How to Choose the Right Shear Blades for High-Temperature Metal Processing
Key Sections
1. The Challenge of Hot Shearing
High-temperature metal processing (600°C-900°C) causes ordinary shear blades to soften quickly. This leads to:
Lower hardness: Blades lose their ability to cut cleanly
Poor shearing performance: Uneven cuts and low efficiency
Frequent blade replacement: Wastes time and increases costs
A key term here is "Red Hardness" — the ability of blades to keep their hardness in high temperatures. H13 and 6CrW2Si are designed to have strong red hardness, solving these problems.
2. Superior Material Selection
H13 (4Cr5MoSiV1) Hot Work Die Steel
H13 is a high-quality hot work die steel, perfect for high-temperature shearing. Key details:
Chemical composition: C (0.32-0.45%), Cr (4.75-5.50%), Mo (1.10-1.75%), Si (0.80-1.20%), V (0.80-1.20%)
Element impact: Cr: Improves wear resistance and hardenability
Mo: Enhances high-temperature stability and resists thermal fatigue
V: Refines blade structure, makes it tougher and less likely to deform
Si: Boosts oxidation resistance in high temperatures
Core performance: Maintains hardness and cutting ability above 700°C, not easy to soften or crack
Chemical composition (simplified): C (0.32-0.45%), Cr (4.75-5.50%), Mo (1.10-1.75%), Si (0.80-1.20%), V (0.80-1.20%)
How elements affect performance: Cr boosts wear resistance; Mo improves high-temperature stability; V makes blades tougher and less likely to deform
Main advantage: Maintains hardness and performance even above 700°C
6CrW2Si Alloy Tool Steel
6CrW2Si is a reliable alloy tool steel for medium-temperature shearing. Key details:
Chemical composition: C (0.55-0.65%), Cr (1.00-1.30%), W (2.00-2.50%), Si (0.60-0.90%)
Element impact: W: The core element for red hardness, keeps blades hard at medium temperatures
Si: Improves oxidation resistance and overall strength
Cr: Enhances hardenability and wear resistance
Core performance: Good toughness and chipping resistance, suitable for medium-temperature work
3. Preventing Thermal Fatigue & Cracking
Vacuum Heat Treatment
It optimizes blade structure and prevents cracking.
4. Impact on Production Efficiency
Blade Replacement Tips
Long-life blades cut down on replacement time and cost.
5. Material Details (H13 & 6CrW2Si)
6CrW2Si Alloy Tool Steel
Chemical composition: C (0.55-0.65%), Cr (1.00-1.30%), W (2.00-2.50%), Si (0.60-0.90%)
Element impact: W ensures red hardness; Si boosts oxidation resistance; Cr improves wear resistance
Hardness: HRC 60-62 (after heat treatment)
Best for: Hot shearing below 500°C, light stainless steel and medium-strength steel
H13 (4Cr5MoSiV1) Hot Work Die Steel
Chemical composition: C (0.32-0.45%), Cr (4.75-5.50%), Mo (1.10-1.75%), Si (0.80-1.20%), V (0.80-1.20%)
Element impact: Cr for wear resistance; Mo for high-temperature stability; V for toughness and anti-deformation
Hardness: HRC 50-55 (after heat treatment)
Best for: Hot shearing above 700°C, thick plates and high-strength alloy steel
6. Selection Guide
When to Choose 6CrW2Si
Use 6CrW2Si for these scenarios: Hot shearing below 500°C, light stainless steel and medium-strength steel. Its W and Si elements ensure it stays hard at medium temperatures, with good toughness to avoid chipping.
When to Choose H13
Use H13 for these scenarios: Hot shearing above 700°C, thick plates and high-strength alloy steel. Its Cr, Mo and V elements keep it stable in high heat, with strong resistance to deformation and cracking.
7. Notes
Hardness is not always better. Balance hardness and toughness — too hard blades chip easily; too soft blades wear out fast.
Heat treatment affects blade performance greatly. Use professional processes (e.g., vacuum heat treatment) to bring out the best in H13 and 6CrW2Si, maximizing their strength and service life.
For sticky materials (e.g., stainless steel, aluminum), choose H13 or 6CrW2Si. Their chemical composition prevents sticking and chipping, keeping cutting smooth.
Blade Metal Materials International Grade Corresponding Table
China (GB) | USA(ASTM) | Japan (JIS) | Germany (DIN) | Germany (W-Nr) | France (NF) | Russia (ROCT) | U.K (BS) |
6CrW2Si | - | - | 60WCrV7 | 1.255 | 55WC20 | 6XB2C | - |
4Cr5MoSiVI | H13 | SKD61 | X40CrMoV5-1 | 1.2344 | X40CrMoV5 | 4X5MO1C | BH13 |
Our quality: All mechanical parts, tools, and molds are manufactured in-house. Upon arrival at our warehouse, products undergo rigorous inspection by a dedicated quality control department. The following is our production process:
1. Blanking-choose materials according to customer requirements.
2. Forging-Forging is mainly to increase the density of the material.
3 .Annealing-to lower the temperature for processing.
