Hitachi Metals : Applying Metal Additive Manufacturing Material ADMUSTER® C21P (High Corrosion-Resistant Nickel-Based Alloy) to Mass Production(PDF：)

Metal additive manufacturing

material ADMUSTER®

ＮＥＷＳ ＲＥＬＥＡＳＥ

October 3, 2022

Hitachi Metals, Ltd.

Applying Metal Additive Manufacturing Material ADMUSTER® C21P (High

Corrosion-ResistantNickel-Based Alloy) to Mass Production

Contributing to metal additive manufacturing products with 100 times or more the corrosion

resistance of SUS316L,a stainless steel

Hitachi Metals, Ltd. ("Hitachi Metals") has been developing its ADMUSTER® series of metal additive manufacturing materials able to achieve high corrosion resistance and high strength for attention-getting metal additive manufacturing (metal 3D printing) that enables the creation of complex shapes, and has been expanding into various fields where the characteristics come into play. In particular, nickel-based alloy ADMUSTER® C21P in the ADMUSTER® series enables the creation of metal additive manufacturing products with 100 times or more*1 the corrosion resistance of SUS316L, a stainless steel. This higher reliability leads to the reduction of operation halt risks and lower frequency of part exchange as well as shorter part production lead times and the reduction of CO2 in fields that require high corrosion resistance, such as semiconductor manufacturing equipment; drug intermediate production; oil, gas, and other energy facilities; and chemical plants. As such, customer expectations for additive manufacturing are rising, and customers have started applying additive manufacturing to mass production.

1. Background

Additive manufacturing (3D printing), which will eliminate dies and assembly and enable the low- cost manufacture of complex-shaped products, is gaining the spotlight as a technique that is transforming conventional manufacturing. In addition, as of recently, it is being used for emergency alternative production in the event of supply chain disruptions caused by the COVID-19 pandemic and geopolitical risks, as well as a CO2 reduction measure. While attention is growing, we not only use existing materials, such as stainless steel, nickel-based alloy, and aluminum alloy, but are also actively developing new materials by taking advantage of additive manufacturing.

We have been developing additive manufacturing-specific materials mainly at the Global Research & Innovative Technology center (GRIT), a Hitachi Metals corporate research laboratory. Having rolled out the ADMUSTER® series of metal additive manufacturing materials, which includes those with high corrosion resistance and high strength, we are proposing the most appropriate material for each field where these characteristics are required.

2. Outline

Designed for additive manufacturing, ADMUSTER® C21P with high corrosion resistance is a powder material based on MAT21®, a nickel- based alloy with high corrosion resistance for wrought product, developed at Hitachi Metals' Okegawa Works. It currently has one of the highest PRE*2 numbers of all our metal additive manufacturing materials. Additive-manufactured products made from ADMUSTER® C21P have been confirmed to have the same corrosion resistance as MAT21® wrought material*3 along with excellent strength and hardness (see Tables 1 and 2). Test results show that compared to SUS316L, a stainless steel with relatively high corrosion resistance, as-built C21P (a

just additive-manufactured test specimen) has one hundredth or less the corrosion speed (100 times or more the corrosion resistance).

Since chemical plants and semiconductor manufacturing plants use highly corrosive fluid, the corrosion resistance of the parts used for the equipment is important. Using parts with higher corrosion resistance makes it possible to improve reliability, resulting in reduced operation halt risk and lower frequency of part exchange. Furthermore, additive manufacturing eliminates die preparation and assembly processes and shortens the lead time for small lot production. Since these characteristics not only enable lower costs but also lead to the reduction of CO2 generated in the part production processes, customer expectations are rising, and customers have already started mass production of metal additive manufacturing parts made of ADMUSTER® C21P.

Corporate Communications Dept.
Toyosu Prime Square, 5-6-36 Toyosu, Koto-ku, Tokyo 135-0061, Japan	https://www.hitachi-metals.co.jp/

Hitachi Metals will contribute to the solution of customer issues and CO2 reduction by strengthening and expanding the lineup of the ADMUSTER® series into various fields requiring heat resistance, wear resistance, corrosion resistance, and high functionality.

