Nickel alloy forgings, technical datasheet

NiCr16Al Forgings: Rolled Rings, Flanges, Shafts, Discs and Bars

NiCr16Al is a nickel-based alloy with about 16% chromium and an aluminium addition, used for parts that must carry load and resist oxidation at high temperature. Jiangyin Jiangnan Metal Co., Ltd. is an open-die forging factory in Jiangyin, Jiangsu Province, China. We forge NiCr16Al into seamless rolled rings, flanges, shafts, discs, sleeves, bushings, tube sheets and round bars, to drawing, from single pieces to production quantities.

Published by Jiangyin Jiangnan Metal Co., Ltd., open-die forging factory, Jiangyin, Jiangsu, China
Last reviewed 22 August 2026. Technical enquiries: sales@steelforgepieces.com

What is NiCr16Al?

NiCr16Al is a nickel-chromium alloy with aluminium added as an alloying element. The name follows the German DIN short-name system. The base metal is given first (Ni). The main alloying element carries its nominal percentage (Cr16, meaning about 16% chromium). A further element named without a number (Al) is present in a smaller controlled amount.

Chromium in a nickel alloy forms a chromia (Cr₂O₃) surface layer that protects the metal beneath it. Aluminium allows the alloy to form an alumina (Al₂O₃) layer instead. Alumina is more stable at high temperature, grows more slowly, and adheres better to the substrate. This is the purpose of the aluminium addition, and it gives NiCr16Al better oxidation resistance than a plain solid-solution nickel-chromium grade.

NiCr16Al is a DIN short name. It is not a UNS number or an ASTM grade designation. If your specification, drawing or client approval calls out a UNS number, a Werkstoff number or an ASTM or ASME grade, state it on the enquiry. We will confirm the equivalence in writing before any material is melted.

Chemical composition of NiCr16Al

NiCr16Al is nickel-based. Chromium is nominally 16% and aluminium is present as a controlled addition. The ranges that apply to an individual order are set by the specification named on the purchase order, and the analysis of each heat is reported on the mill certificate.

Full controlled ranges for every element can be issued on request before order placement, together with a sample mill certificate.

Mechanical properties of NiCr16Al

Typical room-temperature properties for NiCr16Al in the heat-treated condition are a tensile strength of about 1215 MPa (176,200 psi), a 0.2% proof strength of about 1025 MPa (148,700 psi), and elongation at break of 12.9%. Values are given in both metric and imperial units.

These are indicative values for material selection and are not acceptance criteria. Strength and hardness fall as section thickness increases, because the cooling rate at the core of a heavy forging is slower than in a test coupon. The governing values for an order are those measured on test specimens taken from the delivered heat, in the delivered condition, at the sampling position required by the specification, and reported on the certificate.

NiCr16Al forged product forms

Jiangyin Jiangnan Metal forges NiCr16Al into the forms listed below. Each is open-die forged or ring rolled to shape from a solid ingot, so grain flow follows the contour of the part.

Send the required outside diameter, height or length, wall thickness and finished weight with the enquiry, and we will confirm whether the part falls within our forging and ring rolling range before quoting.

Delivery condition

NiCr16Al forgings are supplied rough machined with an agreed machining allowance, or finish machined to drawing. State on the enquiry which is required, together with the heat-treated condition and the surface condition. Mark the machining allowance and the test specimen location on the drawing.

How NiCr16Al forgings are produced

Melting

NiCr16Al is melted in an electric arc furnace with vacuum oxygen decarburisation, then remelted by electroslag remelting. The ESR stage refines the solidification structure, reduces segregation and lowers non-metallic inclusion content. That level of cleanliness is required for heavy forged sections to meet ultrasonic acceptance criteria.

Open-die forging and ring rolling

The ingot is upset and drawn under an open-die press to reach the forging reduction required by the specification. It is then forged to shape, or pierced and rolled on a ring mill for seamless rings. Working the metal in this way produces continuous grain flow along the contour of the part, unlike a component machined from solid stock.

Heat treatment

Solution treatment and ageing are carried out to the specification and to the delivery condition agreed for the order. Furnace temperature is controlled and recorded on calibrated equipment, and charts are retained and reported.

Non-destructive testing

Every NiCr16Al forging is ultrasonically tested to EN 10228-3, SEP 1921 or ASTM A388, to the acceptance class stated on the order. Dye penetrant testing to ASTM E165 and magnetic particle testing are added where the specification requires surface examination.

Certification

Material is released against EN 10204 3.1, or EN 10204 3.2 counter-signed by a third-party inspection body such as TUV, SGS, BV or Lloyd's Register. The certificate carries the chemical analysis, mechanical test results, heat treatment records, NDT results and heat traceability.

Applications for NiCr16Al forgings

NiCr16Al is specified where temperature, an oxidising environment and mechanical load occur together. These are the sectors it is forged for:

• PumpsRolled rings and shafts for chemical pumps and plunger pumps.
• Pressure vessels and heat exchangersShafts, forged tubes, tube sheets and flanges for pressure vessels, air receivers and shell-and-tube heat exchangers.
• Columns and towersShafts, flanges, forged rings and pipe for columns, towers, tanks, silos, process modules and preheaters.
• Oil and gasBushings, sleeves, discs and blocks for subsea and deepwater production systems, wellheads and Christmas trees.
• Compressors and power generationForgings for industrial air compressors, power generators and nitrogen generators.
• ValvesValve stems, seat rings, blocks and bodies for ball, check, globe, gate and plug valves and strainers.
• Power transmissionRings, spindles, bars and gear blanks for turbines, gas compressors and gearboxes.
• Cement, sugar and mineral processingForged pieces, nozzles and crankshafts for cement mills, sugar mills, concrete mills and mixers.
• Marine and heavy machineryForged wheels, manifolds and rolls for shipbuilding, pulp and paper, pharmaceutical and biochemical plant.

NiCr16Al compared with other nickel alloys

Nickel alloys differ mainly in how they are strengthened and which oxide they form. The table sets NiCr16Al against three grades it is often considered alongside.

If the grade is not yet fixed, send the service conditions instead of a grade name: operating temperature, pressure, medium, whether duty is cyclic or steady, and the code the equipment is built to. We forge Inconel 600, Inconel 625, Nimonic 80A, Incoloy 800H and Hastelloy C-276 on the same equipment.

Standards and specifications

Where a project specification names a grade or a cross-reference not listed here, send the specification. We will either confirm the match in writing or state that it is not a match.

About the manufacturer

Jiangyin Jiangnan Metal Co., Ltd. is an open-die forging factory at No.1 Chengxiqiao Road, Zhouzhuang Town, Jiangyin City, Jiangsu Province, China. We forge rings, seamless rolled rings, flanges, shafts, discs, sleeves and bars in carbon steel, alloy steel, tool steel, stainless steel and nickel-based alloys, working to customer drawings and shipping worldwide.

Frequently asked questions about NiCr16Al

Related nickel alloy forgings

Other grades forged into rings, flanges, bars and discs on the same equipment:

• Inconel 625
• Inconel 600
• Inconel 601
• Inconel 718
• Inconel X-750
• Incoloy 800H
• Incoloy 825
• Incoloy A-286
• Nimonic 80A
• Nimonic 90
• Nimonic 263
• Hastelloy C-276
• Hastelloy C-22
• Monel 400
• Monel K-500
• Waspaloy
• Haynes 230
• AISI 330