H21 Tool Steel | 1.2581 | 3Cr2W8V | 30WCrV9 | SKD5 Hot Work Steel

H21 Tool steel is a hot work W-Cr-Mo Tungsten hot work steel belong to ASTM A681-1999 Steel Grade standard. H21 Special Steel China Supplier and factory Otai Special Steel Supply H21 Tool steel in Round bar, Plate, Flat bar, Square, Forging Ring and others any shape. And provide cutting, sawing, milled, machining processing.

Supply Form of H21 Steel -ASTM A681 Hot Work Tool Steel
Supply Range of SAE H21 Steel

 

H21 Steel Round Bar: diameter 5mm – 400mm

H21 Steel Plate: thickness 10 –500mm x width 200– 1400mm

H21 Steel Block: 210mm x 500-810mm

H21 TOOL STEEL -round-bar

Chemical Composition of H21 Tool Steel Material
ASTM A681 C Si Mn P S Cr W V
H21/T20821 0.26～0.36 0.15～0.50 0.15～0.40 0.030 Max 0.030 Max 3.00～3.75 8.50～10.0 0.30～0.60
DIN 17350 C Si Mn P S Cr W V
1.2581/ X30WCrV9-3 0.25～0.35 0.15～0.30 0.20～0.40 0.035 Max 0.035 Max 2.50～2.80 8.00～9.00 0.30～0.40
GB/T 1299 C Si Mn P S Cr W V
3Cr2W8V 0.30～0.40 ≤0.40 ≤0.40 0.030 Max 0.030 Max 2.20～2.70 7.50～9.00 0.20～0.50
JIS G4404 C Si Mn P S Cr W V
SKD5 0.25～0.35 0.10～0.40 0.15～0.45 0.030 Max 0.020 Max 2.50～3.20 8.50～9.50 0.30～0.50

 

H21 tool Steel Equivalent and Related Speciation
USA German Japan China ISO
ASTM A681 DIN 17350 JIS G4404 GB/T 1299 ISO 4957
H21 1.2581 SKD5 3Cr2W8V 30WCrV9

 

ASTM AISI H21 Tool Steel Material Mechanical Properties

Bulk modulus: 140 GPa Metric

Shear modulus: 80.0 GPa Metric

Hardness, Rockwell C: 40-55 HRc

Forged of hot work H21 Steel material metal

Heat to 1150 °C, keep enough time, then start foring, when below 900°C no forging.  Finished forging slowly cool..

Heat Treatment of SAE/AISI H21 Steel
  • H21 Steel Annealing

Heat to 885°C, then cool in heat treatment at about 4°C per hour. After annealing Hardness 235 HBS Max.

  • H21 tool Steel Hardening
  • Quenching of H21 Steel material

Quenching temperature / ℃ | salt bath furnace: 1177

Quenching temperature / ℃ | controlled atmosphere furnace: 1191

The heat preservation time/min: 5 ~ 15

Quenching medium: air cooling

  • Tempering Of H21 Steel

Tempering temperature / ℃ : 552

After tempering hardness HRC or higher: 52

Application of Sae AISI H21 tool Steel

H21 steel is a Mo content increased by 2%, appropriate to join the Mn content, improved the high temperature mechanical properties of steel, to adapt to the demands of the mass production of aluminum alloy die-casting mould. The steel has high flexibility, high heat stability, good resistance to wear and process performance, the working temperature of 650 ℃.

Quality Assured of Sae H21 Steel

Quality assured by Our ISO 9001:2008 quality management system. Our all H21 tool steel all had by SEP 1921-84 ultrasonic inspection (UT Test). Quality Grade: E/e, D/d, C/c.

If you have any H21 steel inquiry and question for Price, Application, hot treatment, please don’t hesitate to contact us.

Email: Jack@otaisteel.com

Tel:  +86-769- 23190193

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