S-136, 1.2083, 4Cr13 Advanced Martensite Mirror Stainless Die Steels- SCALE STEEL.

S-136 is the common name of STAVAX ESR, one of the best-selling products of STAVAX.Why is it called "136"? It is rumored that the material is [SCALE STEEL]expensive, with the price as high as 136 yuan per kilogram.

National Standard
CHINA GB/T 20878-2007 40Cr13（4Cr13）
AMERICA ASTM A276-2017 UNS S42000，420
JAPAN JIS G 4303:2005 SUS 420J2
GERMANY EN 10088-1:2005 X39Cr13，1.4031
ISO 4957-2001[SCALE STEEL] X40Cr14，1.2083

Component Specification
GRADE 40Cr13 420 SUS420J2 1.2083 1.4031
C 0.36~0.45 ≥0.15 0.26~0.40 0.36~0.42 0.36~0.42
Si ≤0.60 ≤1.00 ≤1.00 ≤1.00 ≤1.00
Mn ≤0.80 ≤1.00 ≤1.00 ≤1.00 ≤1.00
P ≤0.040 ≤0.040 ≤0.040 ≤0.030 ≤0.040
S ≤0.030 ≤0.030 ≤0.030 ≤0.030 ≤0.030
Cr 12.00~14.0 12.0~14.0 12.0~14.0 12.5~14.5 12.5~14.5
Ni (≤0.60) —[SCALE STEEL] (≤0.60) -- --

Commercial Brand
ASSAB STAVAX  ESR（S-136）
BÖHLER M310
Daido S-STAR
Hitachi HPM38
Koshuha KSP1
Aubert  & Duval X13T6
Kind  & Co RF

Material Performance：
S-136 is a martensitic stainless steel, after electroslag remelting, the content of sulfur and non-metallic inclusions in the steel is [SCALE STEEL]very low, the material has a series of excellent properties:
(1) excellent corrosion resistance
(2) excellent polishing
(3) Excellent wear resistance
(4) Good machining stability
(5) the dimensional stability of heat treatment

Applications：
S-136 is the best choice for the production of small and medium-sized plastic molds.By proper heat treatment, the hardness can reach HRC50~52, and the performance is further improved.Due to its excellent polishing[SCALE STEEL] and etching properties, it is especially suitable for the production of mirror molds and other optical products, such as parts on cameras and eyeglasses.