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240 Landmarks TopProduction > Vanadium-added heat-resistant cast iron
 Vanadium-added heat-resistant cast iron
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By adding an appropriate amount of vanadium to cast iron, the iron obtained excellent high temperature strength and thermal fatigue life characteristics. Replacing niresist cast iron, vanadium-added heat-resistant cast iron reduced the costs of the exhaust manifold.
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Year manufactured:2002
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Manufacturer:Suzuki Motors Limited
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Installation vehicle:All (turbo specification vehicles), etc.
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Designed by:Aisin Takaoka Co., Ltd.
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Structure, type, measure, means, etc.:By adding an appropriate amount of vanadium to cast iron, the iron obtained excellent high temperature strength and thermal fatigue life characteristics, and also reduced costs.
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Function, effect, etc.:Improved high temperature strength, annual fatigue life, machinability
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Effect:This iron has durability at least 1.8 times better than exhaust manifolds that use conventional cast iron. It replaced expensive niresist cast iron, reducing manufacturing costs by at least 55%.
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Points of interest, topicality:Awarded the Ichimura Contribution Prize of The New Technology Development Foundation
Awarded the 55th JSAE Technological Development Award
Awarded the 21st Sokeizai Industry Technology Sokeizai Center President's Award
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Features:Vanadium cast iron was developed aiming at improving high temperature characteristics by designing an alloy added with an appropriate amount of vanadium. The iron has excellent high temperature strength and thermal fatigue life, allowing use at a high temperature range that is impossible with conventional cast iron. It also reduced costs. Vanadium cast iron is suitable for parts reaching high temperatures such as the exhaust manifold of turbo engines.
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Reference materials:■Nobuaki Suzuki et al., Koukeiso Kyujyo Kokuen Chutetsu No Koontokusei Ni Oyobosu Moribuden Oyobi Banajiumu No Eikyo, Chuzo Kogaku, Vol. 76, No. 10, pp. 815-822 (2004)
■Nobuaki Suzuki et al., Development of Vanadium-added Heat Resistant Cast Iron for Exhaust Manifold, Journal of Society of Automotive Engineers of Japan, Vol. 57, No. 9, pp. 108-112 (2003)
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