Skh51 High Precision Steel Dimensional Stability Your Tool Room Can Trust - China

SKH51 Precision Tool Steel – Consistent Chemistry, Consistent Heat Treatment, Consistent Parts Precision tooling lives or dies on repeatability.

When every batch of steel behaves slightly differently, your heat treatment recipe stops working, grinding allowances shrink, and finished tools drift out of tolerance.

SKH51 precision tool steel (JIS standard, equal to AISI M2, DIN 1.3343 and GB W6Mo5Cr4V2) from Songshun is produced specifically to remove that variance from your production.

What makes our SKH51 precision tool steel repeatable:

1 - Locked chemistry per heat: 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 — narrow internal ranges tighter than the standard allows, so quench response stays predictable.

2 - Hardening-controlled forging on a 7000-ton press: fine, evenly distributed carbides that grow uniformly during austenitizing at 1200–1240°C.

3 - Fully annealed delivery: HB 255 max, verified per batch — your first machining pass matches the last one.

4 - Heat-number traceability: every bar and block tagged, with a mill certificate that follows the shipment — QC evidence on demand.

Dimensional stability benefits you can measure:

- Low distortion after hardening thanks to uniform carbide structure and clean, decarb-free surfaces.

- Predictable growth rates between annealed and hardened condition — our engineers share the expected exact change for your geometry.

- Better flatness on ground plate stock, reducing lapping time on gauges and components.

Typical precision applications:

- Gage blocks and measuring pins holding HRC 62–64 with long-term stability

- Small punches, bushings and guide elements for progressive dies

- Cosmetic cutting tools where edge fineness and size control matter together

- Jig and fixture details that must not move after hardening Formats and sizes: round bar dia 3–300mm (black/peeled/ground), flat bar and plate 5–300mm thick, cut-to-size blocks per your drawing.

Common sizes ex-stock dispatch within 48 hours; custom cut material 3–7 working days.

Put our repeatability to the test: order a trial batch and run your standard heat treatment — we are confident your QC will see the difference.

Send your drawing or size list; our engineers answer with stock position and quotation within 12 hours.

Songshun Steel Massive Stock

We keep a mass stock are over 20000 tons for various steel type, including steel round bar, steel sheet, alloy steel, carbon steel, stainless steel, mold steel, steel coil and etc.

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.
  
  Combined with experienced exporting team and professional technical knowledge, Songshun Steel offers both technical advice and support, as well as global professional steel solution and service.
  
  Due to satisfactory reliable quality and professional service, Songshun expands our market worldwide, such as Colombia, Chile, Spain, Turkey, Iran, Vietnam, Malaysia ,UAE, Canada, Brazil, Mexico and so on.
  
  Songshun specialized in Special Steel for almost 20 years.
  
  We can supply mold steel, high speed steel, alloy steel, free cutting steel and etc.
  
  Welcome your contact 24 hours a day!!!
  
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