Non-Quenched and Tempered Steel:
KNM-1,KNM-1144 HRC28 up,SMW-1144 HRC20 up -40/101J low-temperature impact toughness,KNM-S45C
QT Bar/HT Bar,Non-heat-treated bar
Steel bar requiring no quenching and tempering
ASTM A108 (Standard Specification for Steel Bar
Carbon and Alloy, Cold-Finished): Uses class designations to specify chemical compositions, surface quality, or thermal treatment levels.

**Professional Business/Technical Translation
Our product, KNM-1144, achieves a hardness of HRC 28 or higher through specialized processing. Its technical specifications are equivalent to market-grade high-strength non-quenched and tempered steels (e.g., Swiss ETG 100 / ETG 88 and US Stress proof Class B standards).

Carbon Steel:SS400, S15C∼S55C

Free Cutting Steel: 12L14,1215,1215MS,1144,11SMnPb30,SCM415L,SNCM439

High-Carbon Bearing Steel:SCM415,420,435,440(H), SUJ2

Alloy Steel:S2,S3,BT9865V,9865V,6150,8660,Ti, GT-60, GT-70, SUP12

Stainless Steel:SUS304,304L,303,303CU,316 SUS416,420,420F,430,440C,630,631

Alloy Tool Steel: SKD

Taiwan：CSC, Feng Hsin Steel
Japan：Nippon Steel & Sumitomo Metal,
Dadio Steel, JFE, Godo Steel
China：Jiangsu Yonggang Group
Europe：
British Steel
ArcelorMittal
Saarstahl

Carbon Steel :S15C-S55C
Middle-High Carbon Steel: SWRH42-82 (A/B)
High-Carbon Bearing Steel :SCM415-440(H)
Alloy Steel:S2,S3,BT9865V,9865V,6150,8660,Ti,GT-60,GT-70,SUP12