Table 1. Comparison of corrosion speeds of ADMUSTER® C21P additive manufacturing material and various forging and rolling materials in various acid aqueous solutions*4

					(mm/year, test time: 24 hours)
	C21P	C21P		C21P	MAT21®	Alloy C-22	SUS316L
	as built	solution-		aging-	wrought	wrought	wrought
		treated		treated *5
PRE*2			82		70	26
1% HCl boiling	0.01	-		-	0.01	0.13	24
2% HCl boiling	0.01	0.01		0.01	0.05	1.72	51.2
5% HCl boiling	1.6	-		-	1.15	7.95	199.3
30% HF room temp.	0.06	-		-	0.08	-	-
10% H2SO4 boiling	0.03	0.03		0.02	0.04	0.23	69.4

Table 2: Mechanical properties of ADMUSTER® C21P additive manufacturing material and various forging and rolling materials*4

Item	C21P	C21P	C21P	MAT21®
	as built	solution-	aging-	wrought
		treated	treated*5
0.2% proof stress,	623-758	416-424	952	381
MPa
Tensile strength,	885-1030	890-905	1440	812
MPa
Hardness, HV10	288-323	206-209	428	180-200

*1) Our internal test data

*2) PRE: Pitting Resistance Equivalent number, an index of corrosion resistance. PRE = Cr + 3.3 (Mo + W/2) + 16N

*3) MAT21® forging and rolling material: Forged or rolled material made of high corrosion-resistantnickel-based alloy MAT21®

*4) The values are representative and not guaranteed.

*5) Aging treatment (Temp.; about 600℃, Duration; >30hour)

[Contact for customers] AM Solution Center, Advanced Metals Division, Hitachi Metals, Ltd. Adachi, e-mail:[e-mail]

[Contact for press] Corporate Communications Dept., Hitachi Metals, Ltd. Minami, e-mail:[e-mail]

Reference

Main Products in the ADMUSTER® Series of Metal Additive Manufacturing Materials

Corrosion Resistant Materials

High Corrosion Resistant and

High Corrosion Resistant

Hard Particle Dispersion

Strengthened Chromium-

High Strength Alloy:

Nickel-Based Alloy:

Based Alloy:

ADMUSTER® C00P

ADMUSTER® C21P

ADMUSTER® C574P

Multi-component(Co-Cr-Fe-Ni-

A nickel-based alloy, with high

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High Strength Materials

Low Cobalt Maraging Steel	High-Strength Maraging Steel
	Powder for Additive	Powder for Additive
	Manufacturing:	Manufacturing:
ADMUSTER® W285P	ADMUSTER® W350P
ADMUSTER® W285P has the	ADMUSTER® W350P is a
same	strength as	general	maraging steel characterized
maraging steel even with a	by its high hardness after
cobalt content of 1% or less.	aging annealing. It can be
(Exempted from control under	adjusted to a higher hardness
class	2 controlled	chemical	than general 300ksi class
substances in Japan) and is	steels.
easy to handle for additive
manufacturing.

■About the new trade name PROTERIAL

Hitachi Metals, Ltd. will change its trade name to Proterial, Ltd. on January 4, 2023.

"Proterial" reflects the essence of our corporate philosophy, which consists of three elements: Mission:

"Make the best quality available to everyone;" Vision: "Leading sustainability by high performance;" and

Values: "Unfaltering integrity" and "United by respect." It combines "pro-" with the word "material." "Pro-" represents our "three pros":

• Professional - work that exceeds expectations
• Progressive - a spirit that keeps challenging
• Proactive -an enterprising attitude

"Material" refers to the high-performance materials that our original technologies produce and which underpin the three pros. With our focus on solving customer issues and bringing new levels of value, we promise to contribute to the realization of a sustainable society through the products and services that embody our philosophy.