Skh51 Stamping Die Steel Selecting The Right Hss For High Volume Press Work - China

SKH51 Stamping Die Steel – Matching Die Material To Press Speed, Sheet Thickness And Tool Life Targets Choosing stamping die steel is a cost equation: material price per kilogram versus die life per million strokes.

For punches, die inserts and cutting sections in high-volume press work, SKH51 (JIS standard, equal to AISI M2, DIN 1.3343 and GB W6Mo5Cr4V2) occupies the sweet spot between ordinary D2 tool steel and expensive powder-metallurgy grades — and this guide shows when it is the right call.

When SKH51 stamping die steel wins:

1 - High-speed progressive dies: press speeds above 400 SPM punish tougher die steels; SKH51 holds HRC 63–65 with the impact resistance D2 lacks.

2 - Thin and medium sheet (0.1–3mm): sharp edges stay crisp thanks to fine vanadium carbides (V 1.75–2.20%).

3 - Punches under transverse load: forged toughness resists the chipping that suddenly stops a press line.

4 - Re-sharpenable die details: unlike carbide, SKH51 grinds easily for economical regrinds between production runs.

Recommended specification for stamping die components:

- Starting material: SKH51 forged and fully annealed, HB 255 max for machining

- Hardening: austenitize 1200–1240°C (lower end for toughness-critical punches), quench in vacuum or salt

- Tempering: triple cycle at 550–580°C → final HRC 62–65 (62–63 for impact-loaded punches, 64–65 for wear-critical inserts)

- Surface upgrade option: TiN/TiAlN or nitriding adds edge life in abrasive sheet materials Songshun supply formats for die makers:

- Round bar dia 3–300mm for turned punch and die details

- Flat bar and plate 10–300mm thick for die sections and inserts

- Ground blocks with tight flatness for precision die assemblies

- Cut-to-size blanks delivered ready for your heat treatment Documentation with every shipment: heat-number traceability, mill certificate with full chemistry (C 0.80–0.90 / Cr 3.80–4.40 / Mo 4.50–5.50 / W 5.50–6.75 / V 1.75–2.20), UT reports above 50mm, optional SGS/BV inspection before loading.

Compare against your current die material: send us sheet thickness, press speed and current die life — our engineers will estimate the SKH51 advantage for your application and quote within 12 hours.

Songshun Company Website: https: //songshunsteel.

com/

Company Contact:

• Posted By: Dongguan Songshun Mould Steel Co., Ltd.

• Phone: 0086 0769 85475596

• Address: 1st Floor, No. 1, Dongda Fourth Street, Shatou Community, Chang'an Town, Dongguan , GuangDong , China

• Email:

• Website: https://songshunsteel.com/

• Business Description: Established in 2009,Songshun Steel supplies a wide range of carbon, alloy and tool steel products, including high speed tool steel, cold work tool steel, hot work tool steel, plastic mould steel, engineering steel and machine structural steel etc.
  
  After more than 10 years development and growing, Songshun Steel becomes one comprehensive special steel factory, stockist and exporter.
  
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