HAP40 steel comes from Hitachi Metals Ltd. and belongs to the family of powder metallurgy high-speed tool steels. Its alloy blend includes around 1.27% carbon, 4% chromium, 5% cobalt, 6% molybdenum, and 1.3% vanadium, creating a fine, uniform grain structure.
Reaching up to 66–68 HRC, HAP40 steel delivers remarkable sharpness, longevity, blade strength, and high-precision cutting performance. Its long-lasting edge and reliability make it a go-to material for premium Japanese kitchen knives used by professionals and serious cooks.
<div class="dynamic-checkout__content" id="dynamic-checkout-cart" data-shopify="dynamic-checkout-cart"> <shopify-accelerated-checkout-cart wallet-configs="[{"name":"shop_pay","wallet_params":{"shopId":92870279483,"merchantName":"Kasumi Japan","personalized":true}},{"name":"amazon_pay","wallet_params":{"checkoutLanguage":"en_US","ledgerCurrency":"USD","placement":"Cart","sandbox":false,"merchantId":"A2YAWQIMXDDTD8","productType":"PayAndShip","design":"C0002"}},{"name":"paypal","wallet_params":{"shopId":92870279483,"countryCode":"US","merchantName":"Kasumi Japan","phoneRequired":true,"companyRequired":false,"shippingType":"shipping","shopifyPaymentsEnabled":true,"hasManagedSellingPlanState":null,"requiresBillingAgreement":false,"merchantId":"X3ZWABC6BHAV8","sdkUrl":"https://www.paypal.com/sdk/js?components=buttons\u0026commit=false\u0026currency=USD\u0026locale=en_US\u0026client-id=AfUEYT7nO4BwZQERn9Vym5TbHAG08ptiKa9gm8OARBYgoqiAJIjllRjeIMI4g294KAH1JdTnkzubt1fr\u0026merchant-id=X3ZWABC6BHAV8\u0026intent=authorize"}}]" access-token="6865d047ead2b260dfd6648b03f5fa7a" buyer-country="US" buyer-locale="en" buyer-currency="USD" shop-id="92870279483" cart-id="ef7138c256cd8ad10d3106adf94e4c33" enabled-flags="["1b55bc27","2d75a54c"]" > <div class="wallet-button-wrapper"> <ul class='wallet-cart-grid wallet-cart-grid--skeleton' role="list" data-shopify-buttoncontainer="true"> <li data-testid='grid-cell' class='wallet-cart-button-container'><div class='wallet-cart-button wallet-cart-button__skeleton' role='button' disabled aria-hidden='true'> </div></li><li data-testid='grid-cell' class='wallet-cart-button-container'><div class='wallet-cart-button wallet-cart-button__skeleton' role='button' disabled aria-hidden='true'> </div></li><li data-testid='grid-cell' class='wallet-cart-button-container'><div class='wallet-cart-button wallet-cart-button__skeleton' role='button' disabled aria-hidden='true'> </div></li> </ul> </div> </shopify-accelerated-checkout-cart> <small id="shopify-buyer-consent" class="hidden" aria-hidden="true"> One or more of the items in your cart is a recurring or deferred purchase. By continuing, I agree to the <span id="shopify-subscription-policy-button">cancellation policy</span> and authorize you to charge my payment method at the prices, frequency and dates listed on this page until my order is fulfilled or I cancel, if permitted. </small> </div>
