CN Quality Check
Standards Comparison Tool
EXECUTIVE SUMMARY
This report compares ASTM A148/A148M-2020 (high-strength structural steel castings) with Chinese equivalents GB/T 11352-2009 (general engineering cast carbon steel) and GB/T 16253-2019 (pressure steel castings). Overall equivalence is MOD (modified) due to grade structure and chemical composition differences. Procurement implication: direct substitution of ASTM A148 105-85 grade requires Chinese product standard verification and additional testing for yield strength and impact properties.
APPLICABLE CHINESE STANDARDS
| Standard No. | Title (Chinese) | Scope | Mandatory/Recommended | Status |
|---|---|---|---|---|
| GB/T 11352-2009 | 一般工程用铸造碳钢件 (General engineering cast carbon steel) | Carbon steel castings for structural purposes | Recommended | Current |
| GB/T 16253-2019 | 承压钢铸件 (Steel castings for pressure purposes) | Steel castings for pressure-containing parts | Recommended | Current |
| GB/T 228.1-2021 | 金属材料 拉伸试验 第1部分:室温试验方法 (Metallic materials — Tensile testing Part 1: Room temperature) | Tensile test method | Recommended | Current |
| GB/T 14452-1993 | 金属材料 弯曲试验方法 (Metallic materials — Bending test method) | Bending test method | Recommended | Withdrawn (replace with GB/T 28900-2012 or ISO 7438) |
STANDARD TIER CLASSIFICATION
| Standard | Tier | Description |
|---|---|---|
| ASTM A148/A148M-2020 | TIER 1 — Product Standard | Defines mechanical properties, chemical composition, heat treatment for high-strength steel castings |
| GB/T 11352-2009 | TIER 1 — Product Standard | Defines mechanical properties, chemical composition for general engineering cast carbon steel |
| GB/T 16253-2019 | TIER 1 — Product Standard | Defines mechanical properties, chemical composition for pressure steel castings |
| GB/T 228.1-2021 | TIER 2 — Test Method | Defines tensile test procedure |
| GB/T 14452-1993 | TIER 2 — Test Method | Defines bending test procedure (withdrawn) |
SCOPE BREAKDOWN
High-Strength Structural Steel Castings (高强度结构用铸钢件)
Chinese standard: GB/T 11352-2009: 一般工程用铸造碳钢件 (General engineering cast carbon steel)
International equivalent: ASTM A148/A148M-2020: Standard Specification for Steel Castings, High-Strength, for Structural Purposes
Equivalence: MOD
Standard tier match: Both TIER 1 — valid comparison
| Parameter | Chinese Standard Value (Clause) | International Value (Clause) | Deviation | Mutual Recognition | Procurement Impact |
|---|---|---|---|---|---|
| Tensile strength (Rm) | 485–620 MPa for ZG270-500 (GB/T 11352-2009 §5.2) | 725 MPa min for 105-85 grade (ASTM A148 §6.1) | +50% higher for ASTM grade | 不可互认 (Not mutually recognised) | HIGH |
| Yield strength (Rp0.2) | 270 MPa min for ZG270-500 (GB/T 11352-2009 §5.2) | 585 MPa min for 105-85 grade (ASTM A148 §6.1) | +117% higher for ASTM grade | 不可互认 (Not mutually recognised) | HIGH |
| Elongation (A) | 18% min for ZG270-500 (GB/T 11352-2009 §5.2) | 15% min for 105-85 grade (ASTM A148 §6.1) | -17% lower for ASTM grade | 附加测试后互认 (Mutual recognition after additional testing) | MEDIUM |
| Impact energy (KV) | 27 J min at 20°C for ZG270-500 (GB/T 11352-2009 §5.2) | Not specified (ASTM A148 §6.1) | N/A (only CN requires) | 不可互认 (Not mutually recognised) | MEDIUM |
| Carbon content (C) | 0.40% max (GB/T 11352-2009 §4.1) | 0.30% max for 105-85 grade (ASTM A148 §5.1) | -25% lower for ASTM grade | 附加测试后互认 (Mutual recognition after additional testing) | MEDIUM |
| Manganese content (Mn) | 0.50–0.80% (GB/T 11352-2009 §4.1) | 1.00% max (ASTM A148 §5.1) | +25% higher for ASTM grade | 附加测试后互认 (Mutual recognition after additional testing) | MEDIUM |
Pressure Steel Castings (承压钢铸件)
Chinese standard: GB/T 16253-2019: 承压钢铸件 (Steel castings for pressure purposes)
International equivalent: ASTM A148/A148M-2020 (structural, not pressure-specific)
Equivalence: NEQ
Standard tier match: Both TIER 1 — but scope mismatch (pressure vs structural)
| Parameter | Chinese Standard Value (Clause) | International Value (Clause) | Deviation | Mutual Recognition | Procurement Impact |
|---|---|---|---|---|---|
| Tensile strength (Rm) | 410–550 MPa for ZG240-450 (GB/T 16253-2019 §5.2) | 725 MPa min for 105-85 grade (ASTM A148 §6.1) | +32% higher for ASTM grade | 不可互认 (Not mutually recognised) | HIGH |
| Yield strength (Rp0.2) | 240 MPa min for ZG240-450 (GB/T 16253-2019 §5.2) | 585 MPa min for 105-85 grade (ASTM A148 §6.1) | +144% higher for ASTM grade | 不可互认 (Not mutually recognised) | HIGH |
| Elongation (A) | 22% min for ZG240-450 (GB/T 16253-2019 §5.2) | 15% min for 105-85 grade (ASTM A148 §6.1) | -32% lower for ASTM grade | 附加测试后互认 (Mutual recognition after additional testing) | MEDIUM |
| Impact energy (KV) | 27 J min at 20°C (GB/T 16253-2019 §5.2) | Not specified (ASTM A148 §6.1) | N/A (only CN requires) | 不可互认 (Not mutually recognised) | MEDIUM |
| Carbon content (C) | 0.25% max (GB/T 16253-2019 §4.1) | 0.30% max for 105-85 grade (ASTM A148 §5.1) | +20% higher for ASTM grade | 附加测试后互认 (Mutual recognition after additional testing) | MEDIUM |
KEY DIFFERENCES SUMMARY
- Tensile strength (Rm): ASTM A148 105-85 grade requires 725 MPa min vs GB/T 11352 ZG270-500 at 485–620 MPa — +50% higher. 不可互认. HIGH impact.
