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KJ738H-S
Classic Pre-hardened Forged Plastic Mold Steel
General-purpose pre-hardened plastic mould steel, suitable for molds used in home appliance and office plastic products such as air conditioner housings, washing machine tubs and panels, and copiers. Injection molds for automotive interior and exterior parts such as bumpers, dashboards, door panels, headlight housing, and rearview mirrors.
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Application Cases
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Product Features

  • Customized according to German imported 1.2738 standard.

  • Pre-hardened steel with hardness adjustable upon request between 32–38 HRC.

  • Uniform structure and composition, with leather grain etching performance.

  • Consistent hardness and stable machinability.

  • Good toughness, resistant to cracking and edge chipping.

Grade Comparison
KJ738H-S
German W.Nr
1.2738		U.S. AISI
P20+Ni		Sweden ASSAB
718HH		China Baowu
SW718H-P
Chemical Composition (wt%)
KJ738H-S
C
0.35-0.45		Si
0.2-0.4		Mn
1.30-1.60		P
≤0.030		S
≤0.030		Cr
1.80-2.10		Mo
0.15-0.25		Ni
0.9-1.2
Non-Metallic Inclusions
Type A (Sulfides)Type B (Aluminates)Type C (Silicates)Type D (Oxides)
Fine Series ≤1.5
Heavy Series ≤1.0		Fine Series ≤1.5
Heavy Series ≤1.0		Fine Series ≤1.5
Heavy Series ≤1.0		Fine Series ≤1.5
Heavy Series ≤1.0
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