 castings (either valve, flange, fittings or other piping component) shall be visually examined and shall be free of sand, scale, cracks, and hot tears.
2. Hollow castings of Grade C12A, larger than NPS 4 [DN 100], and whose internal surfaces are not accessible to the visual examination above-mentioned, shall be examined by the ultrasonic examination prescribed in Supplementary Requirement S7.

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