4 .Finishing ---- mainly processing materials.
5 .Inspection ---- Inspect whether the product is consistent with the drawing sample.
6.Quenching ---- Improve the hardness of molded products and materials.
7 .Annealing-In order to increase the wear resistance of the product, it must be annealed for a long time to prevent the blade from breaking
8 .Tempering-mainly the parallelism of the tempering products for processing.
9 .Rough grinding ---- rough grinding the surface of the product.
10.Precision grinding ---- Super-precision grinding and mirror grinding to improve the accuracy and parallelism of the product.
11. Inspection-Let unqualified products refuse to flow into the market.
12 .Packing ---- Pack differently according to different products.
Global Supply: High-Performance Hot Shear Blades & Heat Resistant Knives
We manufacture premium Hot Shear Blades (Material: H13, H13K, HMB) specifically engineered for high-temperature metal cutting in steel mills, rolling lines, and forging shops. Our heat-resistant knives feature exceptional red hardness, thermal fatigue resistance, and high-temperature toughness, ensuring stable performance and extended service life when cutting red-hot billets, bars, and plates. Precision-heat treated to maintain edge integrity under extreme thermal stress.
Multi-language Index for Hot Rolling & Forging Sourcing:
English: Hot Shear Blade | Heat Resistant Metal Cutting Knife | Hot Billet Shear Knives
French (Français): Lames de cisaillement à chaud | Couteaux de coupe résistants à la chaleur
Portuguese (Português): Lâminas de corte a quente | Facas resistentes ao calor para corte de metal
Polish (Polski): Noże do cięcia na gorąco | Noże żaroodporne do metalu | Noże do kęsisk
Turkish (Türkçe): Sıcak Kesme Bıçakları | Isıya Dayanıklı Metal Kesme Bıçakları
Vietnamese (Tiếng Việt): Lưỡi dao cắt nóng | Dao cắt kim loại chịu nhiệt | Dao cắt phôi nóng
Thai (ภาษาไทย): ใบมีดตัดเหล็กร้อน | มีดตัดโลหะทนความร้อน | ใบมีดตัดบิลเล็ต
Filipino: Mga Blade pang-Hot Shear | Kutsilyong Metal na Heat Resistant
Arabic (العربية): شفرات القص الساخن | سكاكين قطع المعادن المقاومة للحرارة
Hindi (हिन्दी): हॉट शियर ब्लेड | गर्मी प्रतिरोधी धातु काटने वाले चाकू | हॉट बिलेट शियर चाकू
Indonesian (Bahasa Indonesia): Pisau Potong Panas | Pisau Pemotong Logam Tahan Panas
Malay (Bahasa Melayu): Bilah Gunting Panas | Pisau Pemotong Logam Tahan Haba
Dutch (Nederlands): Warmteschaarmessen | Hittebestendige metaalsnijmessen | Warmgewalste messen
Swedish (Svenska): Varmsaxknivar | Värmebeständiga metallskärknivar | Knivar för varmvalsning
Hungarian (Magyar): Melegvágó pengék | Hőálló fémvágó kések | Meleg tuskóvágó kések
Greek (Ελληνικά): Λεπίδες θερμής κοπής | Μαχαίρια κοπής μετάλλων ανθεκτικά στη θερμότητα
Danish (Dansk): Varmskæreblade | Varmebestandige metalklippeknive | Varmvalseknive
Norwegian (Norsk): Varmskjæreblader | Varmebestandige metallskjærekniver
Finnish (Suomi): Kuumaleikkausterät | Lämmönkestävät metallinterät | Kuumavalssauksen terät
Czech (Čeština): Nože pro stříhání za tepla | Žáruvzdorné nože na kov | Nože na horké sochory
Romanian (Română): Cuțite tăiere la cald | Lame de tăiat metal rezistente la căldură
Slovak (Slovenčina): Nože na strihanie za tepla | Žiaruvzdorné nože na kov | Sekacie nože na sochory
Bulgarian (Български): Ножове за горещо рязане | Термоустойчиви ножове за метал
Croatian (Hrvatski): Noževi za rezanje u toplom stanju | Noževi otporni na toplinu
Ukrainian (Українська): Ножі для гарячої різки | Жаростійкі ножі для металу
Azerbaijani (Azərbaycan dili): İsti kəsim bıçaqları | İstiyə davamlı metal kəsən bıçaqlar
Bengali (বাংলা): হট শিয়ার ব্লেড | তাপ প্রতিরোধী ধাতু কাটার ছুরি | বিলেট কাটিং ব্লেড
Tamil (தமிழ்): ஹாட் ஷீயர் பிளேடுகள் | வெப்பத்தை தாங்கும் மெட்டல் கட்டிங் கத்திகள்
Persian (فارسی): تیغه های برش گرم | چاقوهای برش فلز مقاوم در برابر حرارت
Hebrew (עברית): להבי גזירה בחום | סכיני חיתוך מתכת עמידים בחום
Afrikaans: Warm-snylemme | Hittebestendige metaalsnymesse | Warm-knuppel snymesse