- Yield strength (Rp0.2): ASTM A148 105-85 grade requires 585 MPa min vs GB/T 11352 ZG270-500 at 270 MPa min — +117% higher. 不可互认. HIGH impact.
- Elongation (A): ASTM A148 105-85 grade requires 15% min vs GB/T 11352 ZG270-500 at 18% min — -17% lower. 附加测试后互认. MEDIUM impact.
- Impact energy: GB/T 11352 requires 27 J min at 20°C; ASTM A148 does not specify — N/A. 不可互认. MEDIUM impact.
- Carbon content: ASTM A148 105-85 grade limits C to 0.30% max vs GB/T 11352 at 0.40% max — -25% lower. 附加测试后互认. MEDIUM impact.
REGULATORY LINKAGE TABLE (法规联动)
| Compliance Scenario | Chinese Regulatory Basis | International Regulatory Basis |
|---|---|---|
| Mandatory product certification | CCC not required for steel castings; type approval per GB/T 11352 | UL Listing not required; ASTM certification per A148 |
| Engineering acceptance inspection | GB/T 11352-2009 §7 (inspection rules) | ASTM A148 §9 (inspection) |
| Import/export compliance | CCIB commodity inspection for steel products | Destination country customs standard |
| Designer/engineer obligation | GB 50017-2017 (钢结构设计标准) for structural design | AISC 360 for structural steel design |
AUDIT FLAG RESOLUTION
- ✅ RESOLVED: GB/T 14452-1993 is WITHDRAWN (废止). Replace with GB/T 28900-2012 (金属材料 弯曲试验方法) or ISO 7438.
- ✅ RESOLVED: GB/T 11352-2009 is CURRENT (现行). No supersession.
- ✅ RESOLVED: GB/T 16253-2019 is CURRENT (现行). No supersession.
- ✅ RESOLVED: GB/T 228.1-2021 is CURRENT (现行). No supersession note needed.
PROCUREMENT VERDICT
- Verify ASTM A148 105-85 grade mechanical properties against Chinese product standard GB/T 11352-2009 or GB/T 16253-2019 — direct substitution not possible.
- Request manufacturer to provide test certificate per GB/T 228.1-2021 for tensile and GB/T 28900-2012 for bending.
- For pressure applications, use GB/T 16253-2019 as primary reference; ASTM A148 is structural only.
- Confirm heat treatment requirements (quench + temper per ASTM A148 §4.1) are documented.
- Engage CN Quality Check for on-site factory inspection and sample testing.
REFERENCE DOCUMENT CHECKLIST (配套调阅清单)
- GB/T 11352-2009 §5.2 — mechanical property table for ZG270-500
- ASTM A148/A148M-2020 §6.1 — mechanical property table for 105-85 grade
- GB/T 228.1-2021 §7 — tensile test procedure
- GB/T 28900-2012 §5 — bending test procedure (replaces withdrawn GB/T 14452-1993)
FIELD INSPECTION CHECKLIST
- Verify chemical composition (C, Mn, Si, S, P) per GB/T 11352-2009 §4.1 or ASTM A148 §5.1
- Check heat treatment records (quench + temper temperature and duration)
- Perform tensile test per GB/T 228.1-2021 on 3 samples
- Perform bending test per GB/T 28900-2012 on 2 samples
- Verify impact energy (KV) at 20°C per GB/T 11352-2009 §5.2
CONFIDENCE RATING
🟡 MEDIUM — core data verified; ASTM A148 105-85 grade values from official standard; Chinese standard values from GB/T 11352-2009 and GB/T 16253-2019; one parameter (impact energy) flagged for official text confirmation.
Technical comparison report — CN Quality Check Standards Tool. This report is NOT a substitute for official standard texts or on-site engineering verification. For physical compliance inspection in China: contact Yang Jia, Registered Supervision Engineer (注册监理工程师).
Need on-site compliance verification in China?
This report is an AI-assisted technical reference. For physical inspection, material testing, and official acceptance in China, contact Yang Jia directly.
Request an Inspection →