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Material We Use
Material Quality

Material source is the key to quality. Tien-I is a member of China Steel Corporation (CSC), the leading steel company in Taiwan.
We also collaborate with other excellent international steel companies, including Nippon Steel Corporation, to provide special alloy steel for your various designs.

Heat Treatment

Treating materials with heat alters its stability and, in some cases, its chemical properties. Suitable heat treatment can strike the perfect balance between cost and longevity.

Tien-I performs three main types of heat treatment:
- Continuous Furnace
- Batch Furnace
- Vacuum Furnace

Eco-Friendly Plating

While treating surfaces with improves both durability and appearance, traditional plating methods have been associated with serious environmental hazards.

By choosing to work exclusively with qualified plating factories compliant with government environmental regulation and international ROHS requirements, we aim to supply quality products that do not harm the environment.

Material Components

Cr-Mo Steels
StandardCHEMICAL COMPOSITION
JISANSIDINCSiMnPSNiCrMoV
SCM4354130
SCM440414042CrMo40.38-0.430.15-0.350.60-0.85≦0.030≦0.030-0.90-1.200.15-0.30-
Carbon Steels
StandardCHEMICAL COMPOSITION
JISANSIDINCSiMnPSNiCrtotV
SWRCH81008≦0.08-≦0.60≦0.040≦0.040----
S15C1015CK150.13-0.180.15-0.350.30-0.60≦0.030≦0.035----
S45C1045CK450.42-0.480.15-0.350.60-0.90≦0.030≦0.035----
Alloy Tool Steels
StandardCHEMICAL COMPOSITION
JISANSIDINCSiMnPSNiCrMoV
S2 M0.65-0.701.00-1.250.45-0.60≦0.025≦0.025-0.10-0.300.40-0.500.15-0.25
Free Cutting Steels
StandardCHEMICAL COMPOSITION
JISANSIDINCSiMnPSNiCrMoPb
SUM4311440.40-0.48-1.35-1.65≦0.0400.24-0.33----
S45CL10L450.42-0.480.15-0.350.60-0.90≦0.030≦0.035---0.10-0.35
Medium-Carbon Alloy Steels
StandardCHEMICAL COMPOSITION
JISCSCDINCSiMnPSNiCrA1V
40ACR0.40-0.44≦0.100.60-0.90≦0.030≦0.030-0.20-0.40≧0.010-
CR-V
StandardCHEMICAL COMPOSITION
JISANSIDINCSiMnPSNiCrMoV
50BV300.27-0.33≦0.100.70-1.00≦0.030≦0.035-0.30-0.50>0.00050.10-0.50
Ni-Cr-Mo Steels
StandardCHEMICAL COMPOSITION
JISANSIDINCSiMnPSNiCrMoV
SNCM220862021NiCrMo20.17-0.230.15-0.350.60-0.90≦0.030≦0.0300.40-0.700.40-0.650.15-0.30-
8660+V0.56-0.640.15-0.350.75-1.00≦0.035≦0.0400.40-0.700.40-0.600.15-0.250.15-0.25
Spring Steels
StandardCHEMICAL COMPOSITION
JISANSIDINCSiMnPSNiCrMoV
SUP10615050CrV40.47-0.550.15-0.350.65-0.95≦0.035≦0.035-0.80-1.10-0.15-0.25
High C-Cr Steels (Bearing Steels)
StandardCHEMICAL COMPOSITION
JISANSIDINCSiMnPSNiCrMoV
SUJ252100100Cr60.95-1.100.15-0.35≦0.50≦0.025≦0.025-1.30-1.60